Flat Roof Insulation Vapour Barrier

A vapour barrier will then need to be installed to reduce condensation in the roof structure.

Flat roof insulation vapour barrier.

We are insulating a flat roof with tapered rigid insulation over a moisture barrier and then capped with modified bitumen. However note that one should seal the seams here as well. A vapour control layer helps you shield your building from the consequences of condensation condensation is generated when warm moist air rises and condenses into a liquid on contact with the cooler areas above the insulation. The notion behind a vapour control layer is to install it on the room.

Vapour control layers vcl. A flat roof vapour barrier such as iko s mvp modified vapour protector offers appropriate moisture protection. A flat roof should be designed to minimise condensation and a condensation risk analysis should be undertaken taking into account positioning of insulating materials vapour control layers ventilation thermal insulation and the choice of materials. Including fibreglass roof kits torch on felt and liquid rubber products everything you need for flat roofing is in one place.

A vapour control layer or vcl on a warm flat roof sits between the roof decking and the insulation. Next to that you may also buy a moisture regulating vapour barrier membrane that can manage the damp even better. However we lose r value where the taper is thinnest and need to insulate under the sheeting. The insulation and vapour barrier can be mechanically fixed using fasteners and washers or a self adhesive vapour barrier such as alutrix can be installed with insulation bonded on top using pu adhesive battens.

Bituminous vapour retarders asphalt mixed with felt or fiberglass or non bituminous vapour retarders plastic.