JP4272311B2 - Roof insulation and waterproof structure - Google Patents

Description

【数２】

【数３】

【数４】

【数５】

【００４１】
ω_９ :試験日数９日の試験片重量
ω_１７:試験日数１７日の試験片重量
ω_３４:試験日数３４日の試験片重量
ω_５２:試験日数５２日の試験片重量
ω_６７:試験日数６７日の試験片重量
δ_ｎ−１:標準偏差
【００４２】
比較例１
建築後１５年を経過したコンクリート建物の断熱効果が悪いので、屋上の一部を剥がして、屋上断熱防水構造を調査した結果、図４に示すような、押さえコンクリート層／断熱層（厚さ３ｃｍの発泡倍率３０倍の発泡ポリスチレン製の断熱材）／防水層／屋根コンクリートスラブ層から構成されており、断熱層中には４０体積％の雨水が溜まっていた。
一方、この屋上断熱防水構造として用いた厚さ３ｃｍの発泡ポリスチレン製の断熱層（発泡倍率３０倍品）の水分蓄積率を、上記実施例１の断熱層（発泡倍率３０倍品）と透水性材料層との積層体（１５ｍｍ脱気パイプ付き）の「水分蓄積の測定法」と同様にして測定した。
その結果を図８に示す。
【００４３】
【発明の効果】
このような本発明の屋上断熱防水構造は、断熱層上に透水性材料層が形成されているために、冬季において室内側の温度が高く、室外側の温度が低くなり、防水層の上の雨水が蒸発して水蒸気となって、断熱材の中を透過し、この水蒸気が透水性材料層の外気に近いところで外気温により冷やされて凝縮水となっても、透水性材料層が排水溝に導くための導水路としての役割も果たすことができるので、断熱層に雨水が蓄積されて、断熱材としての役割を果たすことができなくなることはなく、長期間に亘って断熱性能が低下することがない。
【図面の簡単な説明】
【図１】図１は、本発明実施例の屋上断熱防水構造の断面図である。
【図２】図２は、図１の屋上断熱防水構造の屋上排水路の排水口の縦型流路との接続部分の断面図である。
【図３】図３は、本発明の他の実施例の屋上断熱防水構造の断面図である。
【図４】図４は、公知の屋上断熱防水構造の断面図である。
【図５】図５は、水分蓄積の測定法に用いる試験片の形状を表す。
【図６】図６は、水分蓄積の測定法に用いる試験片を恒温恒湿水槽に取り付け方法に関する説明図である。
【図７】図７は、試験片の測定サイクルを表す説明図である。
【図８】図８は、水分蓄積量の経時変化の測定結果を表す図である。
【符号の説明】
１ 屋上断熱防水構造
２ 屋根コンクリートスラブ
２ａ 均しコンクリート
３ 防水層
４ 断熱層
４' 脚付き断熱材層
４ａ 段部
４ｂ 脚部
４ｃ 支承部材
５ 透水性材料層
６ 押さえコンクリート層
７ 積層構造体
８ 雨水
９ 導水路
１０ 目地
１１ 屋上排水路
１１ａ 受け皿
１２ 排水口
１２ａ 上蓋
１２ｂ 中蓋
１３ 室内側
１４ 室外側
１５ キャップ
１５ａ 溝部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof heat insulating waterproof structure in which heat insulating performance does not deteriorate over a long period of time.
[0002]
[Prior art]
Conventionally, the heat insulating waterproof structure on the roof of a concrete building has a waterproof material laid on a roof concrete slab, as shown in FIG. 4, and a heat insulating material is constructed thereon, and further concrete is placed thereon. By using a roof heat insulating waterproof structure comprising a laminated structure comprising a roof concrete slab layer / waterproof layer / heat insulating layer / pressing concrete layer, the roof was waterproofed from rainwater and prevented from the heat of sunlight.
[0003]
[Problems to be solved by the invention]
However, such a heat insulating waterproof structure on the roof does not cause any problems at the beginning of construction, but the rainwater that penetrates the concrete and leaks from the joints to the concrete after the years has passed. It has been found that the phenomenon occurs when the layer absorbs water and the heat insulation performance is significantly reduced.
[0004]
In general, expanded polystyrene insulation is water-repellent, so it does not allow rainwater to pass through, and it is considered that moisture does not accumulate in the insulation. The performance was not expected to decline.
[0005]
[Means for Solving the Problems]
The present inventor has conducted extensive research in view of the above phenomenon, and as a result, such a decrease in heat insulation performance has penetrated the concrete layer or has entered from the gap between the concrete and the joint. When rainwater accumulates on the waterproof layer through the joints of the heat insulating material, and in such a state, when the indoor temperature is high and the outdoor temperature is low, the liquid water However, when the moisture on the waterproof layer heated from the indoor side becomes water vapor, it becomes possible to permeate through the heat insulating material, and try to get out into the outside air. Since the temperature near the upper surface of the material is close to the outside temperature, the water vapor is cooled here, resulting in condensed water in the heat insulating material, and the knowledge that water has accumulated in the heat insulating material To achieve the present invention Than is.
[0006]
