Choosing a Timber Frame Cavity Wall Construction

Timber frame is a popular building construction method with a sustainability agenda and a move away from masonry. Choosing a timber frame cavity wall construction is a key decision that will influence the thermal performance, moisture management and fire safety of your home.

The timber frame internal wall consists of an inner leaf of structural studs, a primary layer of insulation and an external cladding system. The cladding system needs to be designed and installed to meet the building regulation requirements. The cladding can impact the moisture movement within the timber wall structure, air leakage and the thermal performance of the building. URL

A drained and ventilated cavity behind all types of timber frame cladding allows the water vapour that travels through walls to vent away from the timber elements without forming damaging interstitial condensation. Condensation in timber frame cavities is a significant problem if not addressed and can lead to the timbers decaying, which can have serious impacts on the stability of the structure.

Insulating Your Timber Frame House: Tips for Energy Efficiency

National building regulations stipulate where and what type of cavity barriers are required in timber frame construction. Working with timber frame consultants, such as BM TRADA’s FrameCHECK, during the design stage will help to ensure that your project adheres to the relevant statutory documents.

Insulation is required in timber frame walls and it is crucial that the product you choose has third-party certification to confirm it complies with the requirements of the building regulation. BM TRADA’s range of non-combustible timber frame insulation is suitable for use in cavity wall construction. It is friction-fitted between timber studs and partially fills the external cavity to improve the U-value of the wall.

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