JP2004300674A

JP2004300674A - Waterproof sheet for roof and waterproofing execution method using the same

Info

Publication number: JP2004300674A
Application number: JP2003091499A
Authority: JP
Inventors: Yasuo Fukuchi; 保雄福地; Yasuhiro Hoshimoto; 泰弘星本
Original assignee: Asahi Rubber Inc; Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd; Asahi Rubber Inc
Priority date: 2003-03-28
Filing date: 2003-03-28
Publication date: 2004-10-28
Anticipated expiration: 2023-03-28
Also published as: JP3702277B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide waterproof sheets for roofs capable of securing a specified covering width and applying a secure waterproof treatment, even if they are loaded in layers while being made to match with the upper face shape of roof tiles and a waterproofing execution method using the sheets. <P>SOLUTION: Metallic sheets 3 having deformable and self-shape retainable property are fixedly laminated on a flexible sheet 2 with a cut off function. A turnup overlapped part 4 is formed in the substantially right-angled direction against the width direction in the breadthwise midway of the waterproof sheet 1 for roofs. The flexible sheet 2 and the metallic sheets 3 are laminated at least at the turnup overlapped part 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、屋根用防水シート、及びこれを用いた防水施工方法に関する発明である。
【０００２】
【従来の技術】
従来から、天窓近傍部位の屋根や屋根と外壁との接続部位のように、屋根にあって形状変化が生じる部位には、該形状変化部位から雨水を建物内に侵入させないようにするため、屋根の形状変化部位に亙って屋根用防水シートなどを敷設して防水処理を施すものであった。図１４，１５には天窓近傍部位の屋根における防水構造を示す（たとえば、特許文献１参照）。このものは、屋根下地６に設けた開口５に天窓７を配設し、天窓７の周囲に水切り部材１０を配設し、水下側の水切り部材１０と屋根下地６に葺設した瓦材８との間に屋根用防水シート１を配設することで、防水処理を施したものである。詳しくは、屋根用防水シート１の上半部は水切り部材１０の下面にもぐり込むようにされて屋根下地６上に載設され、また屋根用防水シート１の下半部は瓦材８上に載設されている。ここで、上記瓦材８上に積層載置される屋根用防水シート１は、瓦材８との間に水密構造を形成させるため、瓦材８の上面に隙間無く沿わせるように積層載置させている。なお、図中９は瓦材８を載設させる瓦桟である。
【０００３】
【特許文献１】
特許第３０８７１５４号明細書
【０００４】
【発明が解決しようとする課題】
ところで、屋根に葺設する瓦材８にあっては、しばしばその上面に波形状などの凹凸形状を施したものが使用される。そして、このような瓦材８の上面形状が平面状ではなく波形状などの凹凸が施してある場合には、平面状のものよりも該凹凸形状によって表面積が増大する。しかして、上述したように、屋根用防水シート１の上半部を屋根下地６などの平面部分に載設し、屋根用防水シート１の下半部を瓦材８上面の凹凸形状部分に沿わせて載設した際には、屋根用防水シート１の下半部は上半部に比べてその幅寸法は縮んでしまうものである（Ｈ＞ｈ）。したがって、狙った瓦材８の上面全てを被覆できなくて、防水処理に悪影響を及ぼしてしまう恐れがあった。
【０００５】
本発明は上記の点に鑑みてなされたものであり、瓦材の上面形状に合わせて積層載置しても、所定の被覆幅を確保できて確実な防水処理を施し得るようにした屋根用防水シート、及びこれを用いた防水施工方法を提供することを課題とするものである。
【０００６】
【課題を解決するための手段】
上記課題を解決するために本発明に係る屋根用防水シートは、止水性を備えた可撓性シート２に、変形可能で且つ自己保形性を備えた金属シート３を積層固定し、屋根用防水シート１の幅方向の途中に該幅方向と略直交する方向に亙って折返し重合部４を形成し、少なくとも該折返し重合部４では可撓性シート２と金属シート３とを積層したことを特徴とする。これによると、屋根用防水シート１における折返し重合部４の長さ方向の一方の片側半部を屋根下地６などの平面部分に添わせて載設すると共に、屋根用防水シート１における該長さ方向の他方の片側半部を波形状など凹凸形状が施された瓦材８の上面に添わせて載設する際には、平面形状を被覆する部位では折返し重合部４はそのままにし、凹凸形状を被覆する部位では折返し重合部４を広げるようにすることで、平面形状より表面積が大となる凹凸形状に合わせて屋根用防水シート１の適所を幅方向に広げることができ、しかして、屋根用防水シート１の被覆幅を平面被覆部分と凹凸形状被覆部分とにかかわらず略同一寸法にできる。したがって、従来技術のように平面被覆部分の幅寸法を凹凸形状被覆部分では確保できないといった事態を無くすることができ、確実に屋根に防水処理を施し得るようにできる。また、少なくとも折返し重合部４に自己保形性のある金属シート３を位置して設けたので、折返し重合部４の形状変化を保形でき、ひいては形状変化した屋根用防水シート１の保形を確保できる。
【０００７】
また、折返し重合部４を、間隔を隔てて複数並設したことも好ましい。これによると、折返し重合部４を広げて行う屋根用防水シート１の幅方向への延伸を全体としてより大きくできると共に、屋根用防水シート１の保形を複数箇所の金属シート３で行うことで屋根用防水シート１の全体形状をより保形し易くできる。
【０００８】
また、可撓性シート２の片面の全面に亙って金属シート３を積層固定したことも好ましい。これによると、屋根用防水シート１の保形を全面に亙る金属シート３で行うことで屋根用防水シート１の全体形状をより精密に保形し易くできる。
【０００９】
また、折返し重合部４に位置する可撓性シート２の部位のみに金属シート３を積層固定したことも好ましい。これによると、折返し重合部４の形状変形を保形できるから屋根用防水シート１の保形を確保できることに加え、折返し重合部４以外の金属シート３を省いて屋根用防水シート１のコスト低廉化を図ることができる。
【００１０】
また、折返し重合部４を、山折部４ａと谷折部４ｂとを連続して設けると共に、山折部４ａを谷折部４ｂの上側に位置するように重合して形成したことも好ましい。これによると、屋根用防水シート１を幅方向に引っ張ることで山折部４ａと谷折部４ｂとが引き伸ばされるから、簡単な施工で施工箇所の表面形状に合わせて屋根用防水シート１を載設できる。
【００１１】
また、可撓性シート２を、加硫ゴム製または樹脂製のシートで構成したことも好ましい。これによると、可撓性シート２を外方に露出せる表面に配置した際には、金属シート３が外方に露出されず、屋根用防水シート１が雨水に晒されたとしても金属シート３に雨水が当たることがなくて金属成分が雨水に溶け出すことを防止できて周囲の環境の汚染を防止できる。
【００１２】
また、金属シート３を、厚さ０．０５〜０．２ｍｍのアルミニウムシートで構成したことも好ましい。
【００１３】
また、金属シート３の端縁位置を、可撓性シート２の端縁位置と同等若しくは内方位置に位置したことも好ましい。これによると、屋根用防水シート１の端縁に金属シート３が突出することがなくて、屋根用防水シート１の取扱いにかかる安全性を高めることができる。
【００１４】
また、積層固定した可撓性シート２と金属シート３との間に、可撓性シート２と金属シート３とを貼り合わせる接着剤層１８を設けたことも好ましい。これによると、可撓性シート２と金属シート３とを容易に積層固定できる。
【００１５】
また、接着剤層１８の端縁位置を、可撓性シート２及び金属シート３の端縁位置よりも内方に位置したことも好ましい。これによると、施工箇所の表面形状に屋根用防水シート１の形状を合わせるべく木槌などで屋根用防水シート１をたたいた場合に、可撓性シート２と金属シート３との間から接着剤層１８が外方にはみ出て施工箇所などに付着してしまう事態を無くすることができる。
【００１６】
また、可撓性シート２を、厚さ０．４〜１．５ｍｍの加硫ゴムシートで構成すると共に、接着剤層１８を、厚さ０．５〜２．０ｍｍの粘着性ブチルゴム層で構成したことも好ましい。これによると、積層した加硫ゴムシートと粘着性ブチルゴム層との間では加硫ゴムシートに粘着性ブチルゴム層の可塑剤が継続的に供給されるようになり、加硫ゴムシートで構成された可撓性シート２の耐侯性、柔軟性を継続的に向上できる。
【００１７】
また、屋根用防水シート１の裏面の少なくとも一部に粘着シート１９を積層固定したことも好ましい。これによると、粘着シート１９を施工箇所に貼着させることにより、屋根用防水シート１を粘着シート１９によるシールを伴って施工箇所に固定させることができると共に、粘着シート１９にて屋根用防水シート１の変形時の衝撃を緩衝できて金属シート３の破損防止に資することができる。
【００１８】
また、粘着シート１９の裏面に剥離紙２０を設けたことも好ましい。これによると、屋根用防水シート１の使用時には剥離紙２０を剥がすことにより、粘着シート１９を施工箇所の適所に貼着させることができると共に、屋根用防水シート１の不使用時には剥離紙２０をそのまま粘着シート１９の裏面に設けておくことで、粘着シート１９の表面にゴミや塵などが付着して粘着性が低下するのを防止できる。
【００１９】
また、上記課題を解決するために本発明に係る屋根用防水シート１を用いた防水施工方法は、上述した屋根用防水シート１における折返し重合部４の長さ方向の一方の片側半部を、この片側半部に位置した折返し重合部４を展延しない状態で屋根下地６または建物外壁１６の平面部分に添わせて載設し、他方の片側半部を、この片側半部に位置した折返し重合部４を展延した状態で、瓦材８の上面の凹凸形状に沿わせて載設したことを特徴とする。これによると、屋根用防水シート１の折返し重合部４を適宜広げるといった簡単な作業で、平面部分に比べて表面積の大きい凹凸形状に合わせて屋根用防水シート１の形状変化を行わせ、平面部分から凹凸形状に亙って略同幅寸法の防水処理を施すようにできるから、屋根の防水処理施工を施工性良く行わせることができる。
【００２０】
【発明の実施の形態】
本発明の屋根用防水シート１は、図１に示すように、止水性を備えた可撓性シート２の片面に、変形可能で且つ自己保形性を備えた金属シート３を積層固定し、屋根用防水シート１の幅方向の途中に所定の間隔を隔てて折返し重合部４を並設して構成されたものである。
【００２１】
可撓性シート２は一定の耐候性や耐熱性を備えた加硫ゴム製または樹脂製のシートで構成される。たとえば、エチレン−プロピレン−ジェン三元共重合体（ＥＰＤＭ）とブチルゴムとをベースとし、加硫してシート状に成形した黒色ゴムシートが挙げられる。この可撓性シート２には、屋根用防水シート１の全体に柔軟性を持たせて、屋根用防水シート１の変形による不具合の抑制や、屋根用防水シート１の施工箇所への密着性を高めて防水性の向上に資するといった利点がある。なお、可撓性シート２の厚み寸法は０．４〜１．５ｍｍ（好ましくは０．５〜１．２ｍｍ）程度のものが好ましい。
【００２２】
また、金属シート３は一定の展延性や耐食性を備えた金属製のシートにて構成される。たとえば、アルミニウムシート、ステンレスシート等が挙げられる。この金属シート３には、塑性変形によって屋根用防水シート１に形状変形・保形性を持たせる以外にも、屋根用防水シート１の防火性能の向上に資する利点がある。なお、金属シート３の厚み寸法は０．０５〜０．２ｍｍ（好ましくは０．０８〜０．１２ｍｍ）程度が好ましい。更に言うと、この金属シート３としては、たとえば鉛板で構成してもよいが、雨水による劣化や環境面への配慮から上記アルミニウムシート等にて構成することが好ましい。なお、図示はしないが、金属シート３の一部に孔を設け、この孔によって金属シート３、ひいては屋根用防水シート１の変形の容易化を図るようにしてもよい。この場合、孔の大きさ、個数、設置箇所等は特に限定されるものではなく、施工箇所に応じて適宜設定されるものである。
【００２３】
また、折返し重合部４は、図１（ｂ）に示すように、屋根用防水シート１を山折りにした山折部４ａと屋根用防水シート１を谷折りにした谷折部４ｂとを連続しても設けると共に、山折部４ａを谷折部４ｂの上側に位置するように重合して側面視Ｚ字状に形成した部位である。なお、この折返し重合部４は上下に潰された形状とされており、しかして、この屋根用防水シート１は上記折返し重合部４を有しながらも、全体としては略平板状の矩形シートに形成されている。また、この折返し重合部４は屋根用防水シート１の幅方向に所定の間隔を隔てて複数並設されるが、本例の屋根用防水シート１では、各折返し重合部４の山折部４ａ及び谷折部４ｂが同一方向を向くように形成されている。そして、具体的には、並設する折返し重合部４間のピッチは５５ｍｍ、折返し重合部４の幅寸法は１５ｍｍに設定されている。
【００２４】
また、積層固定する可撓性シート２と金属シート３との間には可撓性シート２と金属シート３とを貼り合わせる接着剤層１８を設けている（図１１参照）。つまり、可撓性シート２と金属シート３とは接着剤で貼着されている。ここで、可撓性シート２を加硫ゴムシートで構成し、接着剤層１８を粘着性ブチルゴム層で構成するようにすると、積層する可撓性シート２と接着剤層１８との間では、加硫ゴムシートに粘着性ブチルゴム層の可塑剤が継続的に供給されるようになり、加硫ゴムシートで構成された可撓性シート２の耐侯性、柔軟性が継続的に向上でき、好ましい。ここで、粘着性ブチルゴム層はブチルゴムをシート状に成形したものである。なお、接着剤層１８の厚み寸法は０．６〜１．０ｍｍ（好ましくは０．６〜１．５ｍｍ）程度が好ましい。
【００２５】
この屋根用防水シート１は、後述するように折返し重合部４を開閉することで適宜形状変形を可能とするシートであり、この屋根用防水シート１の変形形状は自己保形性のある金属シート３によって保形、維持が為されるようになっている。ここで本例の屋根用防水シート１は、金属シート３が可撓性シート２の片面の全面に積層固定されて構成されており、この金属シート３によって屋根用防水シート１の全体部位で屋根用防水シート１の保形が行われるようにされている。しかしながら、最低、折返し重合部４の位置に金属シート３を設けてさえおけば、形状変形する折返し重合部４の保形を行うことができる。したがって、図示はしないが、屋根用防水シート１における折返し重合部４の部位にのみ金属シート３を可撓性シート２に積層固定し、それ以外の部位には金属シート３を設けないようにしてもよい。これによると金属シート３を省いた分、製造コスト（部材コスト）の低廉化を図り得るといった利点がある。なお、このような折返し重合部４の部位にのみ金属シート３を配設した屋根用防水シート１にあっても、屋根用防水シート１にはその幅方向に複数の折返し重合部４が並設されているので、屋根用防水シート１の幅方向の複数箇所で金属シート３による保形作用を屋根用防水シート１に働かせることになるから、屋根用防水シート１の全体形状の保形を行うことができるのは言うまでもない。
【００２６】
上述した屋根用防水シート１は、屋根に設けた天窓の近傍部位や、屋根と建物外壁との間のように、屋根にあって形状変化が生じる部位に防水処理を施すために使用される。以下には、屋根下地６に天窓７を取り付け、天窓７の周囲と屋根下地６との間に防水処理を施す場合の施工につき説明する。
【００２７】
まず、屋根下地６に天窓７を取り付けるには、図２，３のように、傾斜した平面である屋根下地６に設けられた天窓用の開口５を上方から塞ぐように天窓７を配置させるようにして行う。なお、本例の屋根は瓦材８を葺設して仕上げるタイプのものであり、瓦材８を葺設させる瓦桟９が、天窓７の周囲を除く屋根下地６の部位に、水下側から水上側に複数本並べて固定されている。そして、天窓７と屋根下地６との間に防水処理を施す前に、天窓７より下方に位置する瓦桟９にはあらかじめ瓦材８を葺設しておく。
【００２８】
この天窓７の周囲（水下側、水上側、両けらば側）と屋根下地６との間に施す防水処理にあっては、本例では、天窓７の周囲（水下側、水上側、両けらば側）の屋根下地６にそれぞれ水切り部材１０を配設すると共に、水下側の水切り部材１０ａとあらかじめ葺設しておいた瓦材８との間に屋根用防水シート１を配設することで行われる。
【００２９】
なお、各水切り部材１０は、平板部１１の内縁及び外縁に亙ってそれぞれ立上り部１２を設けた屈曲板状のものであり、内縁立上り部１２ａを天窓７の外縁に添わせると共に外縁立上り部１２ｂを瓦桟９の端面に添わせ、平板部１１を屋根下地６上に載せるようにして配設される。ここで、添設される各水切り部材１０の内縁立上り部１２ａと天窓７との間には、両者に亙る防水テープ１３（図５）が表面から貼着されて水密構造が仕上げられる。また、これら水切り部材１０同士の接続部位にあっては、上方位置に位置する水切り部材１０の下面に下方位置に位置する水切り部材１０の上面を重ねて配置し、積層した上記水切り部材１０，１０の間に防水テープやコーキング材などを介在させて防水処理を施している。
【００３０】
また、水下側の水切り部材１０ａとあらかじめ葺設された瓦材８との間には屋根用防水シート１を配設するが、具体的には、屋根の水上−水下方向に折返し重合部４の長手方向を合わせて屋根用防水シート１を屋根に近接させ、折返し重合部４の長手方向の一端部分（屋根用防水シート１の上半部）を該水切り部材１０ａと屋根下地６との間に挿入し、折返し重合部４の長手方向の他端部分（屋根用防水シート１の下半部）を瓦材８の上面に被せるように配設させる。このように屋根下地６と瓦材８とに間に配設した屋根用防水シート１によって、水下側の水切り部材１０ａから屋根用防水シート１上を介して瓦材８に雨水を流下させ得るようにしている。
【００３１】
なお、水下側の水切り部材１０ａの下端に水切り部材１０ａの下面に添わせて上方に折り返したフック状のはぜ継ぎ部１４を形成しておけば、屋根用防水シート１の上端を該はぜ継ぎ部１４に引掛け係止でき、屋根用防水シート１をズレなく配置できて好ましい（図５）。また、屋根下地６の面と瓦材８の上面との間には少なからず高さ方向のギャップがあるので、屋根下地６の面から瓦材８の上面をなだらかに連続させる傾斜面１５ａを備えたスペーサ部材１５を、屋根下地６と瓦材８との間に配設してもよい（図５）。
【００３２】
ところで、瓦材８にはその上面に波形状などの凹凸形状を施したものがしばしば用いられるのであるが、その場合にも、防水構造上、屋根用防水シート１は瓦材８の上面の凹凸形状に沿わせて載設される必要がある。このような場合、本例の屋根用防水シート１にあっては、屋根下地６などの平面部分に添わせて載設する部位にあたる折返し重合部４はそのまま閉じた状態にし、瓦材８の上面を被覆する部位にあたる折返し重合部４を幅方向に適宜広げるようにし、この折返し重合部４を広げたことで得られた屋根用防水シート１の幅方向に延伸した部位を、凹凸形状に添わせて瓦材８の上面に載設させる。
【００３３】
具体的に、図２のように、屋根用防水シート１を屋根下地６上に配設する前に、予め所定部位の折返し重合部４を広げ、屋根用防水シート１の所定部位を瓦材８の上面の凹凸形状に沿わせ得る凹凸曲面形状に変形させておき、この変形された屋根用防水シート１を屋根下地６上に配設して行わせてもよいし、一旦、屋根用防水シート１を屋根下地６上に配設した後に、瓦材８の上面に被さる部位の折返し重合部４を広げて、この部位を瓦材８の上面の凹凸形状に合わせて変形させて瓦材８の上面に添わせるように行わせてもよい。