That is, the roof heat insulating waterproof structure of the present invention has a laminated structure composed of a waterproof layer laid on the roof concrete slab, a heat insulating layer formed on the waterproof layer, and a pressing concrete layer laid on the heat insulating layer. In the roof heat insulating waterproof structure formed by forming a water permeable material layer for guiding rainwater or condensed water to the roof drainage channel between the heat insulating layer and the pressing concrete layer, the water permeable material layer is It is a water-permeable heat insulating material including a particle bonded body having fine pores in which the surfaces of the foamed resin particles are bonded by adhesive or heat fusion .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
[I] Roof insulation and waterproof structure
(1) Laminated structure As shown in FIG. 1, the roof heat insulating waterproof structure 1 of the present invention includes a waterproof layer 3 laid on a roof concrete slab layer 2, a heat insulating layer 4 formed on the waterproof layer 3, It is formed of a laminated structure 7 basically composed of a water permeable material layer 5 laid on the heat insulating layer 4 and a pressing concrete layer 6 formed on the water permeable material layer 5.
[0008]
(2) Configuration layer
(a) Roof concrete slab layer The roof concrete slab layer 2 constituting the roof heat insulating waterproof structure 1 of the present invention is generally a layer composed of the roof concrete slab 2 used in concrete buildings, and this roof concrete slab layer No. 2 usually places a formwork on a construction site and places concrete on it before placing concrete.
[0009]
(b) Waterproof layer As the waterproof layer 3 constituting the roof heat-insulating waterproof structure 1 of the present invention, asphalt waterproof, sheet waterproof, modified asphalt waterproof, paint film waterproof, which generally prevent the penetration of rainwater on the roof of a building, A mortar waterproofing etc. can be mentioned.
[0010]
Specifically, the waterproofing material 3 is, for example, a base paper made of wool and cotton fibers, mixed with paper fibers and the like, and treated with asphalt to attach waterproof paper with several layers of asphalt. Asphalt felt infiltrated with asphalt, and roofing in which this asphalt felt is further coated with asphalt.
For these waterproof layers, cotton cloth, linen cloth, asbestos cloth, metal net or the like can be used for reinforcement.
The waterproof layer 3 is basically composed of the waterproof material 3, but is generally composed of an asphalt layer having a thickness of 3 to 10 mm, preferably 4 to 6 mm.
[0011]
(c) Heat Insulating Layer The heat insulating layer 4 constituting the roof heat insulating waterproof structure of the present invention is a synthetic resin foam, and specifically, a styrene resin such as a styrene resin foam or an ethylene / styrene copolymer resin foam. Examples include olefin resin foams such as resin foams, ethylene resin foams, and propylene resin foams, or synthetic resin foams such as styrene-modified olefin resin foams and rigid urethane resin foams. it can.
[0012]
The synthetic resin foam is generally obtained by foaming a synthetic resin with a foaming ratio of 25 to 80 times, preferably 25 to 40 times, and usually has a density of 0.0125 to 0.05 g / cm ³ , preferably 0. It is preferable to use a foam having a high closed cell ratio of 0.025 to 0.04 g / cm ³ .
The shape of the heat insulating layer 4 is basically a flat plate as shown in FIG. 1, but it is overlapped so that a gap is formed when laying on the waterproof layer 3 and the heat insulating efficiency is not lowered. A stepped portion 4a serving as a mating portion can be formed.
A foamed plastic heat insulating material 4 laid on the waterproof layer 3 is generally 20 to 100 mm in thickness, preferably 25 to 80 mm.
[0013]
In addition, in order to drain the rainwater 8 accumulated between the waterproof layer 3 and the heat insulating layer 4, the height is generally 3 to 30 mm, preferably 7 to 15 mm below the heat insulating layer 4. The leg heat insulating material 4 ′ in which the water conduit 9 through which the rainwater 8 flows is formed by attaching the leg portion 4 b, or the water-permeable material 4 described later is laid under the heat insulating layer 4, It is preferable to form a water conduit 9 in which a support member 4 c for forming a gap is formed between the waterproof layer 3 and the waterproof layer 3.
