EP2527530B1 - Bituminous roofing sheet - Google Patents

Bituminous roofing sheet Download PDF

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Publication number
EP2527530B1
EP2527530B1 EP12169598.5A EP12169598A EP2527530B1 EP 2527530 B1 EP2527530 B1 EP 2527530B1 EP 12169598 A EP12169598 A EP 12169598A EP 2527530 B1 EP2527530 B1 EP 2527530B1
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EP
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Prior art keywords
bitumen
strips
sheet according
roofing sheet
roofing
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EP12169598.5A
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German (de)
French (fr)
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EP2527530B2 (en
EP2527530A1 (en
Inventor
Niels Graae
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Icopal GmbH
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Icopal GmbH
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
    • D06N5/003—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch coated with bitumen
    • D06N5/006—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch coated with bitumen characterised by the means to apply it to a support or to another roofing membrane, e.g. self-adhesive layer or strip
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/12—Roof covering by making use of flexible material, e.g. supplied in roll form specially modified, e.g. perforated, with granulated surface, with attached pads

Definitions

  • the invention relates to a bituminous roofing membrane, such as a roofing membrane, a roofing membrane or webs, which serve as vapor barriers or liners.
  • the roofing membrane has at least one carrier layer as well as top-side and bottom-side, alternately successive bitumen strips extending in the longitudinal direction of the web and lower-lying, bitumen-free strips with approximately the same width as the bitumen strips.
  • a roofing membrane (in the following also briefly "course") this fundamental structure is from the EP 1 283 929 B known.
  • bitumen-free strips mentioned above and below are the parts of the surface of the carrier layer which are not covered by the raised bitumen strips and are generally non-adhesive.
  • a bituminous carrier layer ie, for example, a nonwoven fabric impregnated with bitumen, which may additionally have a single or multi-layer coating of bitumen on one or both sides, the corresponding surfaces are provided with a particular mineral dispersion and as a result the strips superficially bitumen-free between the bitumen strips.
  • the carrier layer itself is free of bitumen or at least the last layer on at least one side of a polymeric plastic, for example in the form of a coating or a laminated film to which the raised bitumen strips are applied, the intervening, lower-lying bitumen-free strips arise from even.
  • roofing membranes are connected to each other in such a way that the end of a web is overlapped by the beginning of the next following track with a predetermined overlap length.
  • the overlapping web sections are connected to each other at least by pressing, in some cases by heating or welding, in the case of heat-activatable bitumen by welding by means of hot air or gas flame.
  • bituminous roofing membrane with running at the top and bottom in the longitudinal direction of the web bitumen strips and bitumen-free strips known.
  • the bitumen strips at the top and bottom overlap at least partially, so that at least one bitumen strip is present at each point of the web.
  • the DD 265591 A1 discloses a bituminous roofing sheet having spaced-apart bitumen strips extending in the transverse direction of the web for easier curling of the web.
  • the roofing membrane is provided with bitumen strips on one side only.
  • the roofing membrane is provided on both sides with bitumen strips which are exactly aligned with each other.
  • the invention has for its object to provide a roofing membrane of the type mentioned in the introduction, which avoids such leaks in the head butt safely.
  • bituminous roofing membrane with the features of claims 1 in particular in that the top-side bitumen strips are offset from the bottom bitumen strips in the transverse direction of the web by one stripe width, such that at a welding of the end of a web with a this end overlapping the beginning of the next run, the bitumen strips of the latter come to rest in the bitumen-free strips of the former.
  • the lower-side bitumen strips of a subsequent web are engaged in a zipper-like manner between the upper-side, bitumen-free strips of the already laid web.
  • aligned in the longitudinal direction alignment of successive tracks of the inventive offset of the lower side bitumen strip over the top bitumen strip changes nothing.
  • top side and / or the bottom side bitumen strips preferably cover respectively 40% to 60% of the area of the top side or the underside of the roofing membrane.
  • the bituminous strips can have a width between 5 mm and 150 mm.
  • At least the top or bottom bitumen strips have spaced interruptions, and the bitumen-free strips on either side of each bitumen strip communicate with each other through these discontinuities.
  • This allows a vapor pressure equalization, sometimes only on the underside, only on the top or on both sides of the laid tracks.
  • these interruptions do not affect the watertight connection of the head joints.
