SR484 Assessing retrofitted external wall insulation techniques

Abbreviation
SR484 (2023)
Valid from
1/08/2023

Information provider
BRANZ Limited
Author
Ian Cox-Smith, Yu Wang and Mark Jones
Information type
Study report
Format
PDF

Description

Results of this study apply to the retrofitting of external walls with direct-fixed claddings without wall underlay.

Highlights:

  • The pan method (paper or synthetic) resulted in water getting onto the framing.
  • Maintaining a 20 mm separation between the back of the cladding and the insulation was not able to prevent water transfer to the insulation and framing and limited the thickness of insulation installed but was observed to clearly perform better than the pan method. Maintaining a separation continues to be recommended over the pan method.
  • Using drainage plane mesh in conjunction with an underlay was the most reliable method and allows for thicker insulation to be used in retrofitting compared with maintaining a 20 mm separation.

For assistance with locating previous versions, please contact the information provider.
View on Information Provider website Download this resource (PDF, 3.1MB)
For assistance with locating previous versions, please contact the information provider.
This resource is not cited by any other resources.

SR484 Assessing retrofitted external wall insulation techniques

This document is not CITED BY any other resources:

SR484 Assessing retrofitted external wall insulation techniques

Description

Results of this study apply to the retrofitting of external walls with direct-fixed claddings without wall underlay.

Highlights:

  • The pan method (paper or synthetic) resulted in water getting onto the framing.
  • Maintaining a 20 mm separation between the back of the cladding and the insulation was not able to prevent water transfer to the insulation and framing and limited the thickness of insulation installed but was observed to clearly perform better than the pan method. Maintaining a separation continues to be recommended over the pan method.
  • Using drainage plane mesh in conjunction with an underlay was the most reliable method and allows for thicker insulation to be used in retrofitting compared with maintaining a 20 mm separation.

View on Information Provider website Download this resource (PDF, 3.1MB)
SR484 Assessing retrofitted external wall insulation techniques
Description

Results of this study apply to the retrofitting of external walls with direct-fixed claddings without wall underlay.

Highlights:

  • The pan method (paper or synthetic) resulted in water getting onto the framing.
  • Maintaining a 20 mm separation between the back of the cladding and the insulation was not able to prevent water transfer to the insulation and framing and limited the thickness of insulation installed but was observed to clearly perform better than the pan method. Maintaining a separation continues to be recommended over the pan method.
  • Using drainage plane mesh in conjunction with an underlay was the most reliable method and allows for thicker insulation to be used in retrofitting compared with maintaining a 20 mm separation.
View on Information Provider website Download this resource (PDF, 3.1MB)
This resource does not cite any other resources.

SR484 Assessing retrofitted external wall insulation techniques

This resource does not CITE any other resources.
Feedback