GB2094370A

GB2094370A - Shingle element for roofing

Info

Publication number: GB2094370A
Application number: GB8206630A
Authority: GB
Original assignee: Fjeldhammer Brug AS
Current assignee: Fjeldhammer Brug AS
Priority date: 1981-03-06
Filing date: 1982-03-05
Publication date: 1982-09-15
Also published as: SE8201370L; SE444596B; FI820708L; NO810774L; GB2094370B; DE3206519A1

Abstract

A shingle element for roofing wherein adhesive areas (5, 6) are provided on the top side of the element for securing tongues (3) of overlying elements. The back side is provided with a continuous adhesive area (7) which covers the entire back side (the spine) of the element, apart from the tongues. This area (7) is covered with a foil to prevent elements from adhering to each other when stacked together. The foil covering the adhesive area (7) is split lengthwise into two strips (8, 9), of which the foil strip (9) lying closest to the tongues (3) is a tear-off strip. On the top side of the shingle element a continuous adhesive area (5) is provided at the back edge (4) of the element, as well as adhesive areas (6) for the tongues. To facilitate tearing off the foil strip (9), the strips (8, 9) are arranged so as to overlap each other at the coincident longitudinal edges (10) thereof. <IMAGE>

Description

SPECIFICATION Shingle element for roofing The present invention relates to a shingle element for roofing, wherein adhesive areas are provided on the upper side of the element for securing overlying elements thereto and the back side is provided with a continuous adhesive area, covered with a foil to prevent individual elements from adhering to each other when stacked together.

The first type of shingles which were produced lacked any adhesive areas at all. The first shingle elements to be provided with adhesive areas had adhesive areas underneath the tongues and on the upper side of the "spine" of the element, i.e., the region lying interiorally of the tongues. The foils were removed as the roofing operation progressed. In time, the heat of the sun glued the shingle tongues down so that they could not loosen in the wind, and an asphalt-against-asphalt adhesion was formed along the back edge of the shingle plate which prevented penetration by water. This system is patented. The system was very good from a roofing point of view, but was somewhat troublesome to lay owing to the relatively large plastic strips which had to be peeled off.

Somewhat later, a type of shingle was marketed which did not have the foil tear-off strip and wherein ail the adhesive areas were located on the top side of the shingle. The adhesive areas secured the tongues, but were only minimally effective in preventing water from penetrating over the spine of the shingle. The adhesive areas were activated by the heat of the sun, as before, but were improved in that the adhesive also provided a certain degree of attachment when the shingles were walked upon and tramped down, in the summertime. This type of adhesive is called a heat- and pressure-sensitive adhesive. Asphaltbased glue is used as the adhesive agent. To prevent the elements in a package from sticking to each other, the back side of each element was provided with a so-called slip-foil. This was a technique which was known in the USA.This type of shingle has the advantage that the elements are very well protected against sticking together in the package and can be laid quickly. The drawback is of course that there is no protection against penetration by water over the spine of the element. In moderate climates this is not a real problem, but in districts subject to rough weather with driving rain, water may penetrate in over the spine of the elements and leak down into the roof structure. This can also occur if there is poor ventilation under the roof. A barrier of ice may in that case build up along the edge of the roof. When the ice melts, a puddle of water can form in back of the roof edge and may then penetrate under the layers of shingles.

The present invention may make possible the provision of a shingle element which is well protected against adhering to other elements in a stack, which can be laid quickly in an ordinary climate, and which in areas subject to driving rains can seal against a penetration of water over the spine of the shingle.

According to the present invention there is provided a shingle element of the type defined introductorily which is characterized in that the foil is split lengthwise of the shingle element into two strips, of which at least the foil strip lying closest to the tongues is a tear-off strip, and that on the top side of the shingle element a continuous adhesive area is provided at the back edge of the member.

In a practical embodiment of the invention, the two foil strips overlap each other at the coincident longitudinal edges thereof.