[0014]
(d) Water-permeable material layer The water-permeable material layer 5 constituting the roof heat insulating waterproof structure of the present invention is the most important material in the present invention, and the rainwater 8 and the pressed concrete layer 6 that have penetrated the pressed concrete layer 6 are used. Rainwater 8 leaking from the gap between the joint 10 and the drainage 12 of the rooftop drainage channel 11, and the rainwater on the waterproof layer 3 is generated in the winter when the temperature of the indoor side 13 is high and the temperature of the outdoor side 14 is low. When the water vapor passes through the heat insulating material 4 and reaches a position close to the outside air of the water permeable material layer 5, the water vapor is cooled by the outside air temperature to become condensed water. It plays the role of the water conduit 9 for guiding the rainwater that has become to the drainage groove 11.
[0015]
As a material for the water permeable material layer 5 can be such role, basically, the surface of the resin particles of the various shapes, in the presence of an adhesive or by fusion by heating, partial For example, a porous body or the like in which the fine pores 5c communicate with each other can be exemplified by joining them together or bundling fibers such as woven fabrics and nonwoven fabrics.
[0016]
As a specific example of such a water-permeable material layer 5, a particle bonded body in which the surfaces of foamed resin particles 5a having a spherical shape or a twig shape or a bowl shape are partially joined by an adhesive 5b. Or a bonded particle body in which the surfaces of foamed resin particles 5a having different shapes such as a spherical shape or a twig shape or a saddle shape are partially bonded by heating, or a woven fabric, a nonwoven fabric or gravel as an adhesive. Examples thereof include those hardened with a soft polyurethane foam and the like.
[0017]
Among these, in the present invention, as a constituent material of the water-permeable material layer, a particle bonded body in which the surfaces of the foamed resin particles 5a are partially bonded in the presence of the adhesive 5b or by fusion by heating is used . It is an essential component requirement. Therefore, the water-permeable material layer 5 has fine pores 5c and has heat insulation properties. The water-permeable material layer 5 is preferably provided with air permeability in order to discharge moisture to the outside.
[0018]
The foamed resin particles 5a are synthetic resin foams obtained by foaming synthetic resin particles. Specifically, styrene resin foams such as styrene resin foams and ethylene / styrene copolymer resin foams, ethylene Examples thereof include olefin resin foams such as resin foams and propylene resin foams, styrene-modified olefin resin foams, and rigid urethane resin foams.
[0019]
The synthetic resin foam is generally obtained by foaming a synthetic resin with a foaming ratio of 25 to 80 times, preferably 40 to 60 times, and usually has a density of 0.0125 to 0.04 g / cm ³ , preferably 0. It is preferable to use a foam having a high closed cell ratio of 0.017 to 0.025 g / cm ³ .
[0020]
As the adhesive 5b, a known adhesive that can adhere the foamed resin particles 5a can be used. For example, a water-soluble or water-dispersed adhesive and a solvent-type adhesive can be used. it can. Specific examples include urethane resin adhesives, vinyl acetate adhesives, acrylic adhesives, epoxy adhesives, silicon adhesives, asphalt adhesives, cement adhesives, and the like.