【００３４】
ここで、屋根用防水シート１を瓦材８の上面の凹凸形状に添わせて変形させるには、屋根用防水シート１の形状を瓦材８の上面の凹凸形状に馴染ませるため、瓦材８の上面に載設した屋根用防水シート１を木槌などで軽く叩いて整形することも好ましい。なお、このときには、接着剤層１８の端縁位置を、可撓性シート２及び金属シート３の端縁位置よりも内方に位置することが好ましい。これによると、施工箇所の表面形状に屋根用防水シート１の形状を合わせるべく木槌などで屋根用防水シート１を叩いた場合に、可撓性シート２と金属シート３との間から接着剤層１８が外方にはみ出て瓦材８の上面などの施工箇所などに付着し、該施工箇所を汚してしまう、といった事態を無くすることができるのである。更に言うと、屋根用防水シート１を瓦材８の上面の凹凸形状に合わせて変形させる際には、変形時に生じる衝撃が可塑性シート２や接着剤層１８にて緩衝されるので、金属シート３に亀裂等を生じさせにくくできるといった利点もある。
【００３５】
このように、本例の屋根用防水シート１では、上面に凹凸形状が施された瓦材８であっても、瓦材８に被さる部位の折返し重合部４を広げることで、折返し重合部４を広げた分屋根用防水シート１の幅寸法を大きくでき、平面形状より表面積が大となった凹凸形状に添わせて載設させても、屋根下地６などの平面を被覆する部分と瓦材８などの凹凸形状を被覆する部分との被覆幅を略同一寸法にすることが可能にされている。つまり、図３には屋根用防水シート１の平面被覆幅はＨで示し、屋根用防水シート１の凹凸形状被覆幅はｈで示しているが、上述したように屋根用防水シート１は適所で折返し重合部４を広げるようにしたことで、Ｈ＝ｈの関係を有するようにできたのである。更に言うと、本例の屋根用防水シート１は、特に、水切り部材１０のフック部１４に係合したりして屋根用防水シート１の一端が規制された状態にある場合にも、この規制された屋根用防水シート１の一端近傍以外の折返し重合部４を広げることで、規制された部位の形状はそのままの状態で、屋根用防水シート１の適宜部位の形状変形を部分的に行わせることができるといった利点も有しているのである。したがって、本例では、従来技術のように平面被覆部分の幅寸法を凹凸形状被覆部分で確保できないといった事態を無くすることができ、屋根の形状にかかわらず所定の幅寸法での防水処理を確実に施し得るようにされているのである。
【００３６】
屋根用防水シート１を瓦材８の上面の凹凸形状に添わせて載設した後には、屋根用防水シート１と瓦材８との隙間にコーキング材を充填するなどの防水処理を施すことも好ましい。そして、上記屋根用防水シート１を用いて天窓７の周囲に防水処理を施した後には、図４のように、全ての瓦桟９の上に瓦材８を葺設し、屋根の仕上げが行われる。
【００３７】
本例では、天窓７の水上側には直ぐに瓦材８を葺設したものを示したが、降雪地域など建物立地条件や屋根勾配などの条件によっては、天窓７の水上側の瓦材８上を流下する雨水を天窓７上に伝わせて流下させるようなジャンプ台１７を天窓７の水上側の位置に配設することも好ましい（図１２参照）。また、本例では、天窓７の水下側での防水処理に屋根用防水シート１を用いた例を示したが、この屋根用防水シート１は、天窓７のケラバ側に施す防水処理に用いることも好ましく、また図６のように建物外壁１６と瓦材８との境界部分の防水処理に用いることも好ましい。
【００３８】
また、上記には本例の屋根用防水シート１の屋根の形状にかかわらず所定幅寸法の防水処理を行い得る利点につき説明したが、この屋根用防水シート１にあっては、上記折返し重合部４を有しながらも全体としては略平板状の矩形シートに形成されていることから、屋根用防水シート１の厚み方向の嵩が小さく維持されており、しかして、屋根用防水シート１を搬送したり保管したりする際などに安定的に積層できるといった利点も有している。なお、このとき、金属シート３の端縁位置を、可撓性シート２の端縁位置と同等若しくは内方位置に位置させた屋根用防水シート１であることが好ましい。これによると、屋根用防水シート１の端縁に金属シート３が突出することがなくて、屋根用防水シート１の取扱いにかかる安全性を高めることができるのである。
【００３９】
また、この屋根用防水シート１は、折返し重合部４を広げることでその幅寸法を広げることができたものであるが、図７（ａ）のように折返し重合部４を閉じた状態の屋根用防水シート１の幅寸法をＬ_１とし、図７（ｂ）のように側面視で略一直線状になるように折返し重合部４を完全に開いた状態の屋根用防水シート１の幅寸法をＬ_２としたとき、Ｌ_２＞Ｌ_１×（π／２）の関係を有するようにすることが好ましい。これは、建物に一般的に用いられる瓦材８にあっては、図８のように、凹凸形状を上面に施した瓦材８における幅方向の表面距離Ｘ_２は、上面が平板状の瓦材８における幅方向の表面距離（瓦材８の幅寸法Ｘ_１と同等）と比べて、Ｘ_２＜Ｘ_１×（π／２）の関係を有するものであり、しかして、Ｌ_２＞Ｌ_１×（π／２）の関係を有するように屋根用防水シート１に折返し重合部４を設けると、凹凸形状を上面に施した一般的な瓦材８に対して汎用できるといった利点が得られるのである。
【００４０】
更に言うと、本例では、可撓性シート２の下方に金属シート３が位置する状態で屋根用防水シート１を屋根に配設している。しかして、可撓性シート２が外方に露出されて金属シートが外方に露出されない状態にされており、屋根用防水シートが雨水に晒されたとしても金属シートに雨水が当たることがなくて、金属成分が雨水に溶け出すことが防止されている。これによって周囲の環境の汚染の防止が図られている。なお、反対に、屋根の外観に素材感、色彩等を合わせるべく、金属シート３を可撓性シート２の上方に位置するように屋根用防水シート１を屋根に配設してもよい。この場合には金属シート３を雨水などに反応しにくいイオン化傾向の低い金属で構成させることが好ましい。また、屋根用防水シート１の強度等を考慮して、図９のように可撓性シート２の表裏両面に金属シート３を積層固定して屋根用防水シート１を構成しても、また金属シート３の表裏両面に可撓性シート２を積層固定して屋根用防水シート１を構成してもよい。
【００４１】
また、図１０乃至図１２には本発明の実施の形態の他例を示す。先の実施の形態の例と同様部位には同符合を付して説明を省き、異なる部分を説明するものとする。この例は、屋根用防水シート１の裏面の少なくとも一部に粘着シート１９を積層固定し、この粘着シート１９の裏面に剥離紙２０を設けた例である。なお、本例では、屋根用防水シート１の表面側には可撓性シート２が、裏面側には金属シート３が位置しており、粘着シート１９は金属シート３の裏面の略全面に亙って貼着されている。
【００４２】
粘着シート１９は、粘着性を有するシートであって、たとえばブチルゴムシートにて構成される。なお、この粘着シート１９の厚み寸法は、１．５ｍｍ以上（好ましくは２．０ｍｍ以上）に設定される。この粘着シート１９によると、図１２のように屋根用防水シート１を施工箇所に配設したとき、粘着シート１９にて屋根用防水シート１を施工箇所に密着して貼着できるだけでなく、粘着シート１９がシール材の役割を果たし、先の実施の形態の例で行っている瓦材８と屋根用防水シート１との間へのコーキング材の充填施工を無くすることができるのである。つまり、屋根用防水シート１の配設施工の施工性を向上できる利点を有しているのである。なお、図１２中の２１は、水切り部材１０と屋根用防水シート１との連結部位を屋根下地６に固定する釘やビスを挿通させる挿通孔である。
【００４３】
更に言うと、この粘着シート１９の厚みが２ｍｍ以上有ると、上面に多少の塵等が存在している瓦材８に屋根用防水シート１を貼着させても、瓦材８と屋根用防水シート１との間を完全にシールすることができると共に、屋根用防水シート１を木槌などで叩いて瓦材８の上面の凹凸形状に合わせるよう変形させた場合にも、それに追従して粘着シート１９が延伸するのでシール性の低下が生じないようにできて好ましい。なお、粘着シート１９の厚みが１．５ｍｍ未満の場合では、屋根用防水シート１を瓦材８の上面の凹凸形状に合わせるよう変形させた場合に、該変形時に生じる衝撃の粘着シート１９による緩衝作用が不充分で、金属シート３に亀裂などを生じさせる恐れを有している。つまり、粘着シート１９の厚みが１．５ｍｍ以上あれば、該変形時に生じる衝撃を粘着シート１９で有効に緩衝できて、金属シート３に亀裂などの発生を防止できるのである。
【００４４】
また、粘着シート１９の裏面に貼着された剥離紙２０にあっては、屋根用防水シート１の使用時（配設施工時）にはじめて粘着シート１９から剥がされるものであって、屋根用防水シート１の不使用時にはそのまま粘着シート１９の裏面に設けておくものであり、施工箇所に貼着させる粘着シート１９の裏面にゴミや塵などが付着することを防止し、粘着シート１９の粘着性の低下を防止できる利点を有している。無論、剥離紙２０は、屋根用防水シート１の配設施工時の適宜のタイミングで粘着シート１９から剥がされるのであるから、適宜のタイミングで粘着シート１９の粘着力を働かせることができ、屋根用防水シート１が予期せぬ場所に付着してしまう事態を避けることができ、施工性の向上に資するといった利点も有するものである。
【００４５】
なお、上述したいずれの実施の形態の例の屋根用防水シート１も、並設した折返し重合部４の山折部４ａ及び谷折部４ｂが同一方向を向くように形成されているが、図１３に示す本発明の時しの形態の更に他例における屋根用防水シート１のように、隣接する折返し重合部４の山折部４ａ及び谷折部４ｂが異なる方向を向くように構成してもよい。この屋根用防水シート１においても、折返し重合部４の形状以外は、先の諸例の屋根用防水シート１と同様の構成、機能を有している。瓦材８の上面の凹凸形状によっては、本例の折返し重合部４のパターンの屋根用防水シート１が該凹凸形状に容易に形状を合わせて変形できる場合もあり、そのような場合には屋根用防水シート１の配設施工にかかる施工性の向上が図られるものである。
【００４６】
【発明の効果】
上記のように本発明の請求項１記載の発明にあっては、止水性を備えた可撓性シートに、変形可能で且つ自己保形性を備えた金属シートを積層固定した屋根用防水シートにおいて、屋根用防水シートの幅方向の途中に該幅方向と略直交する方向に亙って折返し重合部を形成し、少なくとも該折返し重合部では可撓性シートと金属シートとを積層したので、屋根用防水シートにおける折返し重合部の長さ方向の一方の片側半部を屋根下地などの平面部分に添わせて載設すると共に、屋根用防水シートにおける該長さ方向の他方の片側半部を波形状など凹凸形状が施された瓦材の上面に添わせて載設する際には、平面形状を被覆する部位では折返し重合部はそのままにし、凹凸形状を被覆する部位では折返し重合部を広げるようにすることで、平面形状より表面積が大となる凹凸形状に合わせて屋根用防水シートの適所を幅方向に広げることができ、しかして、屋根用防水シートで施す防水処理の幅寸法を平面被覆部分と凹凸形状被覆部分とにかかわらず略同一寸法にできる。したがって、従来技術のように平面被覆部分の幅寸法を凹凸形状被覆部分では確保できないといった事態を無くすることができ、確実に屋根に防水処理を施し得るようにできる。また、少なくとも折返し重合部に自己保形性のある金属シートを位置して設けたので、折返し重合部の形状変化を保形でき、ひいては形状変化した屋根用防水シートの保形を確保できる。
【００４７】
また請求項２記載の発明にあっては、請求項１の効果に加え、折返し重合部を、間隔を隔てて複数並設したので、折返し重合部を広げて行う屋根用防水シートの幅方向への延伸を全体としてより大きくできると共に、屋根用防水シートの保形を複数箇所の金属シートで行うことで屋根用防水シートの全体形状をより保形し易くできる。
【００４８】
また請求項３記載の発明にあっては、請求項１の効果に加え、可撓性シートの片面の全面に亙って金属シートを積層固定したので、屋根用防水シートの保形を全面に亙る金属シートで行うことで、屋根用防水シートの全体形状をより精密に保形し易くできる。
【００４９】
また請求項４記載の発明にあっては、請求項１の効果に加え、折返し重合部に位置する可撓性シートの部位のみに金属シートを積層固定したので、折返し重合部の形状変形を保形できるから屋根用防水シートの保形を確保できることに加え、折返し重合部以外の金属シートを省いて屋根用防水シートのコスト低廉化を図ることができる。
【００５０】
また請求項５記載の発明にあっては、請求項１の効果に加え、折返し重合部を、山折部と谷折部とを連続して設けると共に、山折部を谷折部の上側に位置するように重合して形成したので、屋根用防水シートを幅方向に引っ張ることで山折部と谷折部とが引き伸ばされるから、簡単な施工で施工箇所の表面形状に合わせて屋根用防水シートを載設できる。
【００５１】
また請求項６記載の発明にあっては、請求項１の効果に加え、可撓性シートを、加硫ゴム製または樹脂製のシートで構成したので、可撓性シートを外方に露出せる表面に配置した際には、金属シートが外方に露出されず、屋根用防水シートが雨水に晒されたとしても金属シートに雨水が当たることがなくて金属成分が雨水に溶け出すことを防止できて周囲の環境の汚染を防止できる。
【００５２】
また請求項８記載の発明にあっては、請求項１の効果に加え、金属シートの端縁位置を、可撓性シートの端縁位置と同等若しくは内方位置に位置したので、屋根用防水シートの端縁に金属シートが突出することがなくて、屋根用防水シートの取扱いにかかる安全性を高めることができる。
【００５３】
また請求項９記載の発明にあっては、請求項１の効果に加え、積層固定した可撓性シートと金属シートとの間に、可撓性シートと金属シートとを貼り合わせる接着剤層を設けたことも好ましい。これによると、可撓性シートと金属シートとを容易に積層固定できる。
【００５４】
また請求項１０記載の発明にあっては、請求項９の効果に加え、接着剤層の端縁位置を、可撓性シート及び金属シートの端縁位置よりも内方に位置したので、施工箇所の表面形状に屋根用防水シートの形状を合わせるべく木槌などで屋根用防水シートをたたいた場合に、可撓性シートと金属シートとの間から接着剤層が外方にはみ出て施工箇所などに付着し、施工箇所を汚してしまうといった事態を無くすることができる。
【００５５】
また請求項１１記載の発明にあっては、請求項９の効果に加え、可撓性シートを、厚さ０．４〜１．５ｍｍの加硫ゴムシートで構成すると共に、接着剤層を、厚さ０．５〜２．０ｍｍの粘着性ブチルゴム層で構成したので、積層した加硫ゴムシートと粘着性ブチルゴム層との間では加硫ゴムシートに粘着性ブチルゴム層の可塑剤が継続的に供給されるようになり、加硫ゴムシートで構成した可撓性シートの耐侯性、柔軟性を継続的に向上できる。
【００５６】
また請求項１２記載の発明にあっては、請求項１の効果に加え、屋根用防水シートの裏面の少なくとも一部に粘着シートを積層固定したので、粘着シートを施工箇所に貼着させることにより、屋根用防水シートを粘着シートによるシールを伴って施工箇所に固定させることができると共に、粘着シートにて屋根用防水シートの変形時の衝撃を緩衝できて金属シートの破損防止に資することができる。
【００５７】
また請求項１３記載の発明にあっては、請求項１２の効果に加え、粘着シートの裏面に剥離紙を設けたので、屋根用防水シートの使用時には剥離紙を剥がすことにより、粘着シートを施工箇所の適所に貼着させることができると共に、屋根用防水シートの不使用時には剥離紙をそのまま粘着シートの裏面に設けておくことで、粘着シートの表面にゴミや塵などが付着して粘着性が低下するのを防止できる。すなわち、屋根用防水シートを狙いの箇所に確実に配設できると共に、屋根用防水シートの使用時まで粘着シートの粘着力を維持できる。
【００５８】
また、請求項１４記載の発明にあっては、請求項１乃至１３のいずれかの屋根用防水シートにおける折返し重合部の長さ方向の一方の片側半部を、この片側半部に位置した折返し重合部を展延しない状態で屋根下地または建物外壁の平面部分に添わせて載設し、他方の片側半部を、この片側半部に位置した折返し重合部を展延した状態で、瓦材の上面の凹凸形状に沿わせて載設したので、屋根用防水シートの折返し重合部を適宜広げるといった簡単な作業で、平面部分に比べて表面積の大きい凹凸形状に合わせて屋根用防水シートの形状変化を行わせ、平面部分から凹凸形状に亙って略同幅寸法の防水処理を施すようにできるから、屋根の防水処理施工を施工性良く行わせることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の例の屋根用防水シートであり、（ａ）は全体斜視図であり、（ｂ）は（ａ）の要部の側面図である。
【図２】同上の天窓近傍の防水処理施工の一例を説明し、瓦材の上面の凹凸形状に添わせるべく、屋根用防水シートの折返し重合部を適宜広げた状態を示す斜視図である。
【図３】同上の防水処理施工後の天窓近傍の斜視図である。
【図４】同上の屋根の仕上げ施工後の天窓近傍の斜視図である。
【図５】同上の仕上げ施工後の天窓近傍の要部側面図である。
【図６】同上の屋根用防水シートを建物外壁と瓦材との間に配設した例を示す概略側面図である。
【図７】同上の屋根用防水シートであって、（ａ）は折返し重合部を閉じた状態の斜視図であり、（ｂ）は折返し重合部を全て広げた状態の斜視図である。
【図８】上面に凹凸形状を施した瓦材を示す斜視図である。
【図９】同上の屋根用防水シートの他例を示す要部側面図である。
【図１０】本発明の実施の形態の他例の屋根用防水シートの斜視図である。
【図１１】図１０のＢ−Ｂ線断面図である。
【図１２】同上の屋根用防水シートを用いて防水処理が為された天窓近傍の斜視図である。
【図１３】本発明の実施の形態の更に他例の屋根用防水シートの斜視図である。
【図１４】従来技術の例の屋根用防水シートを屋根に近接させる状態を示す斜視図である。
【図１５】同上の従来技術の例の屋根用防水シートを凹凸形状を施した瓦材の上面に添わせて載設した状態を示す斜視図である。
【符号の説明】
１屋根用防水シート
２可撓性シート
３金属シート
４折返し重合部
４ａ山折部
４ｂ谷折部
６屋根下地
８瓦材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a waterproof sheet for a roof and a waterproofing method using the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a portion of a roof where a shape change occurs, such as a roof near a skylight or a connection portion between a roof and an outer wall, a roof is used to prevent rainwater from entering the building from the shape change portion. A waterproofing sheet for a roof or the like is laid over the portion where the shape has been changed to perform a waterproofing treatment. 14 and 15 show a waterproof structure on a roof near a skylight (for example, see Patent Document 1). The roof material is provided with a skylight 7 in an opening 5 provided in a roof base 6, a draining member 10 is provided around the roof window 7, and a roofing member 6 and a tile material laid on the roof base 6. The waterproof treatment is performed by disposing the roof waterproof sheet 1 between the roof waterproof sheet 8 and the waterproof sheet 8. More specifically, the upper half of the roof tarpaulin 1 is mounted on the roof foundation 6 so as to penetrate into the lower surface of the draining member 10, and the lower half of the roof tarpaulin 1 is placed on the tile material 8. Has been established. Here, the roof waterproof sheet 1 stacked and mounted on the tile material 8 has a watertight structure between the roof waterproof sheet 1 and the tile material 8. Let me. In addition, 9 in the figure is a tile bar on which the tile material 8 is placed.