A preferred embodiment is characterized in that the adhesive area at the back edge of the shingle element consists of a heat-sensitive adhesive agent, whereas the adhesive areas for the tongues are both heat- and pressure-sensitive.

As another preferred feature, the adhesive region at the back edge and the adhesive areas for the tongues are contiguous, thus forming a joint adhesive area with a toothed edge.

The invention will be elucidated in greater detail in the following with reference to the accompanying drawings, wherein Figure 1 shows the shingle element of the invention seen from above, Figure 2 shows the shingle element seen from below, Figure 3 shows shingle elements of the invention laid in a first manner, and Figure 4 shows shingle members of the invention laid in a second manner.

The shingle element 1, in a conventional manner, consists of a spine 2 and tongues 3.

Along the back edge 4 of the spine 2, on the upper side of the shingle element, a continuous adhesive area 5 of heat-sensitive asphalt is provided. At the place where the ends of the tongues on overlying elements will be positioned, adhesive areas 6 are provided with consist of heat- and pressuresensitive asphalt.

The top side of the tongues and the part of the spine which will be visible on the finished roof are coated in the conventional manner with a relatively coarse grit material. The underside of the shingle element has a longitudinal glue region 7, which is covered with a plastic foil that is divided into two strips 8 and 9. The strips are of such width that they overlap each other with a central overlap 10. As is evident from the above and as may be seen clearly in the drawings, the foil strips 8 and 9 will cover the glue areas 5 and 6 completely when the shingle elements are stacked one on top of the next with the back side of one shingle element lying against the top side of the shingle element directly below. Thus, the elements in the stack will not become adhered to each other.

If shingle elements according to the invention are to be laid in a district that is not subject to rough weather, a shingle element 1 is placed on top of an already-laid row of shingle elements without removing the strips 8 and 9. The tongues of the shingle 3 will extend over the adhesive areas 6 of heat- and pressure-sensitive asphalt as well as the area 5 of heat-sensitive asphalt, and will become firmly adhered so that the tongues will not loosen in the wind.

If the shingles are to be laid on a roof in a district subject to driving rain, the strip 9 is removed before the shingle element 1 is placed on top of a previously-laid row of shingle elements.

The lower part of the adhesive area 7 on the back side of the shingle element will then lie against the glue area 5 on the top side of the shingle element directly below it, so that one obtains a tight seal at the back edge of the row of shingles which will prevent water from penetrating.

Thus, the invention enables the roofing operation to be performed in a time-saving manner in districts without driving rain, since the strips 8 and 9 may be retained on the back side of the shingle elements. In districts subject to hard rain, one can obtain a complete sealing of the shingle layer by peeling off the strip 9 so as to obtain an asphalt-against-asphalt sealing of the roof.

Claims

1. A shingle element for roofing, wherein one or more adhesive areas are provided on the top side of the element for securing an overlying shingle member, and the back side is provided with a continuous adhesive area which covers the spine (the back side of the member apart from the tongues), said continuous area being covered with foil to prevent individual elements from adhering to each other when stacked together, the foil comprising two longitudinally extending strips, of which at least the foil strip lying closest to the tongues is a tear-off strip, and wherein there is provided on the top side of the shingle element a continuous adhesive region at or adjacent the back edge of the element

2. A shingle element according to claim 1, wherein the two foil strips overlap each other at coincident longitudinal edges thereof.

3. A shingle element according to claim 1 or 2, wherein the adhesive region at or adjacent the back edge of the shingle element consists of heatsensitive asphalt, and wherein there are adhesive areas on the top side for the tongues, which areas are both heat-and pressure-sensitive.

4. A shingle element according to any of the preceding claims, wherein the adhesive region at or adjacent the back edge and the adhesive areas for the tongues are contiguous, thus forming a joint adhesive area.

5. A shingle element substantially as described herein with reference to and as illustrated in the accompanying drawings.