  • the interruptions of adjacent bitumen strips are offset from each other by more than the length of the overlap of two successive tracks in the longitudinal direction, so that, for example, a further, applied to the web sealing layer no or at least not continuous Lowering shows how they can arise without the offset of the breaks.
  • the offset of the interruptions by more than the overlap length ensures that the bitumen strips intermeshing in the top of the head have no gaps in the transverse direction.
  • the roofing membrane is provided at least on the upper side or underside, usually on both sides with a fusible or removable plastic film, in particular if the bitumen strips consist of cold-bonding bitumen.
  • the surfaces of the top side and / or the bottom side bitumen strips facing away from the carrier layer may have a groove profile. The latter facilitates the removal of the plastic film before or during installation either by peeling or by Abflämmen.
  • the at least one carrier layer generally comprises a tension-resistant insert made of an at least single-layer fleece, grid or fabric.
  • the fleece, mesh or fabric is either impregnated with bitumen or embedded in a polymeric plastic.
  • further functional layers e.g. a coated metal foil, applied on one or both sides.
  • bitumen-free strips may have a superficial mineral dispersion on the carrier layer, alternatively consist of a layer of a plastic polymer.
  • bitumen of the bituminous strips can be cold-bonding or heat-activatable (also in the sense of weldable).
  • roofing membranes of the present type are normally laid in several parallel paths, wherein the longitudinal edges of adjacent webs overlap in a scaly manner.
  • the roofing membrane has a continuous, top-side edge strips of bitumen with a width corresponding to the prescribed overlap width of adjacent webs on one longitudinal edge and a continuous, underside edge strip without bitumen on the other longitudinal edge.
  • FIG. 1 shows the end of a roofing sheet I and the beginning of a longitudinally adjacent roofing sheet II.
  • the end of the sheet I and the beginning of the sheet II overlap over a predetermined by the laying rules of the prior art length 1 and forms the head butt.
  • a next, parallel laid orbit III, which is overlapped by the lanes I and II imbricated, is indicated.
  • the gap between lanes I and II on the one hand and lane III on the other hand has been included for clarity of illustration only.
  • the tracks are constructed identically, as in the following with reference to the in Fig. 2 illustrated partial cross section in the region of the head joint between the railways I and II is explained:
  • Each of the webs comprises a cross-hatched, tensile insert 1, e.g. of a bitumen-impregnated fibrous web or a fabric or a grid of tensile fibers, e.g. Glass fibers.
  • tensile insert 1 e.g. of a bitumen-impregnated fibrous web or a fabric or a grid of tensile fibers, e.g. Glass fibers.
  • coatings 2 and 3 are applied on both sides, which may consist of bitumen or a polymer plastic. Coatings 2 and 3 may be identical or different. The layer thicknesses shown are not to scale.
  • the insert 1 and the coatings 2, 3 together form the carrier layer of the roofing membrane.
  • the webs I, II and III on the carrier layer spaced apart, raised bitumen strips 4 and 5 have the same width.
  • the bitumen strips 4 and 5 are separated from each other by bitumen-free strips 6 and 7, respectively.
  • the coating 2 is made of bitumen, therefore, for the web I exaggerated indicated, mineral scouring 8 applied to this coating 2 over the entire surface.
  • the existing in the field of bitumen stripping is embedded in the bottom of the bitumen and therefore not visible in the figure. If the coatings 2 and / or 3 are made of a polymeric plastic, such a scattering is unnecessary.
  • the top side bitumen strips 4 are transversely offset relative to the bottom bitumen strips 5, in such a way that the lower side bitumen strips 5 in height of the top side run bitumen-free strip 6. If the bitumen-free strips have the same width as the bitumen strips as assumed in the present embodiment, the offset is the underside bitumen strip 5 opposite the top-side bitumen strips 4 equal to the width of these bitumen strips. However, the plastic properties of the bitumen make it possible to make the width of the bitumen-free strips slightly smaller or slightly larger than the width of the bituminous strips. In any case, the lower-side bituminous strips 5 of the web II engage the bitumen-free strips 6 at the top of the web I in a zip-like manner in the area of the top of the head.
  • bitumen strips have spaced longitudinally staggered interruptions 9 that allow for vapor pressure equalization below and above the laid roof sheeting.
  • a continuous or longitudinally slotted foil Before laying such roofing membranes are usually covered on both sides with a continuous or longitudinally slotted foil.
  • a continuous or longitudinally slotted foil In Fig. 2 Such a film 10 is indicated only schematically. The film may be peelable or fusible by the usual gas burner.
  • the webs I and II (and also III) have at their one longitudinal edge, here the left longitudinal edge, the upper side a wide edge strip 11 made of bitumen. It is used for connection, in particular for welding with a parallel and overlapping roofing membrane as III.
  • the carrier layer 1, 2, 3 bitumen-free, so that does not form a thickened seam strip in the overlap region of two parallel webs.

