Timber frame cavity wall is a construction method that can be found in modern timber framed properties built after the late 1960s. A timber framed property constructed in this way may not look outwardly any different to a traditional brick built house but the internal walls will need careful inspection if electrical wiring is to be run through them.

Timber framed construction is an extremely popular way to build new homes and it offers great design flexibility, especially in terms of the positioning of windows and doors. One of the main reasons behind this popularity is the energy efficiency of timber frame construction compared to masonry. However, there is an issue associated with the use of cavity wall insulation in timber framed houses which has the potential to cause damage and damp problems.

Timber Frame Cavity Wall Insulation: Key Considerations and Benefits

If the popular method of retro blown cavity wall insulation is used on a timber frame property this can cause condensation within the cavity which will ultimately result in the wood rotting or steel corrosion. There are other methods of insulating a timber framed property which eliminate this issue and can be carried out without damaging the internal structure of the building.

It is essential to use a product such as Mannok Therm Wall / MW insulation boards which are faced with a low emissivity composite foil facing on both sides of the board and can be installed over the studs. A vapour control layer (AVCL) should also be fitted across the whole of the stud face including rails, studs, reveals and lintels. A service cavity can be formed on the interior by installing battens on which plasterboard is bonded to, this allows electrical and other services to be run through the wall without compromising the vapour control layer.