The numbers
| Item | Indicative cost | Notes |
|---|---|---|
| Independent assessment report | £250 – £600 | Before deciding on removal |
| Removal, open-cell foam | £25 – £40 per m² of roof | Softer, quicker to remove |
| Removal, closed-cell foam | £35 – £50 per m² of roof | Harder, more timber cleaning |
| Typical semi-detached, removal only | £2,000 – £6,000 | 60–90 m² of roof |
| Timber treatment and inspection | £200 – £800 | Where moisture found |
| Felt and batten repair | £300 – £1,500+ | Often needed with closed-cell |
| Replacement loft floor insulation | £450 – £1,600 | Standard top-up |
| Replacement rafter insulation | £2,000 – £6,500 | If a warm roof is wanted |
How these numbers were reachedCompiled from published UK cost guides and contractor input, compiled and reviewed 3 September 2026. Removal pricing varies widely by contractor; get two quotes and check both include disposal and photographs. Methodology.
Get two removal quotes
Get removal quotesFrom contractors who do not sell foam. Documented with photographs.
What should be included
- Removal to clean timber, with photographs before and after
- Inspection of rafters and felt, and a written note of condition
- Disposal of the foam
- A report you can give to a buyer, surveyor or lender
Questions homeowners ask
Is spray foam removal worth it?
If it is blocking a sale or remortgage, the removal cost is usually far less than the price impact. If you are staying put and the roof is dry, it is a judgement call — but the issue will return when you sell.
Sources and when they were last checked
- Energy Saving Trust — Roof and loft insulation — checked 2 September 2026
- Checkatrade — Loft insulation cost guide — checked 2 September 2026