[0003]
[Patent Document 1]
Japanese Patent No. 3087154
[0004]
[Problems to be solved by the invention]
By the way, in the case of the tile material 8 to be laid on the roof, a material having a corrugated shape or the like on its upper surface is often used. In the case where the top surface of such a tile material 8 is not flat but has irregularities such as wavy shapes, the surface area is increased by the irregularities as compared with a flat one. Thus, as described above, the upper half of the roof tarpaulin 1 is placed on a flat surface such as the roof foundation 6 and the lower half of the roof tarpaulin 1 is aligned with the uneven portion on the upper surface of the tile 8. When placed together, the lower half of the roof waterproof sheet 1 has a smaller width dimension than the upper half (H> h). Therefore, there is a possibility that the entire upper surface of the targeted tile material 8 cannot be covered, which may adversely affect the waterproof treatment.
[0005]
The present invention has been made in view of the above-mentioned points, and is intended for a roof that can secure a predetermined covering width and perform a reliable waterproofing process even when stacked and placed according to the upper surface shape of a tile material. It is an object to provide a waterproof sheet and a waterproof construction method using the same.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a waterproof sheet for a roof according to the present invention includes a deformable and self-retaining metal sheet 3 laminated and fixed on a flexible sheet 2 having a waterproof property. A folded portion 4 is formed in the width direction of the waterproof sheet 1 in a direction substantially perpendicular to the width direction. At least in the folded portion 4, the flexible sheet 2 and the metal sheet 3 are laminated. It is characterized. According to this, one half of one side in the length direction of the folded back portion 4 of the roof waterproof sheet 1 is placed along with a flat portion such as the roof base 6 and the length of the roof waterproof sheet 1 is also set. When the other half of the direction is placed along with the upper surface of the tile material 8 having a corrugated shape such as a wavy shape, the folded portion 4 is left as it is at the portion covering the planar shape, By spreading the folded portion 4 in the area where the roof is covered, the roof waterproof sheet 1 can be spread in the width direction in accordance with the uneven shape having a larger surface area than the planar shape. The covering width of the waterproof sheet 1 can be made substantially the same irrespective of the plane covering portion and the uneven covering portion. Therefore, it is possible to eliminate a situation in which the width dimension of the flat covering portion cannot be secured in the uneven covering portion as in the related art, and it is possible to reliably perform the waterproof treatment on the roof. In addition, since the metal sheet 3 having self-retaining property is provided at least in the folded-over portion 4, the shape change of the folded-over portion 4 can be maintained, and the shape of the roof waterproof sheet 1 having the changed shape can be maintained. Can be secured.
[0007]
It is also preferable that a plurality of the folded portions 4 are arranged side by side at intervals. According to this, the stretching in the width direction of the roof waterproof sheet 1 performed by expanding the folded back portion 4 can be made larger as a whole, and the shape of the roof waterproof sheet 1 is preserved by a plurality of metal sheets 3. The overall shape of the roof waterproof sheet 1 can be more easily maintained.
[0008]
It is also preferable that the metal sheet 3 is laminated and fixed over one entire surface of the flexible sheet 2. According to this, the shape of the roof waterproof sheet 1 is preserved with the metal sheet 3 over the entire surface, so that the overall shape of the roof waterproof sheet 1 can be more easily maintained more precisely.
[0009]
Further, it is also preferable that the metal sheet 3 is laminated and fixed only at the portion of the flexible sheet 2 located at the folded back portion 4. According to this, the shape deformation of the folded back portion 4 can be maintained, so that the shape of the roof waterproof sheet 1 can be maintained, and the metal sheet 3 other than the folded back portion 4 is omitted to reduce the cost of the roof waterproof sheet 1. Can be achieved.
[0010]
Further, it is also preferable that the folded overlap portion 4 is formed by continuously providing the mountain-folded portion 4a and the valley-folded portion 4b and overlapping the mountain-folded portion 4a so as to be located above the valley-folded portion 4b. According to this, the mountain fold 4a and the valley fold 4b are stretched by pulling the roof tarpaulin 1 in the width direction, so that the roof tarpaulin 1 is placed according to the surface shape of the construction site by simple construction. it can.
[0011]
It is also preferable that the flexible sheet 2 is formed of a vulcanized rubber or resin sheet. According to this, when the flexible sheet 2 is arranged on the surface that is exposed to the outside, the metal sheet 3 is not exposed to the outside, and even if the roof waterproof sheet 1 is exposed to rainwater, the metal sheet 3 is not exposed. The metal component can be prevented from dissolving into the rainwater without being exposed to the rainwater, and the pollution of the surrounding environment can be prevented.
[0012]
Further, it is also preferable that the metal sheet 3 is formed of an aluminum sheet having a thickness of 0.05 to 0.2 mm.
[0013]
It is also preferable that the edge position of the metal sheet 3 is equal to or inward of the edge position of the flexible sheet 2. According to this, the metal sheet 3 does not protrude from the edge of the roof waterproof sheet 1, and the safety in handling the roof waterproof sheet 1 can be improved.
[0014]
It is also preferable that an adhesive layer 18 for bonding the flexible sheet 2 and the metal sheet 3 is provided between the flexible sheet 2 and the metal sheet 3 which are laminated and fixed. According to this, the flexible sheet 2 and the metal sheet 3 can be easily laminated and fixed.
[0015]
Further, it is also preferable that the edge position of the adhesive layer 18 is located inside the edge positions of the flexible sheet 2 and the metal sheet 3. According to this, when the roof tarpaulin 1 is hit with a mallet or the like to match the shape of the roof tarpaulin 1 to the surface shape of the construction site, the flexible sheet 2 and the metal sheet 3 are bonded from each other. A situation in which the agent layer 18 protrudes outward and adheres to a construction site or the like can be eliminated.
[0016]
Further, the flexible sheet 2 is constituted by a vulcanized rubber sheet having a thickness of 0.4 to 1.5 mm, and the adhesive layer 18 is constituted by an adhesive butyl rubber layer having a thickness of 0.5 to 2.0 mm. It is also preferable to do so. According to this, between the laminated vulcanized rubber sheet and the adhesive butyl rubber layer, the plasticizer of the adhesive butyl rubber layer was continuously supplied to the vulcanized rubber sheet, and the vulcanized rubber sheet was formed. The weather resistance and flexibility of the flexible sheet 2 can be continuously improved.
[0017]
It is also preferable that the adhesive sheet 19 is laminated and fixed on at least a part of the back surface of the roof waterproof sheet 1. According to this, by attaching the pressure-sensitive adhesive sheet 19 to the construction location, the roof waterproof sheet 1 can be fixed to the construction location with the seal by the pressure-sensitive adhesive sheet 19, and the roof waterproof sheet 1 The shock at the time of deformation of 1 can be buffered, which can contribute to prevention of breakage of the metal sheet 3.
[0018]
It is also preferable that a release paper 20 is provided on the back surface of the adhesive sheet 19. According to this, the peeling paper 20 is peeled off when the roof waterproof sheet 1 is used, so that the pressure-sensitive adhesive sheet 19 can be adhered to an appropriate place of the construction site, and when the roof waterproof sheet 1 is not used, the release paper 20 is removed. By providing the pressure-sensitive adhesive sheet 19 on the rear surface as it is, it is possible to prevent adhesion of dirt and dust on the surface of the pressure-sensitive adhesive sheet 19 to reduce the adhesiveness.
