UA121484C2 - Composite roofing panel, sheet thereof and method of covering a roof - Google Patents

Abstract

It is disclosed a composite panel for external cladding, consisting of a pair of opposing sheets with the interposition of a layer of insulating material, at least one of the sheets (10), constituting the external surface of the panel, being essentially flat except in correspondence to the longitudinal sides where bead-like bendings are provided, wherein said substantially flat panel (10) has an external surface coating (10') of weldable protective material extending over the entire surface except on two opposing guard bands (10") in correspondence with the longitudinal sides of the panel, these bands (10") being continuous. There is also disclosed a method of cladded roofing with the panel and a sheet for manufacturing such a panel.

Description

The invention relates to roofing panels, in particular, thermal insulation panels. More specifically, the invention relates to those panels that, for reasons of structural strength and thermal insulation, provide a connection between a metal sheet of a corrugated panel and a smooth metal sheet with an insulating foam layer placed between them.

Prerequisites for creating an invention

The so-called "corrugated heat-insulating panels", i.e. panels containing a set of two sheets of metal, one of which is usually corrugated and the other flat, and which form layers with heat-insulating material of greater or lesser thickness, are known in the art solutions in the field of roofing, which are quite widely known, especially in the industry.

When forming corrugated panels for covering sloping roofs, the corrugated sheet can be installed from the outside or from the inside. In the first case, the corrugated contour of the panel forms parallel channels, which are located along the main axis of the roof slope and are thus designed for the flow of rainwater and facilitate its drainage.

In these cases, the panels are mounted so as to create a slight overlap between the last ridge of the corrugation on one panel and the first ridge of the corrugation of the adjacent panel. This method of installation is designed to prevent water seepage. At the same time, sheet protection is provided simply by using passivation or painting.

In the case of flat roofs, such as those that for one reason or another must have a flat surface or the slope of which is insufficient, the corrugation cannot be installed on the outer side, as it will inevitably create obstacles to free water drainage. Therefore, the panels in such roofs are installed with the flat sheet facing up, in which case it is necessary to provide any means to prevent water seepage between one panel and another panel, since it is impossible to form a flat top layer that is effective against water seepage.

For this reason, the entire surface of the flat sheet is usually covered with a high-strength PVC membrane, which forms a layer that is particularly effective in terms of waterproofing.

Due to the presence of this membrane, immediately after connecting different panels to each other in place. the gap between the panels can also be sealed by applying a PVC strip that is heat-sealed (heat-welded) to the adjacent parts of two adjacent panels.

Such an overlay strip is also called an overlapping strip or "bridge".

In the process of work, all the panels necessary for the formation of the roofing, which can also be very large, are first installed. After the installation is complete, the coating is completely sealed by applying overlapping strips to the gaps on the joint lines of the panels, usually using hot welding. This technology ensures not only ease of installation, but also efficiency of equipment use.

Patent EP1I375770 discloses a known panel of this type.

However, this system has at least two serious drawbacks, one related to installation and the other to manufacturing.

The first disadvantage occurs when the coverage is very large. This problem is caused by the fact that the installation of the panels can take several hours or even days, so the joints remain open for some time while waiting for the stage of thermal welding with the help of overlapping strips, which is performed after all the panels are fully assembled. Thus, if the assembly of the panels takes a relatively long time, weather phenomena can obviously occur that lead to water or even just moisture reaching the surface of the panels, from where it tends to penetrate the layers below through the open spaces between the panels.

The second disadvantage arises under certain production conditions when attaching a flat sheet to

PVC layer immediately after coating or lamination, that is, before bending to give the panel the required shape. In particular, before being fed into the installation for joining the corrugated sheet and the insulating layer (which is usually made of mineral wool or polyurethane foam), the flat metal sheet is subjected to continuous bending in order to form the edges of the C-shaped or O-shaped shape, which are then create profiles to hold the insulating material, as well as to decorate the edge of the panel.

Continuous bending is provided with the help of special bending roller systems, which act on the peripheral areas of the sheet with a significant bending force, also causing significant local deformations at the corners of the bends. This bending process can have a negative effect on

PVC coating.

