alwitra GmbH products

The EVALASTIC® EPDM roofing membrane in light gray and white is the first roofing membrane to bear the German Federal Government`s environmental label – the Blue Angel. The light gray and white EVALASTIC EPDM roofing membranes demonstrably and transparently meet the highest environmental standards, exceeding legal requirements.

For 50 years, the homogeneous EVA waterproofing membrane EVALON has been demonstrating convincing performance all over the world on more than 160 million square meters of roof surfaces. EVALON is a high-quality synthetic EVA waterproofing membrane for single-layer roof waterproofing using hot air or solvent welding in the overlap area. One roll of alwitra EVALON synthetic waterproofing membrane is enough to seamlessly waterproof up to 50 m² of flat roof. Quick and easy. From one roof edge to the other, ensuring optimal protection for a long, long time. The comprehensive range of system accessories and preformed details perfectly fits any roofers’ requirements.

What good is excellent work without a sophisticated finish? With high-quality alwitra roof edge trim profiles made of noncorrosive aluminium, this issue does not even arise. Time-saving installation, smart and clean sealing, tension-free and flexible flashing with guaranteed durability – what a great finish!

The rainfall in our latitudes places high demands on the waterproofing and statics of flat roofs. To ensure that everything runs smoothly, we offer a suitable system in the form of alwitra roof drains. Available in vertical and horizontal versions, for cold roofs, inverted roofs and classic warm roofs.

The alwitra parapet drain W75 was specially developed for gravity (emergency) drainage through the parapet and comes ready to use including three components: Drain, stainless steel pipe and custom-fit insulating body. The connection to the roof waterproofing is made via the two-part emergency drain connection with an accumulation height of 20 - 40 mm or via the screw ring, similar to the alwitra roof drains and extension elements. The corresponding connection collar made of EVALON® or EVALASTIC® is included in the scope of delivery, as is the aluminium base plate for a secure connection to the vapour barrier.

Heavy rain, hail and storms, plus a lot of leaves - when the main flat roof drainage system reaches its limits, reliable emergency drainage is of the essence. In such cases, alwitra emergency outlets provide peace of mind: reliable drainage, even during torrential rain. Particularly, against the backdrop of increasingly extreme weather conditions, this is simply a good idea.

As emergency overflows, alwitra water spouts are an important component of our roof and emergency drainage system for roofs with alwitra roofing and waterproofing membranes. In the event of heavy rainfall, our water spouts ensure that even large quantities of water can drain away without damage. They can be quickly and easily connected to the EVALON or EVALASTIC roof waterproofing thanks to the factory-fitted connection collar.