11.3.9 Insulation
Insulation shall be suitable for the intended use, correctly installed, and be of a suitable material and thickness to comply with Building Regulations and reduce the risk of surface and interstitial condensation.
Insulation should be:
- in accordance with the design
- installed correctly to minimise the risk of thermal bridging, surface, and interstitial condensation
- installed in accordance with the manufacturer’s recommendations.
The System Manual and design should include control measures to mitigate risk of slump of non-rigid insulation during transport
and site installation.
Where insulation is to be installed to the external/cavity face of the frame, workmanship and tolerances of external walls, particularly at panel joints, should be maintained to minimise:
- reducing the width of clear cavities
- gaps between insulation boards
- ledges between insulation boards forming moisture traps.
Timber frame backing walls
Insulation to volumetric units with a timber frame backing wall should be in accordance with Clause 6.2.15.
Light steel frame backing walls
Insulation to volumetric units with a light steel frame backing wall should be in accordance with Clause 6.10.17.
Last updated: 2nd January 2025