Vapour Control Layer Flat Roof

The flat roof has 2 roof lanterns.

Vapour control layer flat roof.

A question for the experts. If this has not been done then we would recommend that you install one underneath the joists before the plasterboard goes up. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

I have been looking through insurance and they seem to ask about type of flat roofs. Hi i m in the process of building a single story flat roof extension. I have a 3 layer. The vapour control layer vcl often overlooked underrated punctured adlib and sometimes even completely omitted mainly because we re just not sure if it really is all it s cracked up to be after all even if we leave it out altogether the roof shouldn t leak right.

Sika sarnafil watchmead welwyn garden city al7 1bq 01707 394 444. However the cross ventilation does not completely remove the moisture vapour in the ceiling void and a vapour control layer sealed at joints and penetrations is required under the insulation and over the plasterboard to provide a barrier against moisture vapour rising up from the room below. We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. The type of 3 layer roof.

With any warm flat roof detail such as this a vapour control layer should have been laid on top of the roof deck underneath the insulation. The notion behind a vapour control layer is to install it on the room. Vapour control layer for a cold roof. A vapour control layer is designed to catch this vapour preventing it from condensing on the insulation or elsewhere in the loft space or attic.