Structural Timber Thermal Details: platform of over 1500 free thermal details launched
2nd November 2026
The Structural Timber Thermal Details Platform has just been launched. It’s a free-to-use library of thermal details and their associated psi-values, specifically for timber frame construction.
It has over 1500 thermal details, covering both single family homes and multi-occupancy apartments, and includes:
- five generic timber frame wall systems
- non-habitable and attic trussed rafter systems
- I-Joists
- metal web engineered timber floors.
Hosted on the Structural Timber Association website, the platform is a collaboration between Timber Development UK, Swedish Wood and Knauf Insulation, with input from leading industry specialists Studio Partington Architects and Briary Energy.
While it focuses on timber frame systems, it is intended to accommodate other timber construction methods, such as SIPS, mass timber and proprietary systems, in the future. The provision of thermal details for attic truss systems, and for metal web floors, will of course be of great interest to Trussed Rafter Association members.
“This platform provides a significant library of independently calculated thermal bridge details, together with the information needed to support compliance and design optimisation,” explains Paul Newman, Technical Director, Structural Timber Association.
“By making these resources freely available, we hope to help the industry reduce design risk, improve building performance and encourage greater confidence in the use of structural timber systems.”
Thermal performance is a consideration for all forms of construction. All buildings must be designed to comply with the functional requirements of building regulations, as a minimum standard. This platform is the UK’s first online free-to-use generic structural timber thermal details website.
“This set of details will provide housebuilders and designers with the information they need”
– David Hopkins, CEO, Timber Development UK
“There is an overwhelming need to improve the thermal performance of UK housing stock, to lower energy bills and reduce emissions. TDUK is proud to be supporting this project. It shows the improved performance which can be achieved using timber systems and we hope more housebuilders will choose this approach to make new British homes fit for the future.”
