Is Spray Foam Insulation Banned in the UK?
The legal position, and what lenders and insurers actually do (updated October 2026)
By Jake Harber, spray foam removal adviser
The Answer
No, spray foam insulation is not banned in the UK.
However, some mortgage lenders and insurers decline properties with it, which can make a spray foam home harder to sell, remortgage or insure even though installation isn't illegal.
Legal Status vs. Practical Reality
Legal Status
- ✓ Installation is legal
- ✓ No government ban exists
- ✓ Can still be sold and applied
- ✓ Building regulations don't prohibit it
Practical Reality
- ✗ Some lenders decline it
- ✗ Some insurers refuse cover or charge more
- ✗ Fewer buyers can proceed, which can lower the price
- ✗ Surveyors often flag it at valuation
Why It Can Feel Like a Ban
No law prohibits spray foam, but the way some lenders and insurers treat it can make it feel like one:
Mortgage Lender Policies
Lender policies vary. In October 2026 the government named eight major lenders, including Nationwide, Lloyds, Barclays and HSBC, as open to lending on spray foam homes, subject to their own requirements. Others still decline. For detail on individual lenders, see our sister site's lender tracker.
Insurance Refusals
Some home insurers decline cover or charge higher premiums for properties with spray foam.
Lower Sale Prices
When a buyer's lender declines, the sale can stall or fall through, and sellers may be left with fewer, lower offers, even though the foam itself is legal.
Why Isn't There an Official Ban?
1. Not All Foam Causes Problems
Some professionally installed foam (with proper ventilation maintained) doesn't cause structural issues. A blanket ban would penalize proper installations.
2. Lenders and Insurers Set Their Own Policies
Whether a lender or insurer accepts a spray foam home is a matter for its own policy, and those policies differ from one firm to the next.
3. Existing Installations
Around 250,000 UK homes (an estimate) already have spray foam. A ban on new installations would not help existing homeowners.
4. It Is an Effective Insulator
Spray foam insulates well. The problems come from how and where it was applied, not from the material being unlawful.
Will Spray Foam Be Officially Banned?
No ban has been announced. The government's most recent statement is a policy paper published on 22 October 2026, Spray foam insulation: Remediation, removal and lending. It says:
- • Many mortgage providers are open to lending on properties with spray foam, subject to their own requirements, and it names eight: Nationwide, Lloyds, Santander, Barclays, NatWest, Coventry Building Society, The Co-operative Bank and HSBC. "Lenders can be added to the list at any time."
- • "Removing the foam will not always guarantee that they will still lend, and improper removal could lead to further issues."
- • "Before making any decision about your spray foam, you should take advice from a specialist surveyor." It refers to the Property Care Association's Spray Foam Insulation Inspection Protocol (March 2023).
- • If the installation was faulty: TrustMark dispute resolution where the work was done less than six years ago and the installer is still trading; otherwise the insurance-backed guarantee (typically up to 10 years), then the Dispute Resolution Ombudsman.
The paper says nothing about grants or funding for removal.
Can Spray Foam Still Be Installed?
Legally yes, but think hard before you do.
Companies still offer spray foam installation because it's not illegal. However:
- • It can lower the price your home will sell for
- • Some lenders will decline your property
- • Insurance can be more expensive or harder to find
- • You may need to remove it to sell (what removal costs)
- • Installers do not always explain these consequences upfront
Any installer who doesn't warn you about mortgage/insurance issues is being dishonest.
What Should Homeowners Do?
If Considering Installation:
DON'T DO IT
Use alternative insulation instead:
- • Mineral wool (rockwool/glass wool)
- • Rigid insulation boards (PIR/PUR)
- • Natural insulation (sheep's wool, hemp)
- • Blown-in cellulose
All provide good insulation without the mortgage and insurance problems spray foam can cause.
If You Already Have It:
GET ADVICE, THEN DECIDE
Start with a specialist survey. If removal is the right route, professional removal:
- • Gives most lenders that decline spray foam homes the documentation they ask for
- • Makes the roof timbers inspectable again
- • Can make insurance easier to arrange
- • Widens the pool of buyers who can proceed
Removal does not guarantee a lender will lend. Costs depend mainly on roof area and foam type; see what removal costs.
The Bottom Line
Spray foam isn't banned by law, but some lenders and insurers decline properties with it, and that can make a spray foam home harder to sell, remortgage or insure.
Lender policies vary, and the government has named eight major lenders as open to lending on spray foam homes, subject to their own requirements. Others still decline.
If you are thinking of installing it, choose another insulation. If you already have it, take advice from a specialist surveyor before you decide what to do.
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