What cavity wall insulation paperwork should buyers request in England and Wales?
Guarantee schemes, bead injection records, and damp investigations that reduce lender and surveyor friction after historic cavity fill.
Published: 18 Apr 2026 · Updated: 18 Apr 2026 · 10 min read
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Why warranties matter
Some lenders and valuers treat cavity wall insulation as a known risk class because issues correlate with installation era, exposure, and detailing.
What to look for
Installer identification and install date.
Cavity guarantee paperwork where a scheme applied.
Damp investigations if there were complaints and remedial works.
For sellers
If you have a healthy pack, upload it early. Buyers prefer plain narrative over partial screenshots.
Using Property Passport UK
Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.
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