Underlay membranes for example - referred to as sub-roofing membranes in Switzerland and Austria - prevent driving rain and drifting snow or dripping condensation from penetrating through the joints of the roofing into the roof structure and the thermal insulation.ĭepending on the quality of the additionally taken measures, they may also be used as temporary coverage for the temporary protection of a roof area. The sub-roofs, underlays and linings are referred to as additional measures or, more amateurishly, as a second level for the water drainage. Roof coverages cover each other like scales and are considered "rainproof". In the extensive product portfolio offered by DÖRKEN, there is a large selection of self-adhesive, waterproof, and vapour-permeable roof underlay and lining membranes available. We have the suitable material for every requirement you may have when it comes to the construction of efficient and insulated roofs with coverage. Thanks to our willingness to innovate and our longstanding expertise, we can now offer a very wide range of products meeting a wide variety of requirements. In this context, the higher density level of the fibre fleece ensures more strength and a significantly increased light protection. 100% of the conception and manufacturing are carried out in Germany!ĭÖRKEN has a wide variety of manufacturing technologies, such as the innovative technology BiCo. This centre is one of the largest investments in the history of our company.Īll DELTA ® roofing membranes are developed, optimized, and continuously inspected during the production process by highly qualified employees of the company DÖRKEN in the area of research and development. Since 2015 we have also had one of the most modern plants in Europe for spun bond production in Hagen-Vorhalle, which is being expanded into the so-called “Competence Center Membranes”. As a Europe-wide quality and technology leader in the branch of membrane systems, we manufacture all our roofing membranes in Germany at our headquarters in Herdecke.
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