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Paisley · Renfrewshire and Inverclyde

Cavity insulation for new builds and extensions in Paisley

Cavity insulation for new builds and extensions in Paisley starts with a free survey of the property, then a written result and a fixed price before any work is booked. For new walls the cavity is insulated as it is built, using full-fill mineral wool batts or partial-fill boards fixed to the inner leaf.

Free survey in Paisley

Covering Paisley and the PA2 district. Tell us about the property and we will arrange a free survey and a fixed price.

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Cavity insulation for new builds and extensions for Paisley properties

We cover Paisley and the PA2 postcode district, including nearby Renfrew, Newton Mearns and Greenock. Paisley is one of the main towns we cover in Renfrewshire and Inverclyde.

Where a Paisley property has an extension or a conservatory, we check how the old and new walls meet, because that junction is often missed. Paisley properties with rendered or painted walls get a closer look at the outer finish, because cracked render can let rain behind it.

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.

In terms of approvals, in Paisley 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.

Extensions that join an older house

Where an extension meets an existing cavity wall, the junction is a weak point. We can borescope and fill the existing wall at the same time so the old and new walls perform together.

What is included in Paisley

  • Coordination with your bricklayers
  • Trays, closers and stop ends as drawn
  • Batts or boards to the specified U-value
  • Photo record for building control

Guide prices for Paisley

Cavity insulation for new builds and extensions guide prices
Cavity insulation for new builds and extensions guide pricesGuide price
Full-fill batts supplied and fitted, per m²£9–£16
Partial-fill boards supplied and fitted, per m²£14–£26

Prices are shown before any VAT; the VAT treatment for new-build work is confirmed on your quote. 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.

From enquiry to finish in Paisley:

  1. Send your details

    A minute online, or call the free number.

  2. We check the walls

    Construction, cavity width, debris, damp and wind-driven rain exposure.

  3. You decide

    Plain-English result and a fixed price, with no pressure to book.

  4. Job done properly

    Holes made good, paperwork handed over, guarantee details confirmed.

Last reviewed 19 October 2026.

Cavity insulation for new builds and extensions in Paisley: questions

Is there VAT on cavity insulation for new builds and extensions in Paisley?

Building a new home is usually zero-rated when supplied by the builder; supply-only materials are standard-rated. The VAT treatment is confirmed on your quote.

Do you cover Paisley?

Yes. Paisley and the PA2 postcode district are within our Renfrewshire and Inverclyde coverage, along with nearby Renfrew and Newton Mearns.

How much does cavity insulation for new builds and extensions cost in Paisley?

Our guide ranges for cavity insulation for new builds and extensions are shown on this page. The fixed price for your Paisley property is confirmed in writing after the survey, before any work starts.

How soon can you visit in Paisley?

We arrange dates when you get in touch. Availability varies through the year, so we give you real dates rather than a promise on the website.

Nearby towns

Book a free survey in Paisley

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