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Renfrew · Renfrewshire and Inverclyde

Cavity wall insulation in Renfrew

Looking for cavity wall insulation in Renfrew? We survey first, name the installer, their scheme registrations and the guarantee on the quote, and only then book the work. Cavity wall insulation fills the gap between the two leaves of a brick or block wall with a certified insulating material, blown in through small holes drilled from outside.

Free survey in Renfrew

Covering Renfrew and the PA4 district. Tell us about the property and we will arrange a free survey and a fixed price.

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Cavity wall insulation for Renfrew properties

Renfrew is among the towns we cover in Renfrewshire and Inverclyde, alongside Paisley, Newton Mearns and Greenock. It is roughly 3 miles north-east of Paisley.

A suitable wall in Renfrew is usually filled in a single day from outside, with drill holes made good to match the pointing. Where a Renfrew property has an extension or a conservatory, we check how the old and new walls meet, because that junction is often missed.

Local weather affects which walls can be filled. Parts of Renfrewshire and Inverclyde face some of the heaviest wind-driven rain in the UK, especially exposed coastal and upland sites. Here the survey is stricter: some walls suit only certain certified systems, and some should not be filled at all.

On compliance, in Renfrew no building warrant is needed for insulation within a wall, but the work must meet the building standards.

Funding in Scotland

In Scotland, Home Energy Scotland is the route to the Home Energy Scotland Grant and Loan and Warmer Homes Scotland.

Sources: Home Energy Scotland; mygov.scot: grants and loans for energy saving improvements.

Which material goes in?

Usually blown mineral wool or bonded polystyrene beads, both third-party certified for cavity fill. The survey picks the system that suits your cavity width, wall condition and exposure zone, not whichever is cheapest on the day. Old-style urea-formaldehyde foam is not used.

What is included in Renfrew

  • Suitability survey with photos and a written result
  • Cavity barriers at party walls
  • Guarantee and installer named on your quote
  • Borescope check where the cavity is in doubt

Guide prices for Renfrew

Cavity wall insulation guide prices
Cavity wall insulation guide pricesGuide price
Detached house£2,295–£3,795
Semi-detached house£1,495–£2,495
End-terrace house£1,295–£2,195
Detached bungalow£1,295–£2,195
Semi-detached bungalow£895–£1,595
Mid-terrace house£795–£1,395

No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.

How it works in Renfrew:

  1. Get in touch

    Online, by phone or WhatsApp, whichever suits you.

  2. Survey visit

    The surveyor checks each wall and looks into the cavity where needed.

  3. Your result in writing

    What we found, what it means, and a fixed price if work is needed.

  4. Booked work

    Carried out by the installer named on your quote, with their scheme registrations.

Last reviewed 19 October 2026.

Cavity wall insulation in Renfrew: questions

Which building regulations route applies in Renfrew?

Renfrew is in Scotland, so no building warrant is needed for insulation within a wall, but the work must meet the building standards. We confirm the route in writing on your quote.

Is the survey free in Renfrew?

Yes when it is for an install quote. Standalone reports for Renfrew buyers, sellers or landlords who do not need an install quote are priced before you book.

Is there VAT on cavity wall insulation in Renfrew?

Installing insulation in a home is currently zero-rated for VAT until 31 March 2027, then 5%. Commercial buildings are standard-rated.

Is my Renfrew home too exposed for cavity insulation?

Parts of Renfrewshire and Inverclyde get some of the heaviest wind-driven rain in the UK, so the survey is stricter and some walls are better left unfilled. The survey records the exposure of each wall before recommending a material, or recommending against filling.

Nearby towns

Book a free survey in Renfrew

Free survey with an install quote. Written result. Fixed price before any work.