Warm Deck Flat Roof Vapour Barrier

The roof is an unventilated warm roof design finished with a single ply membrane.

Warm deck flat roof vapour barrier.

This could be a 1000 gauge min polythene sheet. If this has not been done then we would recommend that you install one underneath the joists before the plasterboard goes up. We provide a vapour control layer for flat roof installations as well as heavy duty vapour control layers for a warm flat roof. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

Discussion in roofing and guttering started by sam85 21 jul 2017. It has transpired that there is no vapour control layer fitted. A vapour barrier will then need to be installed to reduce condensation in the roof structure. At roofing superstore our choice of flat roof materials includes everything you need to create a long lasting weather proof flat roof that performs and looks good too.

I m in the process of building a warm flat roof for a garden room and need to put down a vapour barrier between the sub deck and insulation. Warm deck flat roof vapour barrier. To use epdm for a warm deck flat roof construction solid closed cell roof insulation such as kingspan or celotex should be placed on top of the roof deck rather than in between the rafters. This quetion is to do with warm roofs and cold roofs presumably the 50mm of insulation on the underside of joists would act as the vapour barrier if taped sealed correctly or if insulation between joists a vapour barrier i e.

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. 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 architect plans stated requirement for a vapour control layer below the insulation or a 3 in 1 insulation board including vapour control layer and an additional foil backed plasterboard. 22 jan 2010 messages.

I was looking to use this vapour barrier from screwfix but not sure if it s suitable for the job it only mentions underfloor heating and laminate flooring in the description. Poly to the underside of joists. Great videos thanks for sharing.