How much does spray foam removal cost in the UK?
Spray foam removal costs depend almost entirely on whether you have open-cell or closed-cell foam. Open-cell removal typically costs £3,000–£8,500. Closed-cell removal which usually requires re-roofing typically costs £12,500–£25,000. Every quote is fixed-price, inc. VAT, with replacement insulation included.
Spray foam removal cost quick answer
Open-cell loft removal: £3,000–£8,500 inc. VAT
Typical for spray foam applied to loft rafters. Hand-removal, no roof damage, replacement Knauf loft insulation included. Completion documentation provided.
Closed-cell loft removal: £12,500–£25,000 inc. VAT (typical range)
Closed-cell foam is denser and almost always damages the roof felt underneath. Every closed-cell removal includes any re-roofing required, replacement insulation, and completion documentation. Very large or complex properties can reach £75,000+ we've completed jobs at this scale, but they're the exception.
All prices include VAT. Free survey, fixed quote within 48 hours.
Spray foam and your mortgage
Many lenders and surveyors are cautious about properties with spray foam insulation, particularly closed-cell foam applied to the underside of the roof. Removal and, where needed, roof remediation can help, but each lender or surveyor decides case by case. Policies vary between lenders and change over time, so check the current position with your own lender or broker. On completion we provide documentation of the work carried out, which we can send to your solicitor or lender on request.
What drives the cost of spray foam removal?
Five variables determine your final price. The first foam type accounts for most of the range.
- Type of foam open-cell vs closed-cell. Closed-cell is 3–4x the cost of open-cell on equivalent properties because it usually requires re-roofing. This single factor matters more than anything else.
- Surface area. Measured per square metre of treated roof. The UK average loft is 50–80 m². Larger lofts cost more.
- Access. Scaffolding adds £400–£1,200 where needed always included in the quote upfront.
- Roof condition underneath. If the felt or timbers are damaged (almost always the case with closed-cell), those need replacing too.
- Disposal. Spray foam waste has specific disposal rules. Built into the quote, not extra.
We give a fixed price after a free survey. No estimates that creep up later.
Open-cell vs closed-cell what you have and what it costs
The single biggest factor in your removal cost is which type of foam you have. Open-cell removal averages around £4,000–£5,000. Closed-cell removal averages around £15,000–£20,000. The reason for the gap is simple: closed-cell foam is hard, dense, and almost always damages the roof felt and timbers it's sprayed onto. When we remove it, we usually have to re-roof re-felt, replace damaged timbers, re-tile. That work is bundled into the quote, not added later. Open-cell foam removes more cleanly and rarely needs roof reconstruction.
Open-cell spray foam removal costs (inc. VAT)
| Property type | Approx. loft area | Low | Typical | High |
|---|---|---|---|---|
| 3-bed semi-detached | ~50 m² | £3,150 | £3,650 | £4,150 |
| 4-bed detached | ~80 m² | £4,000 | £4,900 | £5,750 |
| Large or complex (100+ m²) | 100+ m² | £5,800 | £6,350 | £8,500 |
All open-cell prices include hand-removal, disposal, replacement Knauf loft roll insulation (fitted), and completion documentation. Re-roofing is not required for open-cell removal.
Closed-cell spray foam removal costs (inc. VAT, re-roofing included where required)
| Property type | Approx. loft area | Low | Typical | High |
|---|---|---|---|---|
| 3-bed semi-detached | ~50 m² | £12,500 | £15,000 | £20,000 |
| 4-bed detached | ~80 m² | £15,000 | £20,000 | £25,000 |
| Large or complex (100+ m²) | 100+ m² | £18,500 | £27,000 | £75,000+ |
Most closed-cell removals on standard properties sit between £12,500 and £25,000. Very large properties, listed buildings, or jobs needing significant roof reconstruction can reach £75,000+ we've completed jobs at this scale, but they're the exception. All prices include re-roofing where required, replacement Knauf loft roll insulation, and completion documentation.
Spray foam removal and mortgages
Spray foam can affect buyers, sellers and homeowners looking to remortgage. Lending decisions are made by each lender or surveyor case by case, and removal does not guarantee approval. Policies vary between lenders and change over time, so check the current position with your own lender or broker. On completion we provide documentation of the work carried out, which we can send to your solicitor or lender on request.
For more on how lenders approach spray foam, see our guide to which lenders accept spray foam removal.
Selling or remortgaging? Book my free survey
The spray foam removal process what happens and how long it takes
- Free survey (1 hour, within 48 hours of enquiry). We inspect the loft in person and use a camera system to check the roof externally. We identify the foam type, measure the treated area, and assess roof condition. You get a full picture before any money is committed.
- Fixed quote within 48 hours of survey. A single price, inc. VAT, covering everything removal, disposal, replacement insulation, re-roofing if needed, and completion documentation. No extras.
- Removal day(s) typically 1–3 days depending on scope. We use hand-removal throughout. We don't use dry ice blasting it introduces moisture into the loft space and doesn't work well on open-cell foam. Hand-removal leaves the structure in better condition and lets us spot hidden timber damage as we go.
- Completion documentation. Once the work is finished we provide a record of what was done, and can send it to your solicitor or lender on request.
Regional pricing does location affect the cost?
