Headquarter
Brühler Straße 60
Basell Polyolefine GmbH – B 100
D-50389 Wesseling
Phone +49 (0) 22 36 / 3 78 59 0
Fax +49 (0) 22 36 / 3 78 59 99
pegon GmbH
The Polymer Source
Siemensstraße 18
D-50374 Erftstadt-Lechenich
T +49 (0) 22 36 / 3 78 59 70
F +49 (0) 22 36 / 3 78 59 99
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![[ Serie Flachdachmarkt Teil 2 ] Considerable advantages for constructors and clients](http://www.lucobit.de/icoaster/files/cms__serie_flachdachmarkt_teil_2_considerable_advantages_for_constructors_and_clients.png) |
[ flat roof market ] | INPLASTICS
Every client expects the highest possible quality in the sealing of flat roofs. The conditions, however, are oftentimes far from being perfect. It is important for the constructor that the roof sheeting is safe to handle even under the most difficult circumstances. On site, there is no room for experimenting about the most suitable way to handle the material so this edition of inplastics features a comparison of the various possibilities.
Nowadays, when choosing a material, one has the choice between bitumen or plastic roof sheeting. Plastic roof sheeting is generally applied in a single layer. Roof sheeting from bitumen can be laid safely and solidly by homogeneously sealing the edges - mostly using an open flame in parts using hot air. Only a solid edge-fusion can guarantee a solid sealing. Bitumen roof sheeting is mostly applied in multiple overlapping parallel layers and eight cm overlapping joints. They are glued over their entire surface using one of the following methods: cold adhesion, welding procedures or casting methods. In the most commonly used welding procedure, a propane burner heats up the underside of the bituminous felt. The partly melted sheeting is then rolled in using light pressure. This method can also be used with slightly wet surfaces. The cold adhesion method uses roof sheeting produced with special pressure- sensitive cold glue. The peel-off film on the underside is removed and glued cold to the surface. This casting method is usually considered dated and therefore rarely used. Plastic sheeting are installed in one layer. does not have to be glued together in two layers. They are waterproof thanks to the impermeably structured profiles. Pure plastic sheeting is usually, depending on roof structure, applied mechanically, loose, or with ballast. When laying them, one has to pay careful attention to the alignments and the connection of the seams.
Plastic roof sheeting is usually welded with hot air e.g. with an automatic welder. The sheeting is laid with a slight overlap (e. g. 5 cm), plasticized with hot air and then homogenously connected. The optimal welding properties depend on the type and quality of the material as well as the surrounding temperature and the level of humidity. Tests of independent flat roof expert W. Ernst have shown that roof sheeting from ECB and TPO/FPO have a very wide welding window. Even in bad weather conditions they can be installed on wet and cold surfaces. Due to its wide welding window roof sheeting from ECB and TPO/FPO is said to be especially "compliant" in its handling so that it is relatively easy to avoid processing defects. The homogenous connection of the material by using hot-air welding guarantees optimal safety. The final control of the joints is easy: if the raised welding bead is perfectly formed the joints are most likely connected perfectly as well. Furthermore W. Ernst recommends to carry out a peelt test along and across the weld. The sheeting can be installed in little time, which is very cost-effective. Large surfaces can be sealed with roof sheeting of 2 meters width in no time. Finally the light weight of 1,5-2 kg/m2 - depending on the depth of the sheeting and granted that it is applicable in a single layer- guarantees costsavings since roof construction will be lighter and the expenses for transportation to and on the building site are about a quarter lower compared two layer sheeting (2,500 m2). In numbers this means that one truck could transport some 10,000 m2 of plastic roof sheeting.
The advantages - plastic sheeting at glance
- suitable for fast handling
- due to a wide welding window processing defects can be minimized
- plastic sheeting can also be installed in bad weather conditions
- hot-air welding guarantees optimal on-site safety
- simple visual control of welded joints (raised welding bead), Peel test
- large surfaces can be sealed with sheeting of up to 2 m width
- low weight of 1,5-2 kg/m2, as well as one-layered installation make for fewer material requirements i.e. lower costs * lower costs for transport to site: up to 10,000 m2 per truck
- suitable for redevelopment and new building
- permanent resistance to aging and there for long-term use
- resistantly against biological and chemical influence
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