alwitra continuous vents form the top end of ventilation lines (downpipes in the building) and alwitra cold roof vents ensure air circulation of waterproofed vented roofs. For the repair of roof sealings without removing the top end of ventilation lines, alwitra reroofing vents are applied.
The vents

• are two-piece or one-piece and have a vent cowl,

• are made of integral PU foam with a PE pipe and

• have a welding flange for homogeneous flashing to synthetic (EVALON^®) or elastomeric (EVALASTIC^®) roofing membranes or an adhesive or loose/fixed flange for flashing to vapour control layers.

alwitra flat roof vents form part of a system of technically and technologically integrated product groups for intelligent roofing solutions.