alwitra® cold roof vents can be welded directly to the corresponding roof waterproofing without any additional materials.
- The vent cowl, combined with the protective weather cap, shields the vent pipe against rain ingress.
- At the base of the unit, an integrated drip tray captures any condensation that forms, allowing it to evaporate gradually. This helps minimise the risk of moisture reaching and compromising the thermal insulation.
Cold Roof Vents
The alwitra® Cold Roof Vents are designed to promote airflow within the void of ventilated roof constructions, commonly referred to as cold roofs. Effective, continuous air movement across the entire roof area is essential to maintaining the long-term performance and reliability of a cold roof system.
As used on landmark architecture throughout the world
40 years experience with waterproofing systems in the UK
Advantages
- The EVALON®® connecting flange is pre-installed on the vent pipe during manufacture and reinforced with an external air-cushion chamber. This ‘diving bell’ effect provides additional protection to the connection, helping maintain a secure and reliable seal.
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
