Description

This bulletin looks at thermal bridges in external framed walls and framing fractions and how to reduce the impact in new homes. Thermal bridges can significantly reduce the thermal performance, warmth and comfort of a new home. They can also affect durability. To build homes with lower operating costs and fewer operational greenhouse gas emissions, building practitioners need to reduce thermal bridging.

Thermal bridges can significantly reduce the thermal performance, warmth and comfort of a new home. They can also affect durability.

To build homes with lower operating costs and fewer operational greenhouse gas emissions, building practitioners need to reduce thermal bridging. 

Scope

This Bulletin covers:

1. Introduction
2. The extent of thermal bridging in walls
3. Thermal bridges and Clause H1
4. Determining framing fractions in the build process
5. Reducing moisture risk
6. Reducing thermal bridges in new homes
   1. Secondary insulation layers
   2. Other construction methods and materials - SIPs
   3. Insulating all cavity spaces
7. Light steel framing and thermal bridges
8. More information