In the case of the water-permeable material layer 5 composed of the foamed resinous particles 5a and the adhesive 5b, generally 1 to 3 parts by weight of the foamed resinous particles 5a and 1 to 3 parts by weight, preferably 1.5 parts of the adhesive 5b. Those mixed at a ratio of ˜2.5 parts by weight are used.
[0021]
As the woven fabric and nonwoven fabric, specifically, a natural fabric such as cotton and wool, a woven fabric woven from a fiber such as a synthetic fiber such as nylon fiber, polyester fiber and acrylic fiber, or the above fiber is woven. Non-compressed nonwoven fabrics and the like can be mentioned.
The thickness of the water permeable material layer 5 is generally 0.5 to 5 cm, preferably 2 to 4 cm.
[0022]
(e) Retaining concrete layer As the retaining concrete layer 6 constituting the roof heat insulating waterproof structure 1 of the present invention, joint materials are generally installed at intervals of 3 m on the water permeable material layer 5 at the construction site, and then the joint material It can be formed by placing concrete in between.
The thickness of the concrete plate 6 forming the pressing concrete layer 6 is generally 20 to 100 mm, preferably 40 to 80 mm.
[0023]
(3) Roof drainage channel
(a) Drain outlet The roof heat insulating waterproof structure 1 of the present invention is composed of the laminated structure 7 described above, but most of the rain water 8 that falls on the holding concrete layer 6 is the roof as shown in FIG. It flows to the rooftop drainage channel 11 through the upper lid 12a disposed on the drainage port 12 of the rooftop drainage channel 11 provided for each fixed area of the surface.
However, the rainwater 8 that has gradually entered the presser concrete layer 6 and entered from the gap between the concrete layer 6 and the joint 10 has the water permeability along the gentle slope formed on the roof. It flows naturally through the pores 5c formed in the material layer 5 to the lower side, and finally passes through the top lid 12b provided in the drainage port 12 of the rooftop drainage channel 11 and then passes through the rooftop drainage channel 11. It flows into sewage.
[0024]
On the other hand, the rainwater 8 that penetrates through the gap between the water permeable material layer 5 and the heat insulating material layer 4 and accumulates between the waterproof layer 3 and the leg portions 4b of the legged heat insulating material layer 4 ′ is formed on the roof. Along the gentle slope, the water naturally flows downward through the water conduit 9 formed between the waterproof layer 3 and the leg 4b of the legged heat insulating material layer 4 '. After that, it merges with the rainwater 8 that has passed through the water permeable material layer 5, passes over the inner lid 12 b provided in the drainage port 12 of the rooftop drainage channel 11, and flows into the sewage through the rooftop drainage channel 11.
In order to prevent water leakage, the drainage port 12 of the rooftop drainage channel 11 is preferably formed with a tray 11a connected to the rooftop drainage channel 11 below the inner lid 12b.
[0025]
(b) Structure Therefore, the drainage port 12 of the rooftop drainage channel 11 includes a vertical rooftop drainage channel 11 leading to sewage, a circular receiving tray 11a connected to the vertical rooftop drainage channel 11, and a drainage port 12 A semi-circular cap 15 having a vertical groove portion 15a provided on the top, an inner lid 12b having a hole inserted into the cap at the center, and a cap disposed at the center of the cap 12b. 15 and an upper lid 12a provided with a hole for insertion.
[0026]
[II] Roof insulation and waterproof construction method (roof insulation waterproof method)
(1) Laying of waterproofing layer The waterproofing layer 3 can be formed by laying the waterproofing material 3 used when preventing the infiltration of rainwater on the roof of a building on the concrete slab layer.
These waterproof layers 3 are generally formed by laying the waterproof material 3 in the following manner.