Description

Die Erfindung betrifft eine bituminöse Dachbahn, z.B. eine Dachabdichtungsbahn, eine Unterspannbahn oder Bahnen, die als Dampfsperren oder Zwischenlagen dienen. Die Dachbahn hat zumindest eine Trägerschicht sowie oberseitige und unterseitige, abwechselnd aufeinander folgende, in Längsrichtung der Bahn verlaufende Bitumenstreifen und gegenüber diesen tiefer liegende, bitumenfreie Streifen mit etwa der gleichen Breite wie die Bitumenstreifen. Eine Dachbahn (im folgenden auch kurz "Bahn") diesen grundsätzlichen Aufbaus ist aus der EP 1 283 929 B bekannt.The invention relates to a bituminous roofing membrane, such as a roofing membrane, a roofing membrane or webs, which serve as vapor barriers or liners. The roofing membrane has at least one carrier layer as well as top-side and bottom-side, alternately successive bitumen strips extending in the longitudinal direction of the web and lower-lying, bitumen-free strips with approximately the same width as the bitumen strips. A roofing membrane (in the following also briefly "course") this fundamental structure is from the EP 1 283 929 B known.

Die vorstehend und im folgenden genannten bitumenfreien Streifen sind die nicht von den erhabenen Bitumenstreifen bedeckten Teile der Oberfläche der Trägerschicht und in der Regel nicht klebend. Im Fall einer bituminösen Trägerschicht, also z.B. einem mit Bitumen imprägnierten Faservlies, das zusätzlich auch auf einer oder auf beiden Seiten eine ein- oder mehrlagige Beschichtung aus Bitumen haben kann, sind die entsprechenden Oberflächen mit einer insbesondere mineralischen Abstreuung versehen und infolge dessen sind die Streifen zwischen den Bitumenstreifen oberflächlich bitumenfrei. Wenn die Trägerschicht selbst bitumenfrei ist oder mindestens die letzte Lage auf mindestens einer Seite aus einem polymeren Kunststoff z.B. in Form einer Beschichtung oder einer auflaminierten Folie besteht, auf die die erhabenen Bitumenstreifen aufgebracht sind, ergeben sich die dazwischen liegenden, tiefer liegenden bitumenfreien Streifen hingegen von selbst.The bitumen-free strips mentioned above and below are the parts of the surface of the carrier layer which are not covered by the raised bitumen strips and are generally non-adhesive. In the case of a bituminous carrier layer, ie, for example, a nonwoven fabric impregnated with bitumen, which may additionally have a single or multi-layer coating of bitumen on one or both sides, the corresponding surfaces are provided with a particular mineral dispersion and as a result the strips superficially bitumen-free between the bitumen strips. If the carrier layer itself is free of bitumen or at least the last layer on at least one side of a polymeric plastic, for example in the form of a coating or a laminated film to which the raised bitumen strips are applied, the intervening, lower-lying bitumen-free strips arise from even.

Nach den Regeln des Dachdeckerhandwerks werden in Längsrichtung aneinander anschließende bitumöse Dachbahnen derart miteinander verbunden, dass das Ende einer Bahn von dem Anfang der nächstfolgenden Bahn mit einer vorgegebenen Überlappungslänge übergriffen wird. In diesem sogenannten Kopfstoß werden die überlappenden Bahnabschnitte im Fall von kaltklebendem Bitumen mindestens durch Andrücken, fallweise durch Anwärmen oder Verschweissen, im Fall von wärmeaktivierbarem Bitumen durch Verschweißen mittels Heißluft oder Gasflamme miteinander verbunden. Diese Kopfstöße sind zwar im Fall von Dachbahnen mit durchgehender Bitumenbeschichtung wasserdicht; bei Dachbahnen der einleitend genannten Art kann es jedoch - vor allem wenn die Streifen aus kaltklebendem Bitumen sind - zu Undichtigkeiten kommen, weil gerade bei sorgfältiger Ausrichtung der aneinander anschließenden Bahnen die unterseitigen Bitumenstreifen der zweiten Bahn genau auf die oberseitigen Streifen der ersten, bereits verlegten Bahn zu liegen kommen, mit dem Risiko, dass die zunächst bitumenfreien Streifen im Bereich des Kopfstoßes nicht vollständig von beim Andrücken verdrängtem oder durch die Flamme verflüssigtem Bitumen ausgefüllt sind.According to the rules of the roofing trade longitudinally adjacent bitumen roofing membranes are connected to each other in such a way that the end of a web is overlapped by the beginning of the next following track with a predetermined overlap length. In this so-called head butt, in the case of cold-sticking bitumen, the overlapping web sections are connected to each other at least by pressing, in some cases by heating or welding, in the case of heat-activatable bitumen by welding by means of hot air or gas flame. Although these head joints are watertight in the case of roofing membranes with a continuous bitumen coating; However, in the case of roofing membranes of the type mentioned in the introduction, leaks may occur, especially if the adjacent webs are carefully aligned, the lower-lying bitumen strips of the second web strike the top-side strips of the first, already laid web to come to rest, with the risk that the initially bitumen-free strips are not completely filled in the area of the head butt by displaced or liquefied by the flame bitumen.