Other examples of known panels are presented in patents UUMO2005 / 059265 and EP409513, in which the overlapping strip is one piece with the edge of the insulating membrane. In this case, the overlapping strip is made in the form of a piece of strip that extends from the panel, which leads to the emergence of a number of problems both at the stage of production and at the stage of storage of panels.

The essence of the invention

The task of the invention is to propose a new design of PVC panels

With a coating, as well as a suitable installation process to overcome the above disadvantages, facilitate the assembly work and increase the service life when exposed to atmospheric precipitation.

This task is solved thanks to the features specified in the independent claims of the invention, which is attached to this description. A description of the main features of the invention is given in additional claims.

Brief description of the drawings

However, additional features and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment of the invention, given solely by way of example, and are not limited thereto, and are also shown in the accompanying drawings, in which:

Fig. 1 - perspective view from above of the proposed panel;

Fig. 2 - sectional view of two connected and installed panels according to the invention;

Fig. C - a partial perspective view of two panels according to the invention at one stage of connection;

Fig. 4 - a view similar to the view in Fig. 3, at the next stage of implementation of the invention.

Detailed description of the preferred embodiment of the invention

As shown in fig. 1, the thermal insulation panel 1, which is known per se, has a first flat sheet 10 and an opposite sheet 11, which preferably has a wavy shape, between which is placed a layer of insulating material 12, for example, mineral wool or polyurethane foam.

The panel, and thus the corresponding sheets 10 and 11, has two longitudinal sides (right and left in Fig. 1) of undefined length and two upper sides (front and back in Fig. 1) formed when the panel is transversely cut to length, which is equal to the width of the laminated sheet. The two longitudinal sides are suitably machined to hold the insulating material, while the upper sides are rough cut so that the insulating material can be seen.

Sheets are preferably made of a metallic material such as galvanized steel and have

Of variable thickness, usually 0.6 mm to 1 mm when smooth and 0.4 to 1 mm when pre-painted and corrugated.

As shown in the drawings, the corrugated sheet 11 is given a distinct shape by means of special bending equipment, but the flat sheet 10 also has longitudinal outer edges which are bent in a C-shaped or O-shaped shape and form edges for holding the insulating material 12.

The flat sheet has a 10" surface layer or membrane on the outside of the panel, made of PVC or other protective and weldable plastic.

According to the first principle feature of the invention, the surface layer 10" of the protective material does not cover the entire surface of the flat sheet, as in known solutions, but only a part of the flat sheet 10, leaving two continuous peripheral protective strips 10" uncovered near the outer edge of the sheet 10.

The width of these two peripheral longitudinal protective strips is sufficient so that, even after bending and forming the longitudinal trim edges, part of the sheet remains uncovered. However, the width of the two peripheral longitudinal strips is 10" less than half the width of the overlapping strip to be applied at the next stage of sealing the structure.

As can be clearly seen from fig. 1, the panel according to the invention has two longitudinal peripheral strips on which the flat sheet remains open and does not have a protective PVC membrane / protective coating 10".

According to the invention, the partial PVC coating 10" can be applied before the bending stages of the longitudinal edges of the flat sheet 10. Thus, when the peripheral longitudinal strips 10" are left without a protective membrane / protective coating, the bending stage can be carried out efficiently and without interference, without damaging the surface of the PVC coating 10". Thus, the first achieved technical result concerns the panel manufacturing stage.

In addition, the second technical result, which is synergistic, has been achieved in the proposed panel. As shown in fig. 4, two peripheral longitudinal strips of 10" without a protective PVC coating are located next to each other along the seam line between the two panels. In this condition, adhesive tape can be effectively applied along the seam line. Due to the fact that the sheet material in the area of the 10" strips without coating is smooth and stiff, provided good adhesion of the adhesive material usually used on adhesive tapes, while the uneven and soft surface of the 10" PVC coating, on the other hand, makes the adhesion less effective.

In addition to the manufacturing benefits discussed above, the proposed panel has additional synergistic benefits that provide increased installation efficiency.

