Flat Roof Vapour Barrier Membrane

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.

Flat roof vapour barrier membrane.

Reduce heat loss and boost energy efficiency with market leading vapour control layers vapour barrier membrane and vapour control barriers. A roof design that includes an adhered roof membrane with multiple layers of insulation with board joints offset and staggered over a vapor retarder air barrier helps lower the risk that air and the moisture it carries will infiltrate the roof system. A flat roof vapour barrier such as iko s mvp modified vapour protector offers appropriate moisture protection. Colour of outer membrane light coloured membranes reflect more sunlight and therefore have lower levels of heat transfer to the roof than the same roof with a dark membrane.

Including flat roof vapour barrier for extra secure roofing solutions. This is different to breather membranes which allow the movement through the membrane to ensure water vapour can leave the roof space. You ll find pitched roofing products here. There is no requirement for any air gaps.

Insulation location is it above the deck within the deck under it or a mix of both. A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. Below the main roofing layers are the substructure wood concrete or metal insulation plywood underlays vapor barriers etc. Bituminous vapour retarders asphalt mixed with felt or fiberglass or non bituminous vapour retarders plastic.

Looking for pitched roof materials. Vapour control layers vcl prevent any water from entering or leaving the roof space ensuring that moisture does not transfer between layers or through walls or roofs and build up within the roof or wall space. Provided your vapour control layer is intact then there should not be any risk of condensation. A vapour barrier will then need to be installed to reduce condensation in the roof structure.

Roofing membrane 18mm plywood or osb. Built up roof membranes bur built up roof membranes referenced by the acronym bur have been used reliably on flat roofs for many decades. For all warm flat roofs a fully intact vapour barrier would be required on the room side under the insulation.