Aus der DE 2031679 U1 ist eine bituminöse Dachbahn mit an Ober- und Unterseite in Längsrichtung der Bahn verlaufenden Bitumenstreifen und Bitumen-freien Streifen bekannt. Die Bitumenstreifen an Ober- und Unterseite überlappen sich zumindest teilweise, damit an jeder Stelle der Bahn mindestens ein Bitumenstreifen vorhanden ist.From the DE 2031679 U1 is a bituminous roofing membrane with running at the top and bottom in the longitudinal direction of the web bitumen strips and bitumen-free strips known. The bitumen strips at the top and bottom overlap at least partially, so that at least one bitumen strip is present at each point of the web.

Die DD 265591 A1 offenbart eine bituminöse Dachbahn mit voneinander beabstandeten Bitumenstreifen, die sich in der Querrichtung der Bahn erstrecken, damit die Bahn leichter aufgerollt werden kann. In einer Ausführungsform ist die Dachbahn nur einseitig mit Bitumenstreifen versehen. In einer weiteren Ausführungsform ist die Dachbahn beidseitig mit Bitumenstreifen versehen, die genau miteinander fluchten.The DD 265591 A1 discloses a bituminous roofing sheet having spaced-apart bitumen strips extending in the transverse direction of the web for easier curling of the web. In one embodiment, the roofing membrane is provided with bitumen strips on one side only. In a further embodiment, the roofing membrane is provided on both sides with bitumen strips which are exactly aligned with each other.

Der Erfindung liegt die Aufgabe zugrunde, eine Dachbahn der einleitend angegebenen Gattung zu schaffen, die solche Undichtigkeiten im Bereich des Kopfstoßes sicher vermeidet.The invention has for its object to provide a roofing membrane of the type mentioned in the introduction, which avoids such leaks in the head butt safely.

Diese Aufgabe ist erfindungsgemäß mit einer bituminösen Dachbahn mit den Merkmalen des Patentansprüches 1 insbesondere dadurch gelöst, dass die oberseitigen Bitumenstreifen gegenüber den unterseitigen Bitumenstreifen in Querrichtung der Bahn um eine Streifenbreite versetzt sind, derart, dass bei einer Verschweißung des Endes einer Bahn mit einem dieses Ende überlappenden Anfang der nächsten Bahn die Bitumenstreifen letzterer in die bitumenfreien Streifen ersterer zu liegen kommen.This object is achieved according to the invention with a bituminous roofing membrane with the features of claims 1 in particular in that the top-side bitumen strips are offset from the bottom bitumen strips in the transverse direction of the web by one stripe width, such that at a welding of the end of a web with a this end overlapping the beginning of the next run, the bitumen strips of the latter come to rest in the bitumen-free strips of the former.

Erfindungsgemäß greifen also im Überlappungsbereich die unterseitigen Bitumenstreifen einer anschließenden Bahn reißverschlußartig zwischen die oberseitigen, bitumenfreien Streifen der bereits verlegten Bahn ein. Infolge dessen ist auch bei weniger sorgfältigem Arbeiten leichter zu erreichen, dass die jeweiligen Kopfstöße aufeinanderfolgender Bahnen wasserdicht sind. An der üblichen, in Längsrichtung fluchtenden Ausrichtung aufeinander folgender Bahnen ändert der erfindungsgemäße Versatz der unterseitigen Bitumenstreifen gegenüber den oberseitigen Bitumenstreifen nichts.According to the invention, therefore, in the overlapping area, the lower-side bitumen strips of a subsequent web are engaged in a zipper-like manner between the upper-side, bitumen-free strips of the already laid web. As a result, it is easier to achieve even with less careful work that the respective head joints of successive tracks are waterproof. At the usual, aligned in the longitudinal direction alignment of successive tracks of the inventive offset of the lower side bitumen strip over the top bitumen strip changes nothing.

Die oberseitigen und/oder die unterseitigen Bitumenstreifen bedecken vorzugsweise jeweils 40 % bis 60 % der Fläche der Oberseite bzw. der Unterseite der Dachabdichtungsbahn.The top side and / or the bottom side bitumen strips preferably cover respectively 40% to 60% of the area of the top side or the underside of the roofing membrane.

Die Bitumenstreifen können eine Breite zwischen 5 mm und 150 mm haben.The bituminous strips can have a width between 5 mm and 150 mm.