[0019]
In addition, in order to solve the above-mentioned problem, the waterproofing construction method using the roofing waterproof sheet 1 according to the present invention includes: The folded back portion 4 located on one side half is placed along with the roof base 6 or the flat portion of the building outer wall 16 in a non-spreading state, and the other half on the other side is placed on the one side half. It is characterized in that the overlapping portion 4 is placed along the uneven shape on the upper surface of the tile material 8 in a state where the overlapping portion 4 is spread. According to this, the shape of the roof tarpaulin 1 is changed in accordance with the uneven shape having a larger surface area than that of the flat portion by a simple operation such as appropriately expanding the folded back portion 4 of the roof tarpaulin 1. Since the waterproof treatment having substantially the same width can be performed over the uneven shape from above, the waterproof treatment of the roof can be performed with good workability.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, a waterproof sheet 1 for a roof of the present invention has a deformable and self-retaining metal sheet 3 laminated and fixed to one surface of a flexible sheet 2 having a water-stopping property, The roof overlap sheet 1 is configured such that folded back portions 4 are juxtaposed at predetermined intervals in the widthwise direction of the roof waterproof sheet 1.
[0021]
The flexible sheet 2 is made of a vulcanized rubber or resin sheet having a certain level of weather resistance and heat resistance. For example, a black rubber sheet formed from an ethylene-propylene-gen terpolymer (EPDM) and butyl rubber as a base and vulcanized to form a sheet may be used. The flexible sheet 2 is provided with flexibility for the entire roof tarpaulin 1 so as to suppress the problems caused by the deformation of the roof tarpaulin 1 and to improve the adhesion of the roof tarpaulin 1 to the construction site. There is an advantage that it raises and contributes to improvement of waterproofness. The thickness of the flexible sheet 2 is preferably about 0.4 to 1.5 mm (preferably 0.5 to 1.2 mm).
[0022]
The metal sheet 3 is formed of a metal sheet having a certain spreadability and corrosion resistance. For example, an aluminum sheet, a stainless steel sheet and the like can be mentioned. The metal sheet 3 has an advantage that it contributes to the improvement of the fire protection performance of the roof waterproof sheet 1 in addition to giving the roof waterproof sheet 1 a shape deformation and shape retention by plastic deformation. In addition, the thickness dimension of the metal sheet 3 is preferably about 0.05 to 0.2 mm (preferably 0.08 to 0.12 mm). More specifically, the metal sheet 3 may be made of, for example, a lead plate, but is preferably made of the above-mentioned aluminum sheet or the like in consideration of deterioration due to rainwater and environmental considerations. Although not shown, a hole may be provided in a part of the metal sheet 3 so that the metal sheet 3 and the roof waterproof sheet 1 can be easily deformed by the hole. In this case, the size, number, location, and the like of the holes are not particularly limited, and are appropriately set according to the construction location.
[0023]
As shown in FIG. 1 (b), the folded back portion 4 continuously includes a mountain fold 4a in which the roof waterproof sheet 1 is mountain-folded and a valley fold 4b in which the roof waterproof sheet 1 is valley-folded. This is a portion formed by overlapping the mountain fold 4a so as to be positioned above the valley fold 4b and forming a Z-shape in side view. Note that the folded back portion 4 has a shape that is crushed up and down. Thus, the roof waterproof sheet 1 has a substantially flat rectangular sheet as a whole, even though it has the folded back portion 4. Is formed. Further, a plurality of the folded back portions 4 are arranged side by side at predetermined intervals in the width direction of the roof waterproof sheet 1, but in the roof waterproof sheet 1 of the present embodiment, the mountain folded portions 4a and the The valley folds 4b are formed so as to face in the same direction. More specifically, the pitch between the folded portions 4 is set to 55 mm, and the width of the folded portions 4 is set to 15 mm.
[0024]
Further, an adhesive layer 18 for bonding the flexible sheet 2 and the metal sheet 3 is provided between the flexible sheet 2 and the metal sheet 3 to be laminated and fixed (see FIG. 11). That is, the flexible sheet 2 and the metal sheet 3 are adhered with an adhesive. Here, if the flexible sheet 2 is formed of a vulcanized rubber sheet and the adhesive layer 18 is formed of an adhesive butyl rubber layer, the laminated flexible sheet 2 and the adhesive layer 18 have The plasticizer of the adhesive butyl rubber layer is continuously supplied to the vulcanized rubber sheet, and the weather resistance and flexibility of the flexible sheet 2 composed of the vulcanized rubber sheet can be continuously improved, which is preferable. . Here, the adhesive butyl rubber layer is formed by molding butyl rubber into a sheet. The thickness of the adhesive layer 18 is preferably about 0.6 to 1.0 mm (preferably 0.6 to 1.5 mm).
[0025]
The roof waterproof sheet 1 is a sheet whose shape can be appropriately deformed by opening and closing the folded portion 4 as described later, and the roof waterproof sheet 1 has a self-shaping metal sheet. The shape and the shape are maintained by 3. Here, the roof waterproof sheet 1 of the present embodiment is configured such that the metal sheet 3 is laminated and fixed on the entire surface of one side of the flexible sheet 2, and the roof waterproof sheet 1 is entirely covered by the metal sheet 3. The shape of the waterproof sheet 1 is preserved. However, as long as the metal sheet 3 is provided at least at the position of the folded portion 4, the shape of the folded portion 4 that is deformed can be maintained. Therefore, although not shown, the metal sheet 3 is laminated and fixed to the flexible sheet 2 only at the portion of the folded back portion 4 of the roof waterproof sheet 1, and the metal sheet 3 is not provided at other portions. Is also good. According to this, there is an advantage that the manufacturing cost (member cost) can be reduced because the metal sheet 3 is omitted. In addition, even in the case of the roof waterproof sheet 1 in which the metal sheet 3 is provided only at the site of the folded section 4, a plurality of folded sections 4 are juxtaposed in the width direction of the roof waterproof sheet 1. As a result, the shape retaining effect of the metal sheet 3 is applied to the roof waterproof sheet 1 at a plurality of locations in the width direction of the roof waterproof sheet 1, so that the entire shape of the roof waterproof sheet 1 is preserved. It goes without saying that you can do it.
[0026]
The above-described roof waterproof sheet 1 is used for waterproofing a portion of a roof where a shape change occurs, such as a portion near a skylight provided on the roof or between a roof and an outer wall of a building. Hereinafter, a description will be given of a case where the skylight 7 is attached to the roof base 6 and a waterproof process is performed between the periphery of the skylight 7 and the roof base 6.
[0027]
First, in order to attach the skylight 7 to the roof foundation 6, as shown in FIGS. 2 and 3, the skylight 7 is arranged so as to close the roof opening 5 provided on the inclined floor roof 6 from above. And do it. The roof of the present example is of a type in which the tile material 8 is laid and finished. The tile bar 9 for laying the tile material 8 is provided under the roof base 6 excluding the periphery of the skylight 7 under the water. And a plurality of them are fixed on the water side. Then, before waterproofing is performed between the skylight 7 and the roof foundation 6, a tile material 8 that is located below the skylight 7 is previously laid with a tile material 8.
[0028]
In the waterproofing process performed between the periphery of the skylight 7 (underwater, above the water, both sides) and the roof base 6, in this example, around the skylight 7 (underwater, above the water, A draining member 10 is disposed on the roof base 6 on both sides (both sides), and a roof tarpaulin 1 is disposed between the draining member 10a on the underwater side and the tile material 8 previously laid. It is done by doing.
[0029]