Pricing is reasonably consistent UK-wide because we operate nationally with established supply chains. London and the South East typically run 10–15% higher due to access constraints, parking restrictions, and disposal costs. Northern England and Welsh jobs run at headline rates.
We have offices in Bournemouth, Exeter and Weymouth, and active project teams across the Midlands, the South West, Greater Manchester, and Wales. Distance is rarely a barrier we quote jobs nationally every week.
What's included in every spray foam removal quote
- Pre-removal survey and comprehensive roof inspection
- All labour, equipment and scaffolding (where required)
- Waste disposal, compliant with UK environmental regulations
- Replacement insulation (Knauf loft roll, fitted to current building regulations standard) included on every job, not an add-on
- Re-roofing where required (re-felt, damaged timber replacement, re-tile) included on all closed-cell removals
- Completion documentation
- Qualifying re-roofing works include an insurance-backed guarantee, with full terms confirmed in writing
- All prices inc. VAT
Spray foam removal cost frequently asked questions
How much does spray foam removal cost for a 3-bed semi?
Open-cell removal on a 3-bed semi (approximately 50 m² loft area) costs between £3,150 and £4,150 inc. VAT, with £3,650 typical. Closed-cell removal on the same property runs between £12,500 and £20,000 inc. VAT, typically £15,000. Both prices include replacement Knauf loft insulation and completion documentation.
Is spray foam removal cheaper without the completion documentation?
No. Completion documentation is included on every job rather than sold as an add-on, because the work is carried out to the same standard either way. A clear record of the work can be useful if you later sell or remortgage, although lending decisions remain with each lender.
Is replacement insulation extra after the foam is removed?
No. Every Countrywide spray foam removal quote includes replacement loft insulation Knauf loft roll, fitted to current building regulations standard. Other operators sometimes quote removal-only and add the replacement cost later. We don't. The price you see is the price you pay.
Does my home insurance cover spray foam removal?
Usually not as a standard claim, unless the foam was applied negligently or caused documented damage. Some homeowners have had success claiming where the installer was uninsured or the foam caused structural issues. We recommend contacting your insurer before booking removal. We can provide documentation of the roof condition at survey stage to support a claim if needed.
Can I claim spray foam removal back from the original installer?
Potentially, if the installer is still trading and the foam was mis-sold or incorrectly applied. Many spray foam installers from the 2010s government grant scheme are no longer operating. If you received spray foam under a government scheme, check whether the installer's guarantee scheme still exists. We can provide a technical report to support a claim.
Why is closed-cell removal so much more expensive than open-cell?
Three reasons. First, closed-cell foam is denser and harder to physically remove it takes more time and labour. Second, closed-cell foam is almost always sprayed directly onto the roof felt and adheres to it, damaging it on removal which means re-roofing. Third, closed-cell weighs more, so disposal costs are higher. Open-cell jobs: £3,000–£8,500. Closed-cell jobs: £12,500–£25,000 for typical properties.
Do you re-roof every house? Will I need a new roof?
We only re-roof when removing closed-cell foam and only the sections where the foam has damaged the underlying felt or timbers. Open-cell removal rarely needs any roof work. If you have open-cell foam, your existing roof stays as it is. If you have closed-cell, we'll tell you at survey stage exactly what's needed and include it in the quote never a surprise extra mid-job.
Does spray foam removal damage my roof?
Open-cell removal doesn't damage a healthy roof. The foam peels away from the felt without tearing it. Closed-cell removal typically damages the felt but this is caused by the foam itself, not our process. The felt is already compromised; we expose and replace it. For open-cell jobs, expect no additional roof damage beyond what the foam may already have caused.
How long does spray foam removal take?
Most open-cell removals complete in 1–2 days. Closed-cell removals typically take 3–5 days. Large or complex properties can take longer. We give you a timeline at quote stage. Completion documentation follows once the work is finished.
Will I need to leave the house during removal?
Not usually for open-cell removal. The work is confined to the loft space, and dust is managed with sheeting and extraction. For closed-cell removals involving re-roofing, you may want to arrange alternative accommodation for the roofing days if the roof is fully stripped. We'll advise at survey stage based on your property.
What if you find more foam than expected during the job?
The fixed price is based on the survey. If additional foam is found beyond what was accessible at survey, we discuss it with you before doing any additional work never at the end of the job. This is why the thorough loft and comprehensive inspection at survey stage matters: it reduces surprises significantly.
Are there any government grants for spray foam removal?
There are currently no direct government grants for spray foam removal in the UK. If your spray foam was installed under a government scheme such as CERT or CESP, contact the Energy Saving Trust or your local council to check whether any remediation support is available. We can provide documentation to support any application.
Why choose Countrywide for spray foam removal?
National coverage, regional teams. Offices in Bournemouth, Exeter and Weymouth; active teams across England and Wales. Spray foam removal is a primary service not an occasional sideline.
Documented from survey to completion. Every job includes replacement insulation and completion documentation, so you have a clear record of the work for your solicitor, lender or surveyor.
Accredited installers. Members of CORC (the Confederation of Roofing Contractors). Full liability insurance on every job.
Related: Our spray foam removal service | Open-cell vs closed-cell which do you have? | Can I remove spray foam myself?
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Free survey. Fixed price. Replacement insulation and completion documentation included on every job.