Vorzugsweise haben mindestens die oberseitigen oder die unterseitigen Bitumenstreifen voneinander beabstandete Unterbrechungen und die bitumenfreien Streifen beidseits jedes Bitumenstreifens stehen über diese Unterbrechungen miteinander in Verbindung. Dies ermöglicht einen Dampfdruckausgleich, fallweise nur unterseitig, nur oberseitig oder auf beiden Seiten der verlegten Bahnen. Diese Unterbrechungen beeinträchtigen jedoch die wasserdichte Verbindung der Kopfstöße nicht.Preferably, at least the top or bottom bitumen strips have spaced interruptions, and the bitumen-free strips on either side of each bitumen strip communicate with each other through these discontinuities. This allows a vapor pressure equalization, sometimes only on the underside, only on the top or on both sides of the laid tracks. However, these interruptions do not affect the watertight connection of the head joints.

Zweckmäßig sind die Unterbrechungen benachbarter Bitumenstreifen um mehr als die Länge der Überlappung von zwei in Längsrichtung aufeinander folgenden Bahnen gegeneinander versetzt, sodass z.B. eine weitere, auf die Bahn aufgebrachte Abdichtungslage keine oder zumindest keine durchgehenden Einsenkungen zeigt, wie sie ohne den Versatz der Unterbrechungen entstehen können. Gleichzeitig wird durch den Versatz der Unterbrechungen um mehr als die Überlappungslänge sichergestellt, dass die im Kopfstoß ineinandergreifenden Bitumenstreifen in Querrichtung keine Lücken haben.Advantageously, the interruptions of adjacent bitumen strips are offset from each other by more than the length of the overlap of two successive tracks in the longitudinal direction, so that, for example, a further, applied to the web sealing layer no or at least not continuous Lowering shows how they can arise without the offset of the breaks. At the same time, the offset of the interruptions by more than the overlap length ensures that the bitumen strips intermeshing in the top of the head have no gaps in the transverse direction.

Im Regelfall ist die Dachbahn mindestens oberseitig oder unterseitig, normalerweise beidseitig mit einer schmelzbaren oder abziehbaren Kunststofffolie versehen, insbesondere wenn die Bitumenstreifen aus kaltklebendem Bitumen bestehen.As a rule, the roofing membrane is provided at least on the upper side or underside, usually on both sides with a fusible or removable plastic film, in particular if the bitumen strips consist of cold-bonding bitumen.

Die von der Trägerschicht abgewandten Flächen der oberseitigen und/oder der unterseitigen Bitumenstreifen können ein Rillenprofil haben. Letzteres erleichtert das Entfernen der Kunststofffolie vor oder beim Verlegen entweder durch Abziehen oder durch Abflämmen.The surfaces of the top side and / or the bottom side bitumen strips facing away from the carrier layer may have a groove profile. The latter facilitates the removal of the plastic film before or during installation either by peeling or by Abflämmen.

Die zumindest eine Trägerschicht umfasst in der Regel eine zugfeste Einlage aus einem zumindest einlagigen Vlies, Gitter oder Gewebe. Das Vlies, Gitter oder Gewebe ist entweder mit Bitumen imprägniert oder in einen polymeren Kunststoff eingebettet. Je nach Verwendungszweck der Dachbahn können auf diese imprägnierte oder eingebettete Einlage weitere Funktionsschichten, z.B. eine beschichtete Metallfolie, auf einer oder beiden Seiten aufgebracht sein.The at least one carrier layer generally comprises a tension-resistant insert made of an at least single-layer fleece, grid or fabric. The fleece, mesh or fabric is either impregnated with bitumen or embedded in a polymeric plastic. Depending on the intended use of the roofing sheet, further functional layers, e.g. a coated metal foil, applied on one or both sides.

Wie eingangs erwähnt, können die bitumenfreien Streifen eine oberflächliche mineralische Abstreuung auf der Trägerschicht haben, alternativ aus einer Schicht aus einem Kunststoffpolymer bestehen.As mentioned above, the bitumen-free strips may have a superficial mineral dispersion on the carrier layer, alternatively consist of a layer of a plastic polymer.

Das Bitumen der Bitumenstreifen kann kaltklebend oder wärmeaktivierbar (auch im Sinne von schweißbar) sein.The bitumen of the bituminous strips can be cold-bonding or heat-activatable (also in the sense of weldable).