Each draining member 10 is a bent plate having a rising portion 12 provided on the inner edge and the outer edge of the flat plate portion 11. The inner edge rising portion 12 a is attached to the outer edge of the skylight 7 and the outer edge rising portion. 12 b is attached to the end face of the tile bar 9, and the flat plate portion 11 is placed on the roof foundation 6. Here, a waterproof tape 13 (FIG. 5) extending between the inner edge rising portion 12a of each draining member 10 and the skylight 7 is attached from the surface to complete the watertight structure. In addition, at the connection site of these drainers 10, the upper surface of the drainer 10 located at the lower position is superimposed on the lower surface of the drainer 10 located at the upper position, and the drainers 10 and 10 are stacked. Waterproof tape or caulking material is interposed between them for waterproofing.
[0030]
In addition, the roof waterproof sheet 1 is provided between the draining member 10a on the underwater side and the tile material 8 that has been previously laid. Specifically, the roof is folded in the water-downstream direction of the roof. 4, the roof waterproof sheet 1 is brought close to the roof, and one end in the longitudinal direction of the folded back portion 4 (the upper half of the roof waterproof sheet 1) is formed between the draining member 10a and the roof foundation 6. It is disposed so that the other end portion in the longitudinal direction of the folded back portion 4 (the lower half portion of the roof waterproof sheet 1) is placed on the upper surface of the tile material 8. By the roof waterproof sheet 1 disposed between the roof foundation 6 and the tile material 8 in this manner, it is possible to cause rainwater to flow down from the draining member 10a on the underwater side to the tile material 8 via the roof waterproof sheet 1. Like that.
[0031]
In addition, if the hook-shaped seam part 14 which turned up along with the lower surface of the draining member 10a is formed at the lower end of the draining member 10a on the drain side, the upper end of the roof waterproof sheet 1 will be It is preferable because it can be hooked and locked to the spliced portion 14 and the roof waterproof sheet 1 can be arranged without displacement (FIG. 5). Further, since there is not a small gap in the height direction between the surface of the roof base material 6 and the upper surface of the tile material 8, an inclined surface 15a is provided to smoothly continue the upper surface of the tile material 8 from the surface of the roof base material 6. The spacer member 15 may be provided between the roof foundation 6 and the tile material 8 (FIG. 5).
[0032]
By the way, the roofing sheet 8 is often used with a corrugated shape or the like provided on the upper surface thereof. In this case, however, the roof waterproof sheet 1 is also provided with the unevenness on the upper surface of the roofing material 8 due to the waterproof structure. It must be mounted along the shape. In such a case, in the roof waterproof sheet 1 of the present embodiment, the folded back portion 4 corresponding to a portion to be placed along with a flat portion such as the roof base 6 is kept closed, and the upper surface of the tile material 8 is closed. The folded back portion 4 corresponding to the portion to be covered is appropriately widened in the width direction, and the portion of the roof waterproof sheet 1 obtained by spreading the folded back portion 4 extending in the width direction is attached to the uneven shape. On the upper surface of the tile material 8.
[0033]
Specifically, as shown in FIG. 2, before disposing the roof tarpaulin 1 on the roof foundation 6, the folded portion 4 of the predetermined portion is spread in advance, and the predetermined portion of the roof tarpaulin 1 is The roof waterproof sheet 1 may be deformed into a concave and convex curved surface shape that can conform to the concave and convex shape of the upper surface, and the deformed roof waterproof sheet 1 may be disposed on the roof foundation 6 and may be temporarily performed. After the tiles 1 are disposed on the roof foundation 6, the folded back portion 4 of the portion that covers the upper surface of the tile material 8 is widened, and this portion is deformed according to the uneven shape of the upper surface of the tile material 8 to deform the tile material 8. It may be performed so as to be attached to the upper surface.
[0034]
Here, in order to adapt the shape of the roof waterproof sheet 1 to the uneven shape of the upper surface of the tile material 8, the roof waterproof sheet 1 is deformed along with the uneven shape of the upper surface of the tile material 8. It is also preferable to lightly hit the roof waterproof sheet 1 placed on the upper surface with a mallet or the like to shape it. At this time, it is preferable that the edge position of the adhesive layer 18 be located inside the edge positions of the flexible sheet 2 and the metal sheet 3. According to this, when the roof tarpaulin 1 is hit with a mallet or the like to match the shape of the roof tarpaulin 1 to the surface shape of the construction site, the adhesive is applied between the flexible sheet 2 and the metal sheet 3. It is possible to eliminate a situation in which the layer 18 protrudes outward and adheres to a construction site such as the upper surface of the tile material 8 and soils the construction site. More specifically, when the roof waterproof sheet 1 is deformed in accordance with the uneven shape of the upper surface of the tile material 8, the impact generated during the deformation is buffered by the plastic sheet 2 and the adhesive layer 18, so that the metal sheet 3 There is also an advantage that cracks and the like can be hardly generated.
[0035]
As described above, in the roof waterproof sheet 1 of the present example, even if the tile material 8 has an uneven shape on the upper surface, the folded overlap portion 4 of the portion to be covered with the tile material 8 is widened, so that the folded overlap portion 4 is formed. The width of the roof waterproof sheet 1 can be increased by the width of the roof, and even if the roof waterproof sheet 1 is mounted along the uneven shape having a larger surface area than the planar shape, the roof covering 6 and other parts covering the flat surface and the tile material It is possible to make the width of the covering with the portion covering the uneven shape such as 8 approximately the same. That is, in FIG. 3, the planar covering width of the roof tarpaulin 1 is indicated by H, and the uneven covering width of the roof tarpaulin 1 is indicated by h, but as described above, the roof tarpaulin 1 is in place. By expanding the folded portion 4, the relationship of H = h could be obtained. More specifically, the roof waterproofing sheet 1 of the present embodiment is particularly restricted even when one end of the roofing waterproofing sheet 1 is regulated by engaging with the hook portion 14 of the drainer 10. By expanding the folded portion 4 other than the vicinity of one end of the roof waterproof sheet 1, the shape of the appropriate portion of the roof waterproof sheet 1 is partially changed while the shape of the restricted portion is maintained as it is. It also has the advantage of being able to do so. Therefore, in this example, it is possible to eliminate the situation that the width dimension of the flat covering portion cannot be secured by the uneven covering portion unlike the prior art, and it is possible to reliably perform the waterproof treatment at the predetermined width dimension regardless of the roof shape. It can be applied to
[0036]
After the roof waterproof sheet 1 is placed along with the uneven shape on the upper surface of the tile material 8, waterproof treatment such as filling a gap between the roof waterproof sheet 1 and the tile material 8 with a caulking material may be performed. preferable. Then, after waterproofing is performed around the skylight 7 using the roof waterproof sheet 1, as shown in FIG. 4, a tile material 8 is laid on all the tile bars 9 to finish the roof. Done.
[0037]
In this example, the tile material 8 is laid immediately above the skylight 7 above the tile material 8. However, depending on the building location conditions such as a snowfall area and the roof gradient, etc., the tile material 8 above the skylight 7 may be used. It is also preferable to dispose a jump table 17 at a position above the skylight 7 so that rainwater flowing down the skylight 7 can be transmitted to the skylight 7 and flow down (see FIG. 12). In this example, the roof waterproof sheet 1 is used for waterproofing the skylight 7 under the water, but the roof waterproof sheet 1 is used for waterproofing on the keraba side of the skylight 7. It is also preferable to use for waterproofing the boundary between the building outer wall 16 and the tile material 8 as shown in FIG.
[0038]
In addition, the advantage that the waterproofing sheet 1 of the present embodiment can perform waterproofing of a predetermined width regardless of the shape of the roof has been described above. 4, the overall thickness of the roof tarpaulin 1 in the thickness direction is kept small, so that the roof tarpaulin 1 is conveyed. It also has the advantage that it can be stably laminated when it is stored or stored. In addition, at this time, it is preferable that the edge position of the metal sheet 3 is the roof waterproof sheet 1 which is located at the same or inward position as the edge position of the flexible sheet 2. According to this, the metal sheet 3 does not protrude from the edge of the roof waterproof sheet 1, and the safety of handling the roof waterproof sheet 1 can be improved.
