What RICS Surveyors Look for When They See Spray Foam in a Loft

When a RICS surveyor inspects a UK property and finds spray foam in the loft, certain points usually appear in the report. Understanding them in advance helps you prepare a sensible response and avoid losing a sale or remortgage application.

Concealment of roof timbers

Surveyors must be able to inspect the timbers that support the roof. Spray foam applied directly to the underside of the rafters often hides those timbers, making it impossible to confirm their condition without intrusive work.

Ventilation and condensation risk

The Building Research Establishment and most UK lenders treat ventilation as a key factor. Foam that blocks the natural airflow at the eaves can be flagged in a report even when the timbers appear sound.

Installation paperwork

Reports often note whether building control approval was obtained, whether a warranty exists and whether the installer was registered with a recognised scheme. Missing paperwork raises questions and can affect valuation.

Responding to a survey report

A response that says “we will get a quote for removal” rarely solves the lender’s concern. A response that includes an independent written assessment, ventilation evidence and a credible plan tends to perform much better.


Need Independent Advice?

The National Spray Foam Advisory provides free, written guidance to UK homeowners affected by spray foam insulation. If you would like a tailored view of your situation, download our free guide or contact us for a no-obligation advisory pack.

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