Does spray foam affect home insurance?

The RICS spray foam consumer guide, which dates from March 2023, gives two simple instructions in its checklist. Ask the mortgage provider whether its lending policy allows such products, and ask the insurance provider whether its policy does. The advice is practical because it puts the question to whoever decides, and their answer binds you whatever any contractor says.

The guide makes no promise that insurers will accept foam or refuse it. It leaves the matter with the policy wording and the insurer's underwriting. That is how we treat it too: we cannot tell you what your insurer will say, and nobody else should claim to.

A phone call is a start, but get the answer in writing. Ask whether the policy covers a roof with foam on its underside. Ask if the foam must be declared as an alteration to the building. Ask about exclusions for damp, rot or condensation damage in a foamed roof, and whether an assessment would change the terms.

Ask, too, what happens if the foam is removed. A policy that excludes foam might revert to normal terms afterwards, but the insurer decides that. Keep every reply with the property records. Renewal time is a natural moment to ask, because the insurer will be reviewing the risk anyway, and any change in your answers at renewal should be recorded as well. If you plan to sell, the buyer's own insurer will ask similar questions, so the paper trail you build now is useful then. The notes on needing a new roof after spray foam show how a roof decision can open a fresh conversation with your insurer.

Roof insurance rests on one idea: policies pay for sudden events, not gradual decline. When the Financial Ombudsman Service looks at a storm complaint it weighs up whether weather was the real reason for the damage, or whether the roof would have failed regardless. A complaint tends to fail when the roof had been deteriorating and the owner was aware. Which? makes a related point, that ordinary policies often exclude gradual wear, rain finding its way in through a neglected roof being the classic case.

Foam complicates this, because the underside of the roof is hidden. If water has been seeping in for years, the foam may have concealed it, and an insurer could point to that. We do not deal with insurance claims, and nobody should promise you a payout. What we can do is photograph the roof so you hold evidence of its condition. See spray foam on the underside of tiles for how foam sits against a covering.

Picture the file you would want if an insurer, buyer or surveyor asked questions in five years. It holds the installer's paperwork if you still have it, the date the foam went on, the foam type, any condensation check made before installation, and every photograph of the roof void. After any removal, add the survey pictures, the quotation, the invoice and the written guarantee, and file a copy of any letter from the insurer alongside them.

Do not try to strip foam yourself to produce evidence. Read why DIY spray foam removal is not advised first, since cutting into a roof can create the very damage you are trying to avoid. Taking a few dated pictures from the loft hatch is safe and often enough to start a conversation.

The insurance trade body's guidance during Storm Eunice in 2022 ran in a clear order: get in touch with your insurer quickly, arrange emergency repairs only if they are needed to stop things getting worse, check with the insurer before doing so, and hold on to every receipt. That sequence suits a foamed roof that starts to leak too: report it, make it safe, and keep the paperwork.

When water is coming in, leaks and storm damage get our attention ahead of routine jobs, and a temporary make-safe against further rain comes before any lasting repair. Nothing is promised on timing, but the order of work is always the same. Telling your insurer early protects your position, because a late report can be argued to have let the damage grow. Keep a note of dates, phone calls and who you spoke to, and photograph any ceiling stains before anyone cleans them.

A temporary patch is not the end of the matter. If foam sits under the damaged area, the repair has to be planned around it, and the timbers beneath should be checked for moisture once the weather allows. Do not let a quick fix hide a slow problem.

If the insurer has declined, or you simply want to know the state of the roof before approaching them, a survey is the place to begin. We look over the roof, photograph the timbers wherever they can be reached and send a quote in writing that sets out the work, and the process for removing spray foam is explained before anything starts.

If we carry out the job, a decade of cover on our workmanship comes to you in writing, and we leave nothing behind. That guarantee is not insurance, and your home policy remains a separate matter between you and your insurer. Start from our spray foam insulation removal page.