The ability to effectively stick adhesive tape in the seam area allows you to quickly and easily, without the help of special equipment, create a temporary seal between the panels as they are installed next to each other. Thus, water seepage under the panels can be prevented even before the completion of assembly and final installation of the overlapping strips that create the final seal.

Therefore, the installation method according to the invention involves two separate stages, namely, one stage of panel installation with simultaneous temporary covering of the gap between the panels and the next stage of applying an overlapping strip of finishing coating. At the first stage, the worker, as usual, places the panels close together and fixes them one by one. Fastening of two adjacent panels 1 and 2 can be done in a way that is known in itself, with the help of a retaining plate 3, in which the anchor screw 4 is inserted and fixed under the support frame (Fig. 3).

After the two panels are installed close to each other, the worker immediately, that is, before the installation of the second panel, pre-closes the gap between the panels by placing adhesive tape on the edges of these two panels. As an adhesive tape, you can use a commercial product, for example, aluminum foil tape.

The adhesive tape can adhere perfectly and firmly to the exposed metal surface of the flat sheet panel, establishing a temporary but completely reliable protection suitable for providing the necessary sealing of the seam between the panels at least until the start of the second stage of the installation process, which can take place several days later .

At the end of the installation and fixation of all panels that have a surface to be covered, overlap strips 5 (Fig. 4) are applied, made of material welded to a PVC sheet 10", using the usual hot welding technology. The width of the overlap strips should be greater than the amount 10" wide exposed strips so that they can be welded in the 10" covered area. The temporary sealing tape can be left in place because it does not interfere with the welding process.

Thus, the second stage, which, as mentioned above, is the hot laying of the overlapping strip, can be carried out after the installation of all panels on the roof surface is completed, not

Fearing the penetration of water or moisture into the gaps between the panels between the first and second stages, no matter how long the first stage lasts.

As is clear from the above description, the goals outlined in the introduction are fully achieved, thanks to the use of the proposed sheet and panel with a coating. The proposed solution allows you to bend a flat sheet without damaging its surface treatment. In addition, this configuration includes a mounting technology that is safer and faster even when covering large areas.

However, it is clear that the invention is not limited to the above-mentioned specific variant, which is only one example of its implementation, since several variants are obvious to a specialist, which do not go beyond the scope of legal protection of this invention in accordance with the claims.

In particular, the specific material of the sheet and the coating layer may also differ from the declared material depending on specific needs or with further development of the technology.

Claims (3)

FORMULA OF THE INVENTION 1. The method of covering roofs with a plurality of panels consisting of a pair of opposite sheets with a layer of insulating material located between them, while at least one of the sheets (10), which forms the outer surface of the panel and is substantially flat, except for the longitudinal edges with folds in the form borders, has an outer surface layer/membrane (10) of welded protective material which extends over its entire surface except for two peripheral, opposite longitudinal protective strips (10") corresponding to the longitudinal edges of the sheet, and these strips (10") are made continuous , and the outer surface layer/membrane (10) of welded protective material is applied to a substantially flat sheet (10) before bending to form folds in the form of borders, while covering is carried out in two stages: - in the first stage, each new panel is installed next to panel installed earlier, and the gap between these two panels is temporarily sealed using adhesive tape, which is placed on the intermittent protective strips (10") - at the second stage, at the end of the installation of a plurality of panels, according to the gap between the panels, overlapping strips are thermally welded, the width of which is greater than the total width of two adjacent protective strips (107). 2. The method according to claim 1, in which the adhesive tape is an aluminum foil tape. 3. The method according to claim 1 or 2, in which the welded protective material is PVC. r S is kN xx 1 pe i 4 h her o s" y i vcha a t h more ( y I porey t i r - kh more" sa oh zhy TEENAGERS Fri, h t gYA TINY M. xz 10 Fig 3 m y Y put token y2 0- pin V NN Ffig2 4 i and vok SHI write en a r Yan Pen o Y fot zh v rtrtnnnyly, so I pa kh v: nn v still el Shiya y she I I eat them Fig.Z