Spray Foam Removal vs Roof Replacement
Some roofers will tell you a spray-foamed roof needs replacing entirely. In our experience across thousands of UK properties, fewer than 5% genuinely do. Here's how to know.
Cost comparison
| Option | Typical cost | Outcome |
|---|---|---|
| Spray foam removal only | £1,500 – £12,000 | Mortgageable, timber inspectable |
| Removal + timber treatment | £2,500 – £14,000 | Mortgageable, treated timbers |
| Full roof replacement | £15,000 – £40,000+ | New roof — only needed in extreme decay |
When replacement IS necessary
- Multiple rafters with structural failure
- Roof deck (sarking) is rotten through
- Tiles or slates are also at end of life
Always get a second opinion
If a contractor tells you the entire roof must come off, get an independent removal specialist to inspect first. The vast majority of UK spray foam roofs are recoverable with removal alone.
Frequently Asked Questions
Generally no — spray foam is considered installer-owned damage, not a covered peril.
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