First, an asphalt primer is applied at an application amount of 0.3 liter / m ² , then asphalt is applied at an application amount of 1.0 kg / m ² , and asphalt roofing 1500 is laid thereon.
Further, asphalt is applied again from above at a coating amount of 1.0 kg / m ² , and stretch roofing 1000 is laid thereon.
Then, asphalt is again applied at a coating amount of 1.0 kg / m ² from above, and then stretch roofing 1000 is again laid from above.
Further, by applying asphalt again at a coating amount of 2.0 kg / m ² , the waterproof layer 3 having an eight-layer structure can be formed.
[0027]
(2) Laying of the heat insulating layer Next, the heat insulating layer 4 can be formed by laying the heat insulating material 4 made of foamed plastic on the waterproof layer 3.
[0028]
(3) Formation of water-permeable material layer The water-permeable material layer 5 can be formed by using a particle bonded body in which the surfaces of the foamed resinous particles 5a are bonded on the heat insulating material 4 laid. .
[0029]
(4) Laying the pressing concrete layer The pressing concrete layer 6 can be formed by placing concrete on the water-permeable material layer 5 between joint materials 10 arranged at intervals of about 3 m.
[0030]
[III] Application The roof heat insulating waterproof structure of the present invention formed in this way can be used as a heat insulating waterproof structure on the roof of a concrete building.
When the roof heat insulating waterproof structure of the present invention is used as a heat insulating waterproof structure on the roof of a concrete building, water does not accumulate in the heat insulating layer on the roof and the heat insulating performance does not deteriorate. Can be fulfilled. Therefore, it is optimal as a heat insulating waterproof structure on the roof of a concrete building.
[0031]
【Example】
The present invention will be described more specifically with reference to the following examples and comparative examples.
Example 1
(1) First, asphalt primer was applied at a coating amount of 0.3 liter / m ² on a roof concrete slab laid with a waterproof layer, and then asphalt was applied at a coating amount of 1.0 kg / m ² from above. Furthermore, asphalt roofing 1500 is laid on it. Further, asphalt is applied again from above at a coating amount of 1.0 kg / m ² , and stretch roofing 1000 is laid thereon.
Then, asphalt is again applied at a coating amount of 1.0 kg / m ² from above, and then stretch roofing 1000 is again laid from above.
Furthermore, asphalt was applied again at a coating amount of 2.0 kg / m ² to form a waterproof layer having an eight-layer structure.
[0032]
(2) Laying of a heat insulating layer Next, a legged heat insulating material in which a leg portion having a height of 10 mm is formed on a foamed polystyrene board having a thickness of 3 cm on the waterproof layer (Okasan Sansho Co., Ltd.) A heat-insulating layer was formed by laying a YB board L-30).
[0033]
(3) Formation of water-permeable material layer On the above heat-insulating layer, 1 part by weight of polystyrene foam resin particles manufactured by Mitsubishi Chemical Foam Plastic Co., Ltd. and 1 weight of adhesive of asphalt emulsion CPE3 manufactured by Nippon Bitumen Co., Ltd. Part and a part of acronal 295DN manufactured by BASF Dispersion Co., Ltd., and the surface of the foamed resin particles were coated with an adhesive, dried and solidified (“Styro drain, manufactured by Mitsubishi Chemical Foam Plastic Co., Ltd.) ]) Was formed to a thickness of 3 cm to form a water permeable material layer laid on the heat insulating layer.
[0034]
(4) Pressing concrete layer laying On the above water permeable material layer, concrete was placed between joint materials installed at intervals of about 3 m to form a pressing concrete layer, and a roof heat insulating waterproof structure was formed.
[0035]
(5) Evaluation results As a result of evaluating the heat insulating performance of the roof with the roof heat insulating waterproof structure after two years, the heat insulating performance was not deteriorated.
