Supply Chain Advice Pack: Internal Wall Insulation - Installation phase
Introduction
Installing IWI to PAS 2035 and PAS 2030 standards involves several technical challenges, particularly achieving full thermal coverage of the walls while avoiding cold bridging (specific heat loss areas in the wall) e.g. junctions with ceilings and internal walls and resultant moisture risks.
Published: November 2025
Contents
Welcome to the Supply Chain Advice Pack: Internal Wall Insulation - Installation phase
This advice pack supports installers by outlining the coordinated approach needed across the installation stage. This pack is the second part of an Internal Wall Insulation (IWI) series. Assessment and design, and maintenance and repairs are covered in other advice packs, which can be found here.
Download the PDF below to access this Advice Pack.
Readers that would like this document in a more accessible format should contact rise@turntown.co.uk.
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