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Il compound costituente la massa impermeabilizzante delle membrane GUMMIVAL VTP è formato da una mescola di bitume distillato residuo vuoto modificato con polimeri elastoplastomerici a base di polipropilene atattico, polipropilene isotattico, compatibilizzanti sintetici e filler inerti stabilizzanti. Il compound è resistente ai raggi UV, termicamente stabile e particolarmente flessibile alle basse temperature.
The reinforcement used for GUMMIVAL VTP membranes is made up of a non-woven polyester mat combined with reinforced glass fiber and glass fabric, which gives to the product very good mechanical and breaking elongation characteristics, as well as excellent dimensional stability. Such characteristics allow to use these membranes also on mechanically and thermally stressed surfaces.
The GUMMIVAL VTP membrane is treated on the upper side with non-stick filler; other finishings such as polymeric film and non-woven may also be used. The GUMMIVAL MINERALE VTP membrane is finished on the upper side either with natural or coloured slate granules or with ceramic granules. The lower side of both of them is finished with PE torch-on film; other finishings such as aggregate, polymeric films, non-woven non-stick polymers may also be used. All self-protected slate bitumen membranes are subject to variations in color due to exposure to atmospheric agents. However, these variations will tend to gradually become uniform over time.
The laying deck shall be clean, smooth and dry. For a better adhesion it may be previously treated either with VERVAL PRIMER (solvent based) or with ECOPRIMER (water based). The membrane is then laid by melting the lower side with light propane gas flame. Edges shall be overlapped, always by torch, by at least 10 cm. on the sides and 15 cm. on top so that the roofing watertightness is granted.
The waterproofing compound of GUMMIVAL VTP membranes is made up of a mix of empty residue distilled bitumen modified with elastoplastomeric polymers based on atactic polypropylene, isotactic polypropylene, synthetic rubber and stabilizing aggregate fillers. The compound is UV rays resistant, thermally stable and particularly flexible at low temperatures.
High performance APP modified bitumen membrane for roofing works. This product is designed for both new roofing works and refurbishment works. This product is also approved for foundation waterproofing works. Base layer for multi-layer roofing systems according with EN13707 for flat roofs. Layer for foundation waterproofing works according with EN13969.
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APP modified bitumen membrane. This product is designed for both new roofing works and refurbishment works. This product is also approved for foundation waterproofing works. Base layer for multi-layer roofing systems according with EN13707 for flat roofs. Layer for foundation waterproofing works according with EN13969.
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APP modified bitumen membrane for roofing works. This product is designed as top layer in multi layer waterproofing systems, for both new roofing works and refurbishment works. It is also used for pitch roofing works. Top layer in a multi layer waterproofing systems according with EN13707 for flat roofs. Layer for pitch roofs according with EN13859.
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