alwitra® cold roof vents can be welded directly to the corresponding roof waterproofing without any additional materials.
- The vent cowl, together with the weather cap, provides rainproof protection of the vent pipe
- At the lower end of the vent, a drip pan will collect any condensate, which will eventually evaporate. This is to prevent or reduce moisture penetration of the thermal insulation
Cold Roof Vents
The alwitra® Cold Roof Vents facilitate air circulation in the cavity of ventilated roof structures, so called cold roofs. Only sufficient air exchange over the whole area will ensure longterm functionality of a cold roof.
As used on landmark architecture throughout the world
40 years experience with waterproofing systems in the UK
Advantages
- The EVALON®® connecting flange is factory fitted to the vent pipe and doubly secured by means of an external air cushion cell (diving bell effect) protecting the connection
Applications
- Suitbale for both warm and cold roofs
Product Details Back to top
Product Specification
| Material: | PVC pipe with condensate drip pan, vent cowl and weather cap made of PP |
| Colour: | Black, with factory-fitted connecting flange in the colour of the waterproofing membrane |
| Height above the waterproofing (excl. vent grate/weather cap): | 300 mm |
| Outer pipe diameter: | 125 mm (DN 125) |
| Outer connecting flange diameter: | 480 mm |
| Outer flange diameter: | 240 mm |
| Ø of screw holes at flange: | 210 mm |
| Flange width: | 60 mm |
| Installation opening: | Ø 150 mm |
| Installation depth from flange: | approx. 140 mm |
| Vent cross section: | ~ 110 cm2 |
Technical Drawings