Dachbahnen der vorliegenden Art werden normalerweise in mehreren parallelen Bahnen verlegt, wobei die Längsränder benachbarter Bahnen sich schuppenförmig überlappen. Hierzu hat die Dachbahn einen durchgehenden, oberseitigen Randstreifen aus Bitumen mit einer der vorgeschriebenen Überdeckungsbreite benachbarter Bahnen entsprechenden Breite an dem einen Längsrand und einen durchgehenden, unterseitigen Randstreifen ohne Bitumen an dem anderen Längsrand.Roofing membranes of the present type are normally laid in several parallel paths, wherein the longitudinal edges of adjacent webs overlap in a scaly manner. For this purpose, the roofing membrane has a continuous, top-side edge strips of bitumen with a width corresponding to the prescribed overlap width of adjacent webs on one longitudinal edge and a continuous, underside edge strip without bitumen on the other longitudinal edge.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der schematisch vereinfachten Zeichnung erläutert. Es zeigt:

Fig. 1:
den Kopfstoßbereich von zwei aneinander anschließenden Dachbahnen, und
Fig. 2:
einen Querschnitt entsprechend der Linie II-II in Ziff. 1.
An embodiment of the invention will be explained below with reference to the schematically simplified drawing. It shows:
Fig. 1:
the head joint area of two adjoining roofing membranes, and
Fig. 2:
a cross section corresponding to the line II-II in Ziff. 1.

Figur 1 zeigt das Ende einer Dachbahn I und den Anfang einer in Längsrichtung anschließenden Dachbahn II. Das Ende der Bahn I und der Anfang der Bahn II überlappen sich über eine durch die Verlegeregeln nach dem Stand der Technik vorgegebene Länge 1 und bildet dort den Kopfstoß. Eine nächste, parallel verlegte Bahn III, die von den Bahnen I und II schuppenartig übergriffen wird, ist angedeutet. Der Spalt zwischen den Bahnen I und II einerseits und der Bahn III anderseits wurde nur der Klarheit der Darstellung halber eingefügt. FIG. 1 shows the end of a roofing sheet I and the beginning of a longitudinally adjacent roofing sheet II. The end of the sheet I and the beginning of the sheet II overlap over a predetermined by the laying rules of the prior art length 1 and forms the head butt. A next, parallel laid orbit III, which is overlapped by the lanes I and II imbricated, is indicated. The gap between lanes I and II on the one hand and lane III on the other hand has been included for clarity of illustration only.

Die Bahnen sind identisch aufgebaut, wie im folgenden anhand des in Fig. 2 dargestellten Teilquerschnitts im Bereich des Kopfstoßes zwischen den Bahnnen I und II erläutert wird:The tracks are constructed identically, as in the following with reference to the in Fig. 2 illustrated partial cross section in the region of the head joint between the railways I and II is explained:

Jede der Bahnen umfasst eine kreuzschraffiert dargestellte, zugfeste Einlage 1, z.B. aus einem bitumenimprägnierten Faservlies oder einem Gewebe oder einem Gitter aus zugfesten Fasern , z.B. Glasfasern. Auf die Einlage 1 sind beidseits Beschichtungen 2 und 3 aufgebracht, die aus Bitumen oder einem Polymerkunststoff bestehen können. Die Beschichtungen 2 und 3 können identisch oder voneinander verschieden sein. Die dargestellten Schichtdicken sind nicht massstäblich. Die Einlage 1 und die Beschichtungen 2, 3 bilden zusammen die Trägerschicht der Dachabdichtungsbahn.Each of the webs comprises a cross-hatched, tensile insert 1, e.g. of a bitumen-impregnated fibrous web or a fabric or a grid of tensile fibers, e.g. Glass fibers. On the insert 1 coatings 2 and 3 are applied on both sides, which may consist of bitumen or a polymer plastic. Coatings 2 and 3 may be identical or different. The layer thicknesses shown are not to scale. The insert 1 and the coatings 2, 3 together form the carrier layer of the roofing membrane.

Oberseitig und unterseitig haben die Bahnen I, II und III auf der Trägerschicht voneinander beabstandete, erhabene Bitumenstreifen 4 bzw. 5 gleicher Breite. Die Bitumenstreifen 4 bzw. 5 sind voneinander durch bitumenfreie Streifen 6 bzw. 7 getrennt. Wenn z.B. die Beschichtung 2 aus Bitumen besteht, ist deshalb die für die Bahn I übertrieben angedeutete, mineralische Abstreuung 8 auf diese Beschichtung 2 vollflächig aufgebracht. Die auch im Bereich der Bitumenstreifen vorhandene Abstreuung ist in die Unterseite des Bitumens eingebettet und deshalb in der Figur nicht erkennbar. Wenn die Beschichtungen 2 und/oder 3 aus einem polymeren Kunststoff sind, erübrigt sich eine solche Abstreuung.On the upper side and underside, the webs I, II and III on the carrier layer spaced apart, raised bitumen strips 4 and 5 have the same width. The bitumen strips 4 and 5 are separated from each other by bitumen-free strips 6 and 7, respectively. If e.g. the coating 2 is made of bitumen, therefore, for the web I exaggerated indicated, mineral scouring 8 applied to this coating 2 over the entire surface. The existing in the field of bitumen stripping is embedded in the bottom of the bitumen and therefore not visible in the figure. If the coatings 2 and / or 3 are made of a polymeric plastic, such a scattering is unnecessary.

