Flat Roof Vents
Flat Roof Vents

Cold Roof Vents
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

Soil Vent Pipes
The alwitra® soil vent pipe forms the upper end of vent pipes protruding over low slope roofs with waterproofing of any constructional type up to DN 125 (OD 125).
- The soil vent pipe consisting of one single pipe extends over the roof build-up without any joints and is connected to the downpipe DN 125 (OD 125) and DN 100 (OD 110) below the roof structure by means of the included reducer.
- A corresponding reducer (125/75) is available for downpipes DN 70 (OD 75)
- The connecting flange can be made with EVALON®