Breather membranes for timber frame walls
All timber frame walls are designed to 'breathe'. The term 'breathe' refers to the ability of a wall to allow water vapour to diffuse through the structure. This is an important consideration to the long term durability of the timber structure.
A breather membrane restricts the passage of liquid water, whilst allowing water vapour to pass through.
This Wood Information Sheet (WIS) covers a number of topics surrounding breather membranes including the requirements of a breather membrane, the considerations which must be made to mitigate risk of condensation, and the measures which must be taken to mitigate heat loss caused by convection currents.
- Condensation risk
For queries about this technical document, please get in touch with its authors via BM TRADA’s Technical Helpline on +44 (0)1494 569601 or email email@example.com.
A paper/digital copy of this Wood Information Sheet is available in the BM TRADA Bookshop, which also hosts additional specialist timber publications.
This Wood Information Sheet (WIS) outlines the materials normally specified for conventional timber frame buildings. Some variations will occur according to the structural design and detailing requirements of specific projects. Many of the components are also used in innovative forms of construction such as engineered stud and twin stud walls,...
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