You’ve paid to have spray foam removed. The company hands you a “completion certificate”, tells you it’s everything you’ll need for your mortgage or your sale, and drives away. Months later, a buyer’s surveyor or a lender’s valuer asks one question: who independently verified this? — and the certificate doesn’t answer it.
We hear this story on our advice line every week. This guide explains what a removal company’s completion certificate actually is, why it is so often not enough on its own, how homeowners get caught out later, and the one document that protects you.
What a “completion certificate” really is
When a spray foam removal company finishes a job, most will issue a certificate confirming the foam has been removed. It usually looks official — a logo, a reference number, sometimes a “guarantee” or the word “approved”.
Here is the part many homeowners only learn later: that certificate is issued by the company that did the work, about its own work. Spray foam removal is not a regulated activity in the UK. There is no government scheme, no statutory register and no independent body that licenses these certificates or checks the work behind them. However professional the paperwork looks, it is self-certification — the company marking its own homework.
That doesn’t make the certificate worthless, and it doesn’t mean the company did a bad job. Plenty of removal firms do excellent work. It means the certificate proves far less than the sales pitch suggests — and the gap between the two is exactly where homeowners get caught.
“This is all you’ll need” — the sales line that catches people out
The problem usually starts at the quote stage. To close the sale, some companies tell homeowners their certificate is all a lender, surveyor or buyer will ever ask for. It sounds reassuring, you’re paying thousands of pounds, and there’s rarely any reason to doubt it on the day. So you pay, file the certificate away, and believe the problem is solved.
Then, months or years later, one of three things happens:
- You sell the house. The buyer’s surveyor learns spray foam was present — from the property information form, mortgage records or signs left in the loft — and asks for independent evidence of what was removed and what condition the roof timbers were left in. A certificate from the company that was paid for the job does not satisfy that question, and the sale stalls at exactly the moment you can least afford it.
- You remortgage or apply for equity release. The lender’s valuer raises the same point. As things stand, only around 25% of mortgage lenders, and no equity release providers, will lend where spray foam was installed as a retrofit — and after a removal they want independent confirmation that the foam has genuinely gone and the roof is sound, not the remover’s own paperwork.
- A problem surfaces under the roof. If foam was left in awkward corners, or damp and timber decay weren’t inspected at the time, the certificate gives you very little to fall back on — especially if the company has since renamed, closed or disappeared, which in this industry is not rare.
In every version of this story the homeowner did nothing wrong. They simply relied on the person selling the work to tell them what proof they would need afterwards.
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.
Completion certificate vs RICS surveyor’s report
| Company completion certificate | RICS surveyor’s report | |
|---|---|---|
| Issued by | The company you paid for the removal | An independent RICS-qualified surveyor with no stake in the job |
| Backed by | The company’s own word (no regulator or independent scheme) | Professional qualifications, RICS standards and professional indemnity insurance |
| Confirms timber condition? | Rarely — usually just states the foam was removed | Yes — timbers inspected, condition recorded, damp and decay noted |
| Accepted by surveyors, buyers and lenders? | Often questioned or rejected as self-certification | The form of evidence they recognise |
| Useful if the company later disappears? | Little practical value | Stands on its own — independent of the removal firm |
What a proper RICS report on completion covers
An independent post-removal inspection by a RICS-qualified surveyor produces a report confirming, from someone with nothing to gain from the job, that:
- the foam has been fully removed — including the awkward areas around eaves, party walls, pipework and under battens where residue is most often left;
- the roof timbers have been inspected, with their condition recorded and any damp, rot or damage documented;
- the loft has been left in a sound, saleable state, with ventilation restored.
That independence is the whole point. A surveyor’s professional opinion answers the exact question a future buyer’s surveyor or lender’s valuer will ask — and it keeps its value even if the removal company no longer exists.
How to protect yourself: the before-you-sign checklist
The strongest protection costs nothing: agree the independent sign-off before the work starts, not after. Before accepting any quote:
- Ask, in writing: “Will you support an independent RICS surveyor’s inspection on completion?”
- Have the answer written into the quote or contract — not left as a verbal promise;
- Where possible, tie the final payment to the independent inspection being satisfactory;
- Choose your own surveyor — not one “recommended” by the removal company;
- Keep the surveyor’s report with your property documents alongside the company’s certificate.
A reputable company will not object — many actively welcome it, because independent sign-off protects them too. In our experience, the reaction to this question is one of the most reliable character tests in the industry:
- “Of course — plenty of our customers do that.” Good sign. This is how a professional removal should work: inspection first, removal done properly, independent sign-off at the end.
- “You don’t need that — our certificate covers everything.” Treat this as a red flag, and ask yourself why an independent check worries them.
Already had removal done and only hold the certificate?
It is not too late. An independent RICS surveyor can inspect your loft now and produce a retrospective report on the state of the roof and the completeness of the removal. If you are selling a house where spray foam was present, arranging that report before you list the property means the question is answered before a buyer’s surveyor ever asks it — which is far better than scrambling for evidence mid-sale.
Quick answers
Is a removal company’s completion certificate worthless? No — it is a record that work took place and may support any guarantee the company offers. But it is not independent verification, and on its own it is rarely enough for a sale, remortgage or equity release application.
Who should sign off spray foam removal? An independent RICS-qualified surveyor, inspecting after the work is complete. Their report — not the remover’s certificate — is the evidence surveyors and lenders recognise.
The company says their certificate is “industry approved” — is it? Ask which independent body approves it and verify with that body directly. Spray foam removal is not a regulated activity in the UK, so treat any “approved” or “certified” claim with care until you have checked it yourself.
National Spray Foam Advisory is a free, independent advisory service. We are not regulated financial or mortgage advisers, and nothing here is financial advice — for lending decisions, always speak to your lender or a qualified adviser.
Worried about spray foam problems in your home? Call us free on 0800 494 7163 or leave a message about your situation and we will give you the advice you need to resolve it — and a full understanding of the guidance around spray foam and how it applies to your home. We are a free, independent advisory service and we carry out no removals ourselves.
Had the foam removed already? See which mortgage lenders accept homes after spray foam removal.