Framing for secondary insulation to external walls - Build 197 (2023)
- Abbreviation
- Framing for secondary insulation to external walls
- Valid from
- 1/08/2023
- Information provider
- BRANZ Limited,
- Author
- David Hindley
- Information type
- BUILD article,
- Format
- Website, PDF,
Description
A secondary layer of insulation to the internal face of external walls can vastly improve the walls’ thermal performance, but bracing and protection against moisture movement must be provided for.
There are three main options for a secondary insulation layer in the BRANZ House insulation guide 6th edition, shown here in Figures 1–3. All these options have been used in houses consented and built in Aotearoa New Zealand in recent years.
Scope
In this article:
- The framing
- Bracing requirements
- Protecting against moisture ingress
- The payoff