![Cold Roof Vents](https://www.alwitra.co.uk/media/images/uploaded/products/31/cold-roof-vents.120.full.jpg)
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.
![Worldwide](https://www.alwitra.co.uk/media/images/uploaded/worldwide.1.featured.png)
As used on landmark architecture throughout the world
![almost 40 years experience with waterproofing systems in the UK](https://www.alwitra.co.uk/media/images/uploaded/almost-40-years-experience-with-waterproofing-systems-in-the-uk.151.featured.png)
Almost 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
![Cold Roof Vents](https://www.alwitra.co.uk/media/images/uploaded/products/31/cold-roof-vents.148.full.jpg)
![Cold Roof Vents](https://www.alwitra.co.uk/media/images/uploaded/products/31/cold-roof-vents.149.full.jpg)