Um im Bereich des Kopfstosses zwischen den Bahnen I und II eine wasserdichte Verbindung auch bei nicht sehr sorgfältiger Verlegung zu erzielen, sind die oberseitigen Bitumenstreifen 4 gegenüber den unterseitigen Bitumenstreifen 5 in Querrichtung versetzt, und zwar so, dass die unterseitigen Bitumenstreifen 5 in Höhe der oberseitigen bitumenfreien Streifen 6 verlaufen. Wenn die bitumenfreien Streifen die gleiche Breite wie die Bitumenstreifen haben wie im vorliegenden Ausführungsbeispiel angenommen, ist der Versatz der unterseitigen Bitumenstreifen 5 gegenüber den oberseitigen Bitumenstreifen 4 gleich der Breite dieser Bitumenstreifen. Die plastischen Eigenschaften des Bitumens ermöglichen es jedoch, die Breite der bitumenfreien Streifen etwas kleiner oder etwas größer als die Breite der Bitumenstreifen zu machen. In jedem Fall greifen im Kopfstoßbereich die unterseitigen Bitumenstreifen 5 der Bahn II in die bitumenfreien Streifen 6 an der Oberseite der Bahn I reißverschlußartig ein.In order to achieve a watertight connection in the region of the head joint between the webs I and II, even if not very careful laying, the top side bitumen strips 4 are transversely offset relative to the bottom bitumen strips 5, in such a way that the lower side bitumen strips 5 in height of the top side run bitumen-free strip 6. If the bitumen-free strips have the same width as the bitumen strips as assumed in the present embodiment, the offset is the underside bitumen strip 5 opposite the top-side bitumen strips 4 equal to the width of these bitumen strips. However, the plastic properties of the bitumen make it possible to make the width of the bitumen-free strips slightly smaller or slightly larger than the width of the bituminous strips. In any case, the lower-side bituminous strips 5 of the web II engage the bitumen-free strips 6 at the top of the web I in a zip-like manner in the area of the top of the head.

Optional haben die Bitumenstreifen beabstandete in Längsrichtung gegeneinander versetzte Unterbrechungen 9, die einen Dampfdruckausgleich unterhalb und oberhalb der verlegten Dachbahn ermöglichen.Optionally, the bitumen strips have spaced longitudinally staggered interruptions 9 that allow for vapor pressure equalization below and above the laid roof sheeting.

Vor ihrer Verlegung sind derartige Dachbahnen in aller Regel beidseitig mit einer durchgehenden oder auch längsgeschlitzten Folie abgedeckt. In Fig. 2 ist eine derartige Folie 10 nur schematisch angedeutet. Die Folie kann abziehbar oder mittels des üblichen Gasbrenners schmelzbar sein.Before laying such roofing membranes are usually covered on both sides with a continuous or longitudinally slotted foil. In Fig. 2 Such a film 10 is indicated only schematically. The film may be peelable or fusible by the usual gas burner.

Die Bahnen I und II (und ebenso III) haben an ihrem einen Längsrand, hier dem linken Längsrand, oberseitig einen breiten Randstreifen 11 aus Bitumen. Er dient zur Verbindung, insbesondere zur Verschweissung mit einer parallel und überlappend verlegten Dachbahn wie III. An ihrem gegenüberliegenden (rechten) unterseitigen Längsrand 12 ist die Trägerschicht 1, 2, 3 bitumenfrei, damit sich im Überdeckungsbereich von zwei parallelen Bahnen nicht ein verdickter Nahtstreifen bildet.The webs I and II (and also III) have at their one longitudinal edge, here the left longitudinal edge, the upper side a wide edge strip 11 made of bitumen. It is used for connection, in particular for welding with a parallel and overlapping roofing membrane as III. At its opposite (right) underside longitudinal edge 12, the carrier layer 1, 2, 3 bitumen-free, so that does not form a thickened seam strip in the overlap region of two parallel webs.

