Vapour Control Layer Suspended Timber Floor

This helps to minimise underfloor condensation and hence the risk of mould or decay while improving the thermal efficiency of your floor and building.

Vapour control layer suspended timber floor.

Make sure that the air vents in the crawl space below the membrane and insulation are not blocked and that there is plenty of ventilation to help remove any moisture under the floor. Rising moisture is a huge issue for many people. Tyvek supro membranes are sturdy and durable. They are vapour open yet greatly reduce air flow when correctly installed.

This ensures air leakage is minimized and the risk of interstitial condensation is further reduced. For optimum results when addressing heat loss through a suspended timber floor the specification needs to ensure that high levels of thermal performance delivered by the insulation material are combined with airtightness and moisture control while at the same time facilitating a degree of breathability. To answer your question introducing a vapour barrier to the underside of the floor joists would be a complete waste of time that is other than to assist in the air tightness of the building which is another bone of contention whereas introducing a vapour barrier over the top of the floor joists may well provide some long term benefits by reducing the amount of water vapour introduced to the timber. Tyvek membranes are ideal for suspended timber floor construction.

Breather membranes are positioned to the outside of the insulation acting as a weather barrier while still allowing moisture particles to escape from the inside. Finally an intelligent airtightness and vapour control layer such as pro clima intello plus or a vapour check such as pro clima da must be applied and sealed on top of the floor joists prior to the floor boards being reinstated. There is a whole host of ways that you can do this yourself or if you choose to get the professionals in they ll do it for you. We need to make sure that the ventilation under the suspended timber floor is adequate to stop moisture build up and damage to joists and floorboards.

They provide adequate support for the insulation and are recommended for use in suspended timber floor constructions.