Retrofit technical considerations, Support for businesses delivering retrofit

Supply Chain Advice Pack: External Wall Insulation – maintenance, repairs and warranties

Introduction

The maintenance and repair of External Wall Insulation (EWI) installed under PAS 2035 and PAS 2030 involves several interrelated responsibilities shared between the installer/retrofit coordinator, the system manufacturer and the landlord and resident. These relationships and obligations are defined by the PAS standards and by maintenance repairing and warranty obligations arising from system manufacturer’s warranties and industry guidance.

Published: 16 March 2026

These obligations are intended to ensure the long-term performance, durability, and safety of the installed EWI system. Specific obligations will arise from design and installation phases of the projects. Information will be identified or collated during the post contract/pre practical completion phase. Contractors may offer to remove post completion obligations from stock owners via build and maintain offers.

In addition to the warranty and guarantee requirements practical issues will also arise. For example, in an ideal world residents and other service operatives will use approved fixings to attach things, e.g. hanging baskets, fencing and satellite dishes etc, to an EWI system. However, this is often not the case and will need to be kept under review. This advice pack will outline the key considerations when considering the maintenance and repair of installed EWI systems.

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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