Claims (12)

  1. Bituminous roofing sheet (I, II, III) having an at least single-ply backing layer and top-side and bottom-side bitumen strips (4, 5) of identical width which extend in the longitudinal direction of the sheet and are separated from one another by lower-lying bitumen-free strips (6, 7), wherein the top-side bitumen strips (4) are offset with respect to the bottom-side bitumen strips (5) by a strip width in the transverse direction of the sheet (I, II, III), such that when the sheet is laid in the longitudinal direction, at an end joint, the end of the sheet (I) having a start of the next identical sheet (II) overlapping this end in the longitudinal direction, the bottom-side bitumen strips (5) of the next sheet (II) come to lie in the top-side bitumen-free strips (6) of the sheet and engage therein in the manner of a zip.
  2. Roofing sheet according to Claim 1, wherein the top-side and/or bottom-side bitumen strips (4, 5) each cover at least 40% to 60% of the area of the top side and bottom side, respectively, of the roofing sheet (I, II, III).
  3. Roofing sheet according to Claim 1 or 2, wherein the bitumen strips (4, 5) have a width of between 5 mm and 150 mm.
  4. Roofing sheet according to one of Claims 1 to 3, wherein at least the top-side or the bottom-side bitumen strips (4, 5) have spaced-apart interruptions (9), and the bitumen-free strips (6, 7) on both sides of each bitumen strip (4, 5) are connected together via these interruptions (9).
  5. Roofing sheet according to Claim 4, wherein the interruptions (9) in adjacent bitumen strips (4, 5) are offset with respect to one another by more than the length (1) of the overlap of two sheets (I, II) that follow one another in the longitudinal direction.
  6. Roofing sheet according to one of Claims 1 to 5, wherein the faces, facing away from the backing layer, of at least the top-side or the bottom-side bitumen strips (4, 5) have a grooved profile.
  7. Roofing sheet according to one of Claims 1 to 6, wherein the backing layer comprises a tension-resistant insert (1) made of an at least single-ply nonwoven or mesh or woven fabric.
  8. Roofing sheet according to one of Claims 1 to 7, wherein the surface of the bitumen-free strips (6, 7) consists of a mineral granular surface (8) or a cured polymer.
  9. Roofing sheet according to one of Claims 1 to 8, wherein the bitumen of the bitumen strips (4, 5) is a cold-adhesive bitumen.
  10. Roofing sheet according to one of Claims 1 to 8, wherein the bitumen of the bitumen strips (4, 5) consists of a heat-activatable bitumen.
  11. Roofing sheet according to one of Claims 1 to 10, wherein it has a meltable or peelable plastic film (10) at least on its top side or bottom side.
  12. Roofing sheet according to one of Claims 1 to 11, having a continuous, top-side edge strip (11) made of bitumen having a width corresponding to the above-described overlapping width in the transverse direction of adjacent sheets (I, III) at one longitudinal edge, and a continuous, bottom-side edge strip (12) without bitumen at the other longitudinal edge.
EP12169598.5A 2011-05-26 2012-05-25 Bituminous roofing sheet Active EP2527530B2 (en)

Applications Claiming Priority (1)

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DE102011102534A DE102011102534A1 (en) 2011-05-26 2011-05-26 Bituminous roofing membrane

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EP2527530A1 EP2527530A1 (en) 2012-11-28
EP2527530B1 true EP2527530B1 (en) 2017-01-04
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EP (1) EP2527530B2 (en)
DE (1) DE102011102534A1 (en)
DK (1) DK2527530T4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6900650B1 (en) 2004-03-01 2005-05-31 Transmeta Corporation System and method for controlling temperature during burn-in
DE102014015967A1 (en) * 2014-10-31 2016-05-04 Ewald Dörken Ag Sub-roof track for pitched roofs with adjoining roof surfaces

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD265591A1 (en) 1987-11-05 1989-03-08 Mansfeld Kombinat W Pieck Veb COVERAGE. SEALING MATERIAL
WO2001090506A1 (en) 2000-05-25 2001-11-29 Icopal Gmbh Roof sealing web
DE20310679U1 (en) 2003-07-11 2003-09-11 Paul Bauder Gmbh & Co Kg Bitumen web has bitumen layer, which is reinforced by flat carrier and is covered by parallel strips of bitumen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD265591A1 (en) 1987-11-05 1989-03-08 Mansfeld Kombinat W Pieck Veb COVERAGE. SEALING MATERIAL
WO2001090506A1 (en) 2000-05-25 2001-11-29 Icopal Gmbh Roof sealing web
DE20310679U1 (en) 2003-07-11 2003-09-11 Paul Bauder Gmbh & Co Kg Bitumen web has bitumen layer, which is reinforced by flat carrier and is covered by parallel strips of bitumen

Also Published As

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EP2527530B2 (en) 2020-02-12
DK2527530T4 (en) 2020-05-04
DK2527530T3 (en) 2017-04-18
DE102011102534A1 (en) 2012-11-29
EP2527530A1 (en) 2012-11-28

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