Often, yes — but it depends on your lender, your foam, and your paperwork. Some remortgages go through untouched; others stall the moment a valuer sees foam in the loft. Here’s how to protect yours.
- ✓Independent advice first — remortgaging often doesn’t require removal
- ✓Help understanding what evidence your lender is likely to ask for
- ✓If removal is the right route: vetted firms, and you pay nothing until sign-off
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Spray foam in the UK — the key numbers
Who will lend where spray foam was retrofitted?
Sources: House of Commons Library briefing CBP-10658 · PCA & HomeOwners Alliance joint letter (May 2025) · BBC research (Nov 2024) — full detail on our spray foam statistics page.
The short answer
Spray foam in the roof does not automatically stop a remortgage. Lender policies differ widely: some will lend where spray foam is present and properly documented, others decline or ask for further evidence, and a smaller number decline most cases outright. What usually decides the outcome is which lender you approach and what paperwork you can show — not the foam alone. Our regularly updated lender-by-lender guide shows the current picture.
Why remortgages run into trouble
Three things trip up most spray foam remortgages:
1. The valuation. Many remortgages include at least a desktop or drive-by valuation — and where a physical inspection happens, foam in the loft is commonly flagged for further investigation, which can pause the application.
2. Missing paperwork. Lenders that do accept spray foam typically want evidence: what product was installed, by whom, to what certification, and in what condition the roof is now. Installations sold on the doorstep often come with little or none of this.
3. Lender criteria. Research by the HomeOwners Alliance with the BBC found only around a quarter of lenders would lend on homes with retrofitted spray foam — so the same property can be declined by one lender and accepted by another. Requirements also change over time, which is why we keep the lender table dated and change-logged.
Staying with your current lender vs switching
A product transfer (a new deal with your existing lender) may not involve a fresh physical valuation, and some homeowners remortgage this way without the foam ever being re-examined. It isn’t guaranteed — policies vary and lenders can revalue — but it is usually the first option worth exploring, and a whole-of-market broker can check it quickly. Switching lender means a new application and, often, a new valuation — which is where the lender table and your evidence matter most.
What improves your position
Whatever route you take, the same things help: the installation certificate and product details if you have them, any independent inspection report on the foam and roof timbers, and a clear record of what type of foam is installed (open-cell and closed-cell are treated differently by some lenders and surveyors). If you have none of this, an independent assessment is usually the sensible first step — in many of the cases we look at, removal isn’t actually required.
If the answer keeps coming back “no”
Where a lender declines and evidence doesn’t change their mind, homeowners generally weigh three routes: try a lender whose criteria fit (see the table), consider professional removal with independent sign-off and lender-ready documentation (costs are set out in our 2026 cost guide), or — if a sale is the real goal — read our guide to selling a house with spray foam. Which route makes sense depends on your property, your timescale and the numbers; that’s exactly what our advisers talk through every day, free of charge.
Remortgage FAQs
Does spray foam always cause a remortgage problem?
No. Outcomes vary by lender, foam type, documentation and how the application is handled. Plenty of remortgages complete with foam in place — and some stall. The lender’s criteria and your evidence are the deciding factors.
Will removing the foam guarantee my remortgage is approved?
No — no one can guarantee a lending decision. What removal with independent sign-off does is deal with the specific objection, with documentation lenders can rely on. Approval still depends on the lender’s wider criteria.
Is a product transfer with my current lender easier?
It can be, because it may not trigger a fresh physical valuation — but it isn’t guaranteed and rates should still be compared. A whole-of-market broker can check both routes.
What about equity release?
Equity release with retrofitted spray foam is currently very restricted — see the notes in our lender guide for the current position and sources.
By Adam Gough, Founder & Lead Adviser, National Spray Foam Advisory. Independent guidance — we don’t carry out removals, and we are not regulated to give mortgage advice: always confirm the current position with your lender or a qualified broker.
Remortgage stuck — or just not sure where you stand?
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Keep reading: Which Lenders Accept Spray Foam? · Mortgage Problems Guide · Selling With Spray Foam · Real Homeowner Cases