Ask three spray foam removal firms to quote the same loft and you'll often get three numbers more than a thousand pounds apart. The gap is rarely greed. It's scope: one quote includes the timber work, the waste paperwork and the photographs, one includes some of it, and one is a price to make the foam disappear. Here's how to make them comparable, and the answers that should end the conversation.
Key takeaways
- Quotes differ because scope differs. Until every quote names the same line items, you're comparing a number with a number, not a job with a job.
- Twelve questions sort the quotes. The answers you want are specific: a named method, a timber inspection, a waste transfer note, dated photographs, a written guarantee.
- Walk away from a fixed price given without a survey, a large deposit due today, or any promise of "guaranteed lender approval".
- The cheapest quote is only a saving if the paperwork gets your sale or remortgage through. Paying twice is the expensive outcome.
Why three quotes for the same loft differ so much
Six things move a spray foam removal quote, and most firms don't show you which ones they've priced in.
- Foam type. Open-cell foam cuts away. Closed-cell foam bonded to timber or slate has to be pared back by hand and takes two or three times as long.
- Coverage. A rafter-only job is different from foam over every surface including the gable walls and the loft floor.
- Timber work. Does the price include inspecting the exposed rafters and battens, treating them, and replacing anything rotten? Or does that arrive as an extra on the day?
- Waste. Spray foam is controlled waste. Bagging it, carrying it under a waste carrier's licence and giving you the transfer note costs money. Skipping it is cheaper and illegal.
- Paperwork. Dated photographs before, during and after, a completion certificate and a written description of what was done. Some firms include this. Some charge. Some don't produce it at all.
- Access and making good. Tight hatches, no boarding, re-laying insulation afterwards, cleaning up dust that gets everywhere.
Industry benchmarks put a typical three-bedroom roof at around £3,200 (Checkatrade, 2024). The spread around that figure is mostly the list above.
The 12 questions to ask every firm
- Will you survey the roof before you price it? Good answer: yes, free, within days. Bad answer: a fixed price now, over the phone.
- What type of foam is it, and how will you remove it? You want the method named: hand-cut, mechanical, or a mix, and why.
- Is a timber inspection included, and what happens if you find rot? Look for an inspection on every job and a clear rate for repairs, agreed before they start.
- What happens to the foam? The only acceptable answer involves a licensed waste carrier and a waste transfer note in your name.
- What photographs do I get? Before, during and after, dated, of the whole roof space, not three nice shots of the finished job.
- What's on the completion certificate, and who signs it? A description of the work, the dates, the firm's details and the person responsible.
- Can my lender require an independent surveyor, and will you work with one? The honest answer is "yes, some do" and "of course". A firm that insists its own certificate is always enough is overpromising.
- What's your guarantee, in writing? You want to know what it covers and what triggers it. "No-fix-no-fee" should be a document, not a slogan.
- What deposit do you need? Zero, or a small one on booking, is normal for established firms. A large deposit due today is a flag.
- Are you insured, and can I see it? Public liability at minimum, and cover for working at height. Ask for the certificate, not a logo.
- Will you re-insulate, and with what? Some include replacement insulation, some don't. Get it on the quote either way.
- Who will actually be in my loft? Directly employed crew, regular subcontractors, or whoever's available. There are good firms in every category, but you should know which you're buying.
The line items that must be on every quote
Ask each firm to put these on paper. If one won't, that's your answer.
- Removal of the foam, with the method and the areas covered.
- Timber inspection and treatment, with repair rates.
- Licensed waste removal and the transfer note.
- Photographic record, before, during and after.
- Completion certificate and any supporting documents.
- Replacement insulation, if included.
- Clean-up and making good.
- The guarantee, with its terms attached.
- Deposit, payment terms and any extras that could appear.
Making the quotes like-for-like
Draw a grid with the nine line items down the side and a column per firm. Tick what each quote includes, and write the price for anything it charges separately. Within five minutes you'll usually find the cheapest quote is missing two or three lines and the dearest has priced in a full re-roof you didn't ask for. The real comparison is the total for the same scope.
Price promises need the same treatment. "We'll beat any like-for-like quote" is only testable once the quotes are like-for-like, so send the firm your grid and ask it to match the scope, not just the number.
Answers that mean walk away
- A fixed price with nobody having seen the roof.
- "Our certificate is guaranteed lender approved." The government's October 2026 guidance says removal "will not always guarantee that they will still lend". No firm can promise what a lender will do.
- A deposit of a third or more, due today, to "hold the date".
- No answer on waste, or "we take it away" with no licence number.
- The firm rang you first. The same guidance says cold calls about spray foam can be reported to Trading Standards.
- Pressure built on your sale deadline. Good firms work to deadlines without weaponising them.
Deposits, guarantees and price promises, decoded
No-fix-no-fee should mean that if your lender or surveyor isn't satisfied with the removal, the firm puts it right at its own cost. Ask what "satisfied" means in the document and who decides.
Insurance-backed guarantee means a third-party insurer stands behind the promise if the firm disappears. It's more common on roofing work than on removal alone.
Price match and beat-any-quote promises are only worth anything against a like-for-like quote. Keep your grid.
Zero deposit shifts the risk to the firm, which is where it belongs. If a firm needs your deposit to buy materials for a removal, ask why.
Use the comparison, then make the call
We've already done part of this for the firms homeowners are most often pointed to. Our comparison of eight UK spray foam removal companies lists what each states publicly about coverage, paperwork and guarantees, including the contractor who carries out Go Green Quote removals. Take the twelve questions to whichever three you shortlist. If you'd like one of those three to be ours, the form below books a free survey with Remove Spray Foam Ltd at the same price as going direct, with no deposit.