A part of the roof was peeled off and the insulation layer was examined, but no rainwater was collected and there was no change.
On the other hand, in order to evaluate the thermal insulation performance of the laminate (with 15mm deaeration pipe) of the thermal insulation layer (expanded 30 times product) and the water permeable material layer used as the roof thermal insulation waterproof structure in a short period of time, “Moisture measurement method for insulation materials for outside heat insulation method” defined in the “Architecture of maintenance public corporation construction”, Chapter 8, “Waterproofing work”, Section 2 “Insulation material for outside insulation method” Conforms to "Measurement method of accumulation" As an accelerating method, the environmental conditions of the measurement method described above were evaluated by a method of changing the cycle at a constant temperature and humidity of 20 ° C. ± 1 ° C. and a humidity of 65 ± 5% RH at 5 to 30 ° C.
[0036]
[Measurement of moisture accumulation]
Test apparatus As a test apparatus used for the measurement, three test pieces having shapes and dimensions as shown in Fig. 5 can be attached as shown in Fig. 6 and manufactured by Thermo Espec Laborator, Thermo Regulator. A Satake KHZII-20P type constant temperature and humidity tank manufactured by Satake Chemical Machinery Co., Ltd. and a Sartreus 1334MP type mass measuring instrument manufactured by Carl Zeiss Co., Ltd., in which an LT-140 type constant temperature and humidity water tank was disposed, were used.
[0037]
Test method (1) Mounting of test piece After cutting a test piece into a predetermined size and placing it in a standard state for 48 hours or more, the mass (ω ₀ ) is measured, and the length of each piece of the test piece is further determined. Measurements were made to 0.1 mm, and the respective volumes (V) were determined.
Next, three test pieces are attached to a constant temperature and humidity water bath (temperature 55-60 ° C., humidity 100% RH).
Further, the surface portion of the test piece on the constant temperature and humidity chamber side is wrapped with a film having a thickness of about 0.014 mm of JIS Z 1707 [plastics film for food packaging (polyvinylidene chloride)]. At that time, as shown in FIGS. 5 (a) and 5 (b), the film is folded back to about 5 mm around the side of the constant temperature / humidity water tank and fastened with a tape specified in JIS Z 1512 [cloth gum tape (for packaging)]. .
[0038]
(2) The measurement test of the mass is performed at a constant temperature and humidity chamber having a constant temperature and humidity chamber (constant temperature and humidity environment temperature) as shown in FIG. After being kept in the state for 1 hour, the temperature is lowered over a period of 1 hour at a constant rate to a temperature of 5 ° C. Then, after maintaining the temperature of 5 ° C. for 1 hour, the temperature is raised again to a temperature of 30 ° C. over a period of 1 hour at a constant rate.
Thus, 30 ° C. for 1 hour hold / temperature drop for 1 hour / 5 ° C. for 1 hour hold / temperature rise for 1 hour is defined as 1 cycle (4 hours), and this is 54 cycles (9 days), 102 cycles (17 days), 204 After holding for Cycle (34 days), 312 Cycle (52 days), and 402 Cycle (67 days), the test piece was taken out, the film was removed, the surface was lightly wiped with tissue paper, and then quickly mass (ω) Was measured to measure the change over time in the amount of accumulated water.
The measurement result of the time-dependent change of the water accumulation amount is shown in FIG.
[0039]
(3) Resulting moisture content is calculated according to the following equation.
Moisture content (volume%) = W + 1.64δ _n−1
Here, W: an average value of the moisture accumulation rates (W ₈ , W ₁₇ , W ₃₄ , W ₅₂ , or W ₃₄ ) of three test pieces obtained from the following formula.
[0040]
[Expression 1]

