Key Takeaways
- Open-cell foam removal: approximately £25–40 per m²
- Closed-cell foam removal: approximately £40–65 per m²
- Typical 100m² loft overall cost: approximately £2,800–£8,000
- Difficult access adds approximately £5–15 per m²
- The headline price often excludes timber repairs, re-insulation, and certification — budget for these separately
- Only a site survey gives a fixed price — treat online estimates as a starting point
- Never pay a large upfront deposit; reputable firms do not require one
Quick Answer: Typical Cost Ranges
| Item | Typical range |
|---|---|
| Open-cell foam removal (per m²) | £25–40 |
| Closed-cell foam removal (per m²) | £40–65 |
| Standard 100m² loft (overall) | £2,800–£8,000 |
| Difficult access surcharge | £5–15 per m² |
| Waste disposal | £75–200 |
| Timber repairs (if required) | £200–1,000+ |
| Re-insulation (breathable material) | £300–1,500+ |
| Independent RICS removal certificate | From ~£349 |
These ranges are sourced from industry data current as of June 2026. Individual quotes will vary. A site survey is the only way to get a firm price for your specific property.
Cost by Foam Type
The single biggest factor in removal cost is the type of foam present.
Open-cell foam is the softer, spongy variety — lighter in density and more forgiving to remove. It typically peels and crumbles away from timber more readily than closed-cell, requiring less equipment time and less physical effort. Removal costs sit at approximately £25–40 per m².
Closed-cell foam is dense, rigid, and bonds very firmly to whatever it has been applied to. Removing it from roof rafters requires significantly more time, more robust equipment, and more careful work to avoid damaging the timber beneath. Closed-cell removal costs approximately £40–65 per m² — roughly 50–60% more than open-cell for the same area.
If you are unsure which type of foam you have, our guide to identifying your foam type explains how to tell the difference, and what to look for.
What Affects the Price
Beyond foam type, several other factors drive quotes up or down:
Loft access and configuration. A simple, open loft with a well-positioned hatch and adequate standing height is the cheapest scenario. Low-pitch roofs (where workers cannot stand upright), multiple hatch points, dormer windows, water tanks and other obstacles, and tightly compartmentalised loft spaces all increase labour time and cost. Difficult access typically adds £5–15 per m² to the base rate.
Total area. Quotes are typically calculated per square metre of foam area treated. Larger lofts cost more in absolute terms, but may benefit from some economies of scale in mobilisation costs.
Foam thickness and coverage. Foam applied very thickly or sprayed right up to the eaves (where access for removal is hardest) increases cost and time.
Condition of the timbers. If the preliminary inspection reveals timber already affected by moisture or rot, repairs will be needed before and after removal. Timber repair costs range from approximately £200 to £1,000+, depending on the extent of the damage.
Re-insulation. Once the foam is removed, most lofts will need new insulation. Re-insulating with breathable material (mineral wool, for example) typically costs approximately £300–£1,500+, depending on area and material.
Extra Costs: The Full Budget Picture
The headline removal cost — the £2,800–£8,000 range for a standard loft — typically covers the foam removal itself and basic clean-up. Several additional costs may apply:
Waste disposal — removed foam is classified as waste and must be disposed of responsibly. This is usually included by reputable firms but worth confirming; where separate, expect approximately £75–£200.
Timber repairs — if your timbers are found to have moisture damage or early rot, repairs are required before re-insulation. Get this assessed as part of the inspection stage.
Re-insulation — essential after removal to restore your loft’s thermal performance and your property’s EPC rating. Choose a breathable, lender-friendly material such as mineral wool.
Independent RICS removal certificate — required by most mortgage lenders to confirm the foam has been fully removed and the roof is sound. Costs from approximately £349. This must be issued by an independent RICS surveyor, not by the removal firm.
An honest, reputable removal firm will itemise all of these costs in their quote so you can see exactly what is — and is not — included.
How to Get a Fixed Price
The only way to get a firm, accurate price for your removal is a site survey by a qualified removal specialist. During a site survey, they will:
- Identify the foam type (open-cell or closed-cell)
- Assess the coverage area
- Evaluate loft access and any complicating factors
- Inspect the visible timber condition
- Confirm what, if any, repairs or re-insulation are needed
- Produce an itemised written quote
Get a minimum of three itemised quotes from different firms to enable a fair comparison. Ensure each quote covers the same scope of work — removal, disposal, any repairs, re-insulation, and certification — so you are comparing like with like.
The Bottom Line
Budget a realistic range — not a single figure — and understand what is and is not included in any quote you receive. The full cost of resolving a spray-foam situation is typically the removal itself, plus disposal, any timber repairs, breathable re-insulation, and an independent RICS certificate.
Get three itemised quotes, never pay a large upfront deposit, and use a site survey, not an online calculator, as the basis for your final budget.
Request a no-obligation removal quote or book an independent inspection to understand what you’re dealing with first.
This is general information, not financial advice — please consult a qualified mortgage broker about your circumstances.
Related reading: Open-cell vs closed-cell removal: why the price differs · The hidden costs of spray foam removal · How to budget for spray foam removal