Vapour Control Layers Flat Roofs

Bs6229 2003 gives advice on vapour control layers in flat roofs and the control of condensation within the building generally.

Vapour control layers flat roofs.

Vapour control layers are normally considered essential under insulation in warm roof constructions to reduce the risk of condensation. We offer vapour control layers suitable for use in ceiling wall window and roof applications timber frame constructions behind vertical cladding and within metal profile clad industrial buildings. The answer to keeping timber framed walls and roofs dry is to use a layer to restrict the flow of moisture but not to try and stop it. Time and time again i see the wrong vaper control layer being used and installed incorrectly.

Iko s vapour control layers are highly durable against water vapour and exhibit excellent mechanical properties. The notion behind a vapour control layer is to install it on the room. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. What is the difference between a vapour control layer and a breather membrane.

Interstitial condensation can happen if warm air from inside th. In this case you need to lay a full vapour barrier on top of your flat roof deck before you lay the insulation and your flat roof covering.