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title: "Loft Insulation Replacement Cost After Spray Foam Removal | UK Guide"
description: "Realistic 2026 UK costs for replacing your loft insulation after spray foam removal — by property type, insulation type and depth."
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# Loft Insulation Replacement Cost After Spray Foam Removal

Replacement insulation is one of the most predictable and affordable parts of the post-removal process. This guide breaks down realistic 2026 UK costs by property type and material so you can budget the full project end-to-end.

## The standard specification

270mm of mineral wool laid at ceiling joist level is the default UK specification. This meets current Building Regulations Part L for retrofit insulation and is accepted by every lender as standard.

## Cost by property type — mineral wool

Mid-terrace homes typically cost £400–£600 for full mineral wool replacement. Semi-detached £500–£900. Detached £700–£1,200. Bungalows with larger footprints £800–£1,400. Prices include materials, installation, and basic eaves vent restoration.

## Cost by material — relative pricing

Mineral wool is the baseline (1×). Sheep's wool runs 2.5–3× mineral wool. Wood fibre boards run 3–5×. PIR boards between rafters with battening run 4–6×. Hemp and recycled cotton 2.5–3×.

## Boarding the loft floor

If you want to retain loft storage, raised loft legs above the new insulation cost £300–£800 for materials and £200–£600 for installation depending on area. This avoids compressing the insulation and breaking the U-value.

## Eaves vent restoration

Many post-removal projects include reinstating soffit or fascia vents. Allow £150–£400 typically, though if external scaffolding is required this can rise.

## Combined removal-plus-insulation packages

Many UK specialists offer the removal and replacement insulation as a single package, which can save 5–10% versus commissioning the insulation separately afterwards. The single contractor also makes warranty claims simpler.

## Building Regulations sign-off

Loft insulation up to 300mm at joist level is typically a notifiable but straightforward Building Control matter. Reputable installers handle the paperwork as part of the quote.

## Grant funding

ECO4 and the Great British Insulation Scheme can fund replacement insulation for qualifying households. Eligibility depends on income, benefits and EPC rating. A reputable installer will check whether your project qualifies before invoicing.

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## Related Guides

[Why Are UK Mortgage Lenders Refusing Spray Foam Insulation? → ](/blog/why-mortgage-lenders-refusing-spray-foam)[Can You Sell a House With Spray Foam Insulation in the UK? → ](/blog/can-you-sell-house-with-spray-foam)[Does Spray Foam Insulation Cause Timber Rot in UK Roofs? → ](/blog/does-spray-foam-cause-timber-rot)[How Long Does Spray Foam Removal Take in a UK Home? → ](/blog/how-long-does-spray-foam-removal-take)

SprayFoam

Removal UK

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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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