[Expression 2]

[Equation 3]

[Expression 4]

[Equation 5]

[0041]
ω ₉ : Test piece weight of 9 days ω ₁₇ : Test piece weight of ₁₇ days ω ₃₄ : Test piece weight of ₃₄ days ω ₅₂ : Test piece weight of ₅₂ days ω ₆₇ : Test days 67 Specimen weight of day δ _n-1 : Standard deviation
Comparative Example 1
Since the heat insulation effect of a concrete building that has been built for 15 years is poor, a part of the rooftop is peeled off, and the roof heat insulation waterproof structure is investigated. As a result, a pressing concrete layer / heat insulation layer (thickness 3 cm) as shown in FIG. Insulating material made of expanded polystyrene having a foaming ratio of 30 times) / waterproof layer / roof concrete slab layer, and 40% by volume of rainwater was accumulated in the heat insulating layer.
On the other hand, the moisture accumulation rate of the 3 cm thick foamed polystyrene heat insulation layer (expanded product at a magnification of 30 times) used as the roof heat insulating waterproof structure was compared with the heat insulation layer (expanded product at a magnification of 30 times) in Example 1 above and the water permeability. The measurement was carried out in the same manner as in “Method for measuring moisture accumulation” of a laminate with a material layer (with a 15 mm deaeration pipe).
The result is shown in FIG.
[0043]
【The invention's effect】
In such a roof heat insulating waterproof structure of the present invention, since the water permeable material layer is formed on the heat insulating layer, the temperature on the indoor side is high in winter and the temperature on the outdoor side is low. Even if rainwater evaporates into water vapor and permeates through the heat insulating material, the water permeable material layer remains in the drainage ditch even if this water vapor is cooled by the outside air temperature near the outside air of the water permeable material layer and becomes condensed water. It can also play a role as a water conduit for guiding to rainwater, so rainwater does not accumulate in the heat insulation layer and can no longer function as a heat insulating material, and the heat insulation performance deteriorates over a long period of time There is nothing.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a roof heat insulating waterproof structure according to an embodiment of the present invention.
2 is a cross-sectional view of a connection portion of the drainage port of the rooftop drainage channel of the rooftop heat insulating waterproof structure shown in FIG. 1 with the vertical channel.
FIG. 3 is a cross-sectional view of a roof heat insulating waterproof structure according to another embodiment of the present invention.
FIG. 4 is a cross-sectional view of a known roof heat insulating waterproof structure.
FIG. 5 shows the shape of a test piece used in a method for measuring moisture accumulation.
FIG. 6 is an explanatory diagram relating to a method for attaching a test piece used in a method for measuring moisture accumulation to a constant temperature and humidity water bath.
FIG. 7 is an explanatory diagram showing a measurement cycle of a test piece.
FIG. 8 is a diagram illustrating a measurement result of a change in moisture accumulation over time.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rooftop heat insulation waterproof structure 2 Roof concrete slab 2a Leveling concrete 3 Waterproof layer 4 Heat insulation layer 4 'Leg insulation material layer 4a Step part 4b Leg part 4c Bearing member 5 Water-permeable material layer 6 Pressing concrete layer 7 Laminated structure 8 Rain water 9 Water guideway 10 Joint 11 Rooftop drainage channel 11a Drain 12 Drainage port 12a Top lid 12b Middle lid 13 Indoor side 14 Outdoor side 15 Cap 15a Groove

Claims (4)

In the roof thermal insulation waterproof structure formed by a laminate structure comprising a waterproof layer laid on a roof concrete slab, a heat insulation layer formed on the waterproof layer, and a pressing concrete layer laid on the heat insulation layer, A water-permeable material layer for guiding rainwater or condensed water to the roof drainage channel is formed between the heat insulating layer and the presser concrete layer, and the water- permeable material layer adhesively or heats the surfaces of the foamed resin particles. A roof heat insulating waterproof structure characterized in that it is a water-permeable heat insulating material including a particle bonded body having fine pores bonded by fusing . The roof heat insulating waterproof structure according to claim 1, wherein a water conduit is formed between the heat insulating layer and the waterproof layer. The roof heat insulation waterproof structure of Claim 1 or 2 with which the heat insulation layer is formed with the heat insulating material with a leg, and the leg part is a water conduit. The roof heat insulation waterproof structure in any one of Claims 1-3 which provided the inner cover in the drain outlet for draining the rain water collected on the water-permeable material layer to the roof drainage channel.

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