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title: "Timber Treatment After Spray Foam Removal | UK Specialist Guide"
description: "After spray foam removal, do your roof timbers need treatment? UK guide to inspection, borate treatment and rafter repair costs."
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[

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# Timber Treatment After Spray Foam Removal

Once spray foam is removed, the exposed roof timbers are inspected for moisture damage, fungal decay and woodworm. In most UK homes, the timber is sound. Where treatment is needed, here's what's involved.

## What inspectors look for

-   Moisture content above 20% (decay risk)
-   Soft or spongy areas (rot present)
-   White or brown fungal growth
-   Woodworm flight holes
-   Splits, sagging or fixings pulling out

## Treatment options

-   **Borate-based timber treatment** — sprayed onto rafters; £400–£900 typical
-   **Sister rafters** — fixing a new timber alongside a damaged one; £80–£150 per rafter
-   **Resin repair** — for localised end-grain decay
-   **Full rafter replacement** — rare; only where structural failure has occurred

## Frequently Asked Questions

Is timber treatment always needed? 

No — in around 70% of UK homes, the timber is fine and no treatment is required.

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## Related Guides

[Closed-cell removal → ](/closed-cell-spray-foam-removal)[Removal vs replacement → ](/spray-foam-removal-vs-roof-replacement)

SprayFoam

Removal UK

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#### Core Pages

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#### Advice

-   [Mortgage Problems](/spray-foam-mortgage-problems)
-   [Selling Your Home](/spray-foam-removal-before-selling-house)
-   [Timber Treatment](/spray-foam-removal-timber-treatment)
-   [Removal vs Replacement](/spray-foam-removal-vs-roof-replacement)
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All guidance on this site is written in-house by our UK spray foam removal team based on real survey, removal and certification work carried out across England, Scotland, Wales and Northern Ireland. Pricing is reviewed quarterly against live 2026 quotes from our specialist network.

© 2026 removingsprayfoaminsulation.co.uk — UK Spray Foam Removal Specialists Original content · Updated UK Pricing 2026 

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