Can I sell a house with spray foam insulation?

Yes — but usually not to a buyer who needs a mortgage, because around a quarter of major UK lenders refuse to lend where spray foam is present. Your realistic routes are certified removal, specialist assessment and documentation, or a cash buyer who prices the foam in from the start.

Why won't lenders give a mortgage on a house with spray foam?

Foam applied to the underside of the roof blocks the ventilation a pitched roof is designed to have, can trap moisture against the timbers, and stops a surveyor inspecting them. RICS has warned it can reduce a property's value or make it unmortgageable in a lender's eyes.

Do I have to remove spray foam before selling?

Not always. Certified removal costs around £40 per square metre and quotes vary widely. In some cases a specialist inspection and proper documentation has satisfied a lender without removal. Selling to a cash buyer needs neither — the offer is simply made knowing the foam is there.

Spray foam in the loft

Your buyer's lender said no because of the spray foam. Here's why — and how you still sell.

Around 250,000 UK homes have it, a lot of it installed under government-backed schemes by owners doing the sensible thing. Now surveyors flag it, a quarter of major lenders won't touch it, and buyers vanish at the survey. None of that means the house can't be sold.

250,000UK homes estimated to have spray foam insulation (RPSA/PCA, via the House of Commons Library)

1 in 4major UK lenders refuse to lend where spray foam is present — and no equity-release lender will (HomeOwners Alliance)

£40/m²typical certified removal cost — with real quotes varying so widely that one owner was asked £17,000 to remove foam that cost £12,000 to fit

What the surveyor actually sees

This is the drawing that explains the whole problem. Tap each number — the objection isn't really the foam. It's what the foam stops anyone from seeing.

1The foam layer

Sprayed against the underside of the roof, usually to cut heat loss — often under schemes like the Green Homes Grant, often in good faith, sometimes sold hard to older homeowners. Open-cell or closed-cell matters less to a lender than the fact it's there: either way it bonds to the roof structure and can't be casually lifted for a look.

2The timbers it hides

A surveyor's job at the roof is to inspect the rafters. With foam over them, they can't — and what can't be inspected can't be passed. RICS has warned that spray foam can "reduce the value of the property" and "even render a property un-mortgageable in the eyes of a lender". If the timbers were already damp when the foam went on, the foam sealed the problem in with them.

3The ventilation it blocks

A pitched roof is designed to breathe: air moves through the loft and carries moisture out. Foam across the underside of the roof can close those paths, so moisture that would have dried out instead sits against the timber. That's the surveyor's real worry — not the insulation, the slow damp problem it can create and then conceal.

4What the surveyor writes

"Spray foam insulation present — further investigation required." From there the lender's valuation is qualified or zero. TSB, Skipton, the Co-operative Bank, Principality and Aviva (equity release) are among those that decline outright; about a quarter of major lenders refuse, and no equity-release lender currently accepts it. Your buyer didn't change their mind — their money did.

Sources: House of Commons Library, "Spray foam insulation and mortgages" · HomeOwners Alliance, spray foam guide. Lender policies change — check current positions before relying on them.

Your three honest routes

We're the third one — and we'll tell you when one of the first two is the better answer, because for some people it genuinely is.

Remove it, certified

Full removal by a specialist, with photographs and paperwork, then sell normally. If the timbers underneath are sound, this restores mortgageability and gets you full market value.

Around £40/m²; whole-loft quotes commonly run £2,000–£17,000, and the trade is patchy — the industry that mis-sold the foam also sells its removal. Add weeks, and the risk the timbers need work once exposed.

Assess and document it

A specialist inspection confirming the installation and the condition of the roof, presented to the lender. It has worked: one seller had a refusal reversed within two weeks once the foam was "cleared and documented properly". If your buyer's lender will engage, try this before anything drastic.

Not all lenders will engage, whatever the paperwork says — and you only find out after the weeks have been spent.

Sell to us, foam and all

We buy without a mortgage, so there's no lender to refuse. Tell us about the foam in the form — the offer is made knowing it's there, which means it can't fall apart at the survey the way your last sale did. You pick the completion date; the figure is fixed once you accept.

The price is below market value — 65–82% depending on the date you choose, shown before you give us anything.

The certain route: no removal, no lender roulette, a date in writing and £500 a day on us if we miss it.

Why we can buy what a lender won't touch

A lender is protecting a 25-year loan against a roof it can't inspect — caution is its job. We're buying the whole house at a price that already assumes the survey finds what spray foam surveys usually find. That's the difference that matters to you: our offer is made after the bad news, not before it. There's no mortgage-in-principle to be withdrawn, no revised offer on survey day, and no chain of other people's lenders above us.

And because the foam is priced in from the start, disclosing it helps you rather than hurts you. Tell us in the form, tell us the year it went in and whether you have the installer's paperwork — every detail you give us up front is a thing that can't be used to move the price later. That's how our price promise works.

The questions spray-foam owners ask

The government scheme paid for it. How is this my problem?

It shouldn't be, and we won't pretend the situation is fair — a lot of foam went in under schemes that told owners it was the responsible choice. But fairness doesn't move a lender's policy, and waiting for the industry to settle its "no definitive answer" argument has already cost some owners years. Your choices are the three routes above, whoever's fault the foam is.

Will you reduce the offer when your survey sees the foam?

No — that's the point of telling us first. The offer is made knowing the foam is there. The only thing that changes a figure after you accept it is something material you knew about and didn't disclose, which is exactly why we ask you to disclose everything.

My buyer didn't pull out — should I still be worried?

If you're selling with a mortgage buyer and the foam hasn't been flagged yet, it very likely will be at survey — surveyors now look for it specifically. Better to decide your route now than at week nine with a chain above you. If your sale is proceeding fine, carry on; you don't need us.

Is removing it worth it?

Sometimes, genuinely. If the house is worth a lot, the loft is small, the foam is recent and open-cell, and you have time, certified removal can be the best-value route to full market price. Get three quotes, insist on photographic evidence of the cleared timbers, and check what documentation the buyer's lender will want. If the sums or the timeline don't work, that's where we come in.

Get a figure that already knows about the foam

There's no obligation and nothing to sign. We'll give you a figure in writing, with our reasoning, and you can take it to anyone you like before you decide.

Or call us: 0191 249 3969 · 8am–8pm, seven days