[0039]
In addition, although the width of the roof waterproof sheet 1 can be increased by expanding the folded portion 4, as shown in FIG. 7 (a), the roof having the folded portion 4 closed can be obtained. Width of waterproof sheet 1 ₁ The width dimension of the roof waterproof sheet 1 in a state where the folded portion 4 is completely opened so as to be substantially straight as viewed from the side as shown in FIG. ₂ And L ₂ > L ₁ It is preferable to have a relationship of × (π / 2). This is because, in the case of the tile material 8 generally used for a building, as shown in FIG. ₂ Is the surface distance in the width direction of the tile material 8 having a flat upper surface (the width dimension X of the tile material 8). ₁ X) ₂ <X ₁ × (π / 2), where L ₂ > L ₁ When the folded back portion 4 is provided on the roof waterproof sheet 1 so as to have a relationship of × (π / 2), there is obtained an advantage that it can be applied to a general tile material 8 having an uneven surface on the upper surface. is there.
[0040]
Furthermore, in this example, the roof waterproof sheet 1 is arranged on the roof in a state where the metal sheet 3 is located below the flexible sheet 2. Thus, the flexible sheet 2 is exposed to the outside and the metal sheet is not exposed to the outside. Even if the roof waterproof sheet is exposed to rainwater, rainwater does not hit the metal sheet. Thus, the metal component is prevented from being dissolved in the rainwater. As a result, pollution of the surrounding environment is prevented. Conversely, the roof waterproof sheet 1 may be provided on the roof such that the metal sheet 3 is positioned above the flexible sheet 2 in order to match the texture, color, and the like to the appearance of the roof. In this case, it is preferable that the metal sheet 3 is made of a metal having a low ionization tendency that is difficult to react with rainwater or the like. In consideration of the strength and the like of the roof tarpaulin 1, the roof tarpaulin 1 may be formed by laminating and fixing the metal sheets 3 on the front and back surfaces of the flexible sheet 2 as shown in FIG. The flexible sheet 2 may be laminated and fixed on both the front and back surfaces of the sheet 3 to constitute the roof waterproof sheet 1.
[0041]
10 to 12 show other examples of the embodiment of the present invention. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted, and different parts will be described. In this example, an adhesive sheet 19 is laminated and fixed on at least a part of the back surface of the roof waterproof sheet 1, and a release paper 20 is provided on the back surface of the adhesive sheet 19. In this example, the flexible sheet 2 is located on the front side of the waterproof sheet 1 for a roof, and the metal sheet 3 is located on the back side, and the adhesive sheet 19 covers substantially the entire back surface of the metal sheet 3. It is stuck.
[0042]
The adhesive sheet 19 is an adhesive sheet, and is formed of, for example, a butyl rubber sheet. The thickness of the pressure-sensitive adhesive sheet 19 is set to 1.5 mm or more (preferably 2.0 mm or more). According to the adhesive sheet 19, when the waterproof sheet 1 for a roof is disposed at a construction site as shown in FIG. The sheet 19 plays a role of a seal material, and the filling work of the caulking material between the tile material 8 and the roof tarpaulin 1 performed in the example of the above embodiment can be eliminated. That is, there is an advantage that the workability of the installation work of the roof waterproof sheet 1 can be improved. In addition, 21 in FIG. 12 is an insertion hole for inserting a nail or a screw for fixing a connecting portion between the drainer 10 and the roof waterproof sheet 1 to the roof foundation 6.
[0043]
More specifically, if the thickness of the pressure-sensitive adhesive sheet 19 is 2 mm or more, even if the roof waterproof sheet 1 is adhered to the tile material 8 having some dust or the like on the upper surface, the tile material 8 and the roof waterproof In addition to being able to completely seal the space between the roofing sheet 1 and the roofing waterproof sheet 1 by using a mallet or the like to deform the roofing waterproof sheet 1 so as to conform to the uneven shape of the upper surface of the tile material 8, the adhesive is followed. Since the sheet 19 is stretched, the sealing property is preferably prevented from lowering. When the thickness of the pressure-sensitive adhesive sheet 19 is less than 1.5 mm, when the roof waterproof sheet 1 is deformed so as to conform to the uneven shape of the upper surface of the tile material 8, the shock generated by the deformation is cushioned by the pressure-sensitive adhesive sheet 19. The function is insufficient, and there is a possibility that the metal sheet 3 may be cracked. In other words, if the thickness of the pressure-sensitive adhesive sheet 19 is 1.5 mm or more, the shock generated during the deformation can be effectively buffered by the pressure-sensitive adhesive sheet 19, and the occurrence of cracks or the like in the metal sheet 3 can be prevented.
[0044]
The release paper 20 adhered to the back surface of the pressure-sensitive adhesive sheet 19 is peeled off from the pressure-sensitive adhesive sheet 19 only when the roof waterproof sheet 1 is used (at the time of installation and construction). When the sheet 1 is not used, it is provided on the back surface of the adhesive sheet 19 as it is, preventing dust and dirt from adhering to the back surface of the adhesive sheet 19 to be adhered to a construction site, and making the adhesive sheet 19 Has the advantage of being able to prevent a decrease in Needless to say, since the release paper 20 is peeled off from the adhesive sheet 19 at an appropriate timing when the waterproofing sheet 1 for roof is installed, the adhesive force of the adhesive sheet 19 can be exerted at an appropriate timing, and It is possible to avoid a situation in which the waterproof sheet 1 adheres to an unexpected place, and there is an advantage that it contributes to improvement of workability.
[0045]
Note that the roof waterproof sheet 1 of any of the above-described embodiments is also formed such that the mountain fold portions 4a and the valley fold portions 4b of the juxtaposed folded portions 4 face in the same direction. As in the roof waterproofing sheet 1 in still another example of the time mode of the present invention shown in FIG. 1, the mountain folded portion 4a and the valley folded portion 4b of the adjacent folded portion 4 may be configured to face different directions. . This roof waterproof sheet 1 also has the same configuration and functions as the roof waterproof sheet 1 of the above-mentioned various examples, except for the shape of the folded back portion 4. Depending on the uneven shape of the upper surface of the tile material 8, the roof waterproof sheet 1 of the pattern of the folded back portion 4 of the present example may be easily deformed by adjusting the shape to the uneven shape. The workability related to the installation work of the waterproof sheet 1 is improved.
[0046]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, a waterproof sheet for a roof in which a deformable and self-retaining metal sheet is laminated and fixed on a water-stopping flexible sheet. In the, in the middle of the width direction of the roof waterproof sheet, a folded overlap portion is formed in a direction substantially orthogonal to the width direction, and at least the folded overlap portion is formed by laminating a flexible sheet and a metal sheet. One half in the length direction of the folded back portion of the roof tarpaulin is placed along with a flat portion such as a roof base, and the other half in the length direction of the roof tarpaulin is attached to the other half. When installing along the top surface of a tile material with a corrugated shape such as a wavy shape, leave the folded overlap portion as it is at the portion that covers the planar shape, and widen the folded portion at the portion that covers the uneven shape By doing so, The roof tarpaulin can be widened in the width direction according to the uneven shape where the surface area is larger than the shape. Approximately the same size regardless of Therefore, it is possible to eliminate a situation in which the width dimension of the flat covering portion cannot be secured in the uneven covering portion as in the related art, and it is possible to reliably perform the waterproof treatment on the roof. Further, since the metal sheet having a self-retaining property is provided at least in the folded-over portion, the shape change of the folded-over portion can be maintained, and the shape of the roof waterproof sheet having the changed shape can be secured.
