Description

This article gives the steps to follow for successfully replacing damaged or thermally inefficient timber-framed windows.

The BRANZ helpline often receives questions about replacing windows in existing openings. Typical questions include whether a building consent is required and, as it can be difficult to comply with Acceptable Solution E2/AS1 to Building Code clause E2 External moisture, how a replacement installation could be detailed.

Scope

This article covers:

• Building Code requirements
• Thermal performance
• Installing a new window
  • Direct-fixed cladding
  • Cavity construction
  • Installing a new head flashing
  • Installing new facings
  • Installing a new window into brick veneer with cavity