[0047]
According to the second aspect of the present invention, in addition to the effect of the first aspect, a plurality of folded back portions are arranged side by side at an interval, so that the folded back portion is widened in the width direction of the roof waterproof sheet. Of the roof waterproof sheet can be made larger as a whole, and the shape of the roof waterproof sheet can be maintained at a plurality of metal sheets, so that the overall shape of the roof waterproof sheet can be more easily maintained.
[0048]
According to the third aspect of the invention, in addition to the effect of the first aspect, the metal sheet is laminated and fixed over one entire surface of the flexible sheet. By using the metal sheet over the entire area, the entire shape of the roof waterproof sheet can be easily maintained more precisely.
[0049]
According to the fourth aspect of the invention, in addition to the effect of the first aspect, the metal sheet is laminated and fixed only on the portion of the flexible sheet located at the folded back portion, so that the shape deformation of the folded back portion is maintained. Since the shape can be formed, the shape of the waterproof sheet for roof can be maintained, and the cost of the waterproof sheet for roof can be reduced by omitting the metal sheet other than the folded back portion.
[0050]
In the invention according to claim 5, in addition to the effect of claim 1, the folded overlap portion is provided with the mountain fold portion and the valley fold portion continuously, and the mountain fold portion is located above the valley fold portion. Since the roof waterproof sheet is stretched in the width direction by stretching the roof waterproof sheet in the width direction, the mountain fold and valley fold are stretched, so the roof waterproof sheet is mounted according to the surface shape of the construction location with simple construction Can be set up.
[0051]
According to the invention of claim 6, in addition to the effect of claim 1, since the flexible sheet is made of a vulcanized rubber or resin sheet, the flexible sheet is exposed to the outside. When placed on the surface, the metal sheet is not exposed to the outside, preventing rainwater from hitting the metal sheet even if the roof tarpaulin is exposed to rainwater, preventing the metal components from dissolving into the rainwater As a result, pollution of the surrounding environment can be prevented.
[0052]
In the invention according to claim 8, in addition to the effect of claim 1, the edge position of the metal sheet is located at the same or inward position as the edge position of the flexible sheet, so that the waterproof for roof is provided. Since the metal sheet does not protrude from the edge of the sheet, it is possible to enhance the safety in handling the roof waterproof sheet.
[0053]
According to the ninth aspect of the present invention, in addition to the effect of the first aspect, an adhesive layer for bonding the flexible sheet and the metal sheet is provided between the laminated and fixed flexible sheet and the metal sheet. It is also preferable to provide them. According to this, the flexible sheet and the metal sheet can be easily laminated and fixed.
[0054]
According to the tenth aspect of the present invention, in addition to the effect of the ninth aspect, the edge position of the adhesive layer is located inside the edge positions of the flexible sheet and the metal sheet. When the roof tarpaulin is hit with a mallet or the like to match the shape of the roof tarpaulin to the surface shape of the location, the adhesive layer protrudes outward from between the flexible sheet and the metal sheet and is constructed It is possible to eliminate a situation in which it adheres to a location or the like and soils a construction location.
[0055]
In the invention according to claim 11, in addition to the effect of claim 9, the flexible sheet is made of a vulcanized rubber sheet having a thickness of 0.4 to 1.5 mm, and the adhesive layer is Since it is composed of an adhesive butyl rubber layer having a thickness of 0.5 to 2.0 mm, the plasticizer of the adhesive butyl rubber layer is continuously applied to the vulcanized rubber sheet between the laminated vulcanized rubber sheet and the adhesive butyl rubber layer. As a result, the weather resistance and flexibility of the flexible sheet made of the vulcanized rubber sheet can be continuously improved.
[0056]
According to the invention of claim 12, in addition to the effect of claim 1, the adhesive sheet is laminated and fixed on at least a part of the back surface of the waterproofing sheet for a roof, so that the adhesive sheet is attached to a construction site. In addition to being able to fix the roof waterproof sheet to the construction site with a seal by the adhesive sheet, the adhesive sheet can buffer the impact of the deformation of the roof waterproof sheet and contribute to preventing damage to the metal sheet. .
[0057]
According to the invention of claim 13, in addition to the effect of claim 12, since the release paper is provided on the back surface of the adhesive sheet, the release paper is peeled off when the waterproof sheet for roof is used, so that the adhesive sheet is installed. It can be stuck to the right place, and when the roof tarpaulin is not used, the release paper is provided on the back of the adhesive sheet as it is. Can be prevented from decreasing. In other words, the waterproof sheet for roof can be reliably disposed at the intended location, and the adhesive strength of the adhesive sheet can be maintained until the use of the waterproof sheet for roof.
[0058]
Also, in the invention according to claim 14, one half of the folded back portion of the waterproof sheet for roof according to any one of claims 1 to 13 in the length direction is located at the one half. With the overlapped portion not being spread, it is placed along the roof base or the flat part of the building outer wall, and the other half of the other side is tiled with the folded overlapped portion located on this one side half extended. The roof tarpaulin was placed along the top surface irregularities, so the simple work of appropriately expanding the folded part of the roof tarpaulin, and the shape of the roof tarpaulin according to the irregular surface shape with a large surface area compared to the flat part Since the waterproofing process can be performed so as to have substantially the same width from the flat portion to the uneven shape, waterproofing of the roof can be performed with good workability.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a roof waterproof sheet according to an embodiment of the present invention, wherein (a) is an overall perspective view and (b) is a side view of a main part of (a).
FIG. 2 is a perspective view illustrating an example of a waterproofing process in the vicinity of the skylight and showing a state in which a folded back portion of a roof waterproof sheet is appropriately expanded so as to conform to an uneven shape on an upper surface of a tile material.
FIG. 3 is a perspective view of the vicinity of a skylight after a waterproofing process is performed.
FIG. 4 is a perspective view showing the vicinity of a skylight after finishing the roof.
FIG. 5 is a side view of a main part near a skylight after finishing work according to the embodiment.
FIG. 6 is a schematic side view showing an example in which the same roof waterproof sheet is provided between an outer wall of a building and a tile material.
7A and 7B are perspective views of the same roof waterproof sheet, in which FIG. 7A is a perspective view in a state where a folded back portion is closed, and FIG. 7B is a perspective view in a state in which the folded back portion is entirely opened.
FIG. 8 is a perspective view showing a tile material having an uneven shape on the upper surface.
FIG. 9 is a side view of a main part showing another example of the same roof waterproof sheet.
FIG. 10 is a perspective view of a roof tarpaulin according to another embodiment of the present invention.
FIG. 11 is a sectional view taken along line BB of FIG. 10;
FIG. 12 is a perspective view of the vicinity of a skylight that has been waterproofed using the roof waterproof sheet of the above.
FIG. 13 is a perspective view of a roof waterproof sheet according to yet another example of the embodiment of the present invention.
FIG. 14 is a perspective view showing a state in which the roof tarpaulin of the example of the prior art is brought close to the roof.
FIG. 15 is a perspective view showing a state in which the roof waterproof sheet according to the prior art example is placed along with the upper surface of a tile material having an uneven shape.
[Explanation of symbols]
1 Roof tarpaulin
2 Flexible sheet
3 Metal sheet
4 Folded polymerization section
4a Yamaoribe
4b Tanioribe
6 Roof foundation
8 tile materials

Claims

In a waterproofing sheet for a roof in which a deformable and self-retaining metal sheet is laminated and fixed on a flexible sheet having a waterproof property, the roof waterproofing sheet is substantially perpendicular to the widthwise direction in the widthwise direction of the roofing waterproofing sheet. A waterproof sheet for a roof, wherein a folded overlap portion is formed in a direction in which a flexible sheet and a metal sheet are laminated at least in the folded overlap portion.

The roof waterproofing sheet according to claim 1, wherein a plurality of folded back portions are arranged in parallel at intervals.

The waterproof sheet for a roof according to claim 1, wherein a metal sheet is laminated and fixed over one entire surface of the flexible sheet.

2. The waterproof sheet for a roof according to claim 1, wherein the metal sheet is laminated and fixed only on the portion of the flexible sheet located at the folded back portion.

2. The waterproofing for a roof according to claim 1, wherein the folded overlap portion is formed by continuously providing the mountain fold portion and the valley fold portion and overlapping the mountain fold portion so as to be located above the valley fold portion. Sheet.

The roof waterproof sheet according to claim 1, wherein the flexible sheet is made of a sheet made of vulcanized rubber or resin.

The roof waterproof sheet according to claim 1, wherein the metal sheet is made of an aluminum sheet having a thickness of 0.05 to 0.2 mm.

The roof waterproof sheet according to claim 1, wherein an edge position of the metal sheet is equal to or inward of the edge position of the flexible sheet.

The roof waterproofing sheet according to claim 1, wherein an adhesive layer for bonding the flexible sheet and the metal sheet is provided between the laminated and fixed flexible sheet and the metal sheet.

The roof waterproof sheet according to claim 9, wherein the edge position of the adhesive layer is located inside the edge positions of the flexible sheet and the metal sheet.

The flexible sheet is constituted by a vulcanized rubber sheet having a thickness of 0.4 to 1.5 mm, and the adhesive layer is constituted by an adhesive butyl rubber layer having a thickness of 0.5 to 2.0 mm. The waterproof sheet for roof according to claim 9, wherein

The roof waterproof sheet according to claim 1, wherein an adhesive sheet is laminated and fixed on at least a part of the back surface of the roof waterproof sheet.

13. The waterproof sheet for a roof according to claim 12, wherein a release paper is provided on a back surface of the adhesive sheet.

14. A roof base or an outer wall of a building of the roof waterproof sheet according to any one of claims 1 to 13, wherein one half of the folded back portion in the length direction of the folded back portion is not extended. That the other half of the other side is placed along with the uneven shape of the upper surface of the tile material in a state where the folded back portion located on the one side half is extended. A waterproof construction method using a waterproof sheet for roof.