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Grangemouth · Forth Valley

Cavity insulation for new builds and extensions in Grangemouth

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. In Grangemouth we follow the Scotland rules on building standards, and confirm the route on your quote.

Free survey in Grangemouth

Covering Grangemouth and the FK3 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 Grangemouth properties

We cover Grangemouth and the FK3 postcode district, including nearby Falkirk, Alloa and Stirling. It is about 2 miles east of Falkirk.

Grangemouth properties with rendered or painted walls get a closer look at the outer finish, because cracked render can let rain behind it. Most Grangemouth houses built from the 1920s onwards have cavity walls, but the survey still checks each one: cavity width, debris, the condition of the brickwork and how exposed each wall is.

Every elevation is judged on its own exposure. The Forth Valley has a mix of moderate and more exposed sites. Hilltop, coastal and west-facing walls take the brunt of wind-driven rain, so the survey records exposure for each elevation before a material is chosen.

As for paperwork, in Grangemouth 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.

What we work from

Your architect's or designer's specification and the energy calculation for the job. We match the product, thickness and fixing to that spec, keep cavities clean as the walls rise, and fit cavity trays, closers and stop ends where shown so the building control inspection goes smoothly.

What is included in Grangemouth

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

Guide prices for Grangemouth

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.

The steps for cavity insulation for new builds and extensions in Grangemouth:

  1. Tell us about the property

    Postcode, property type and what you need.

  2. Free survey

    Walls, cavity, condition and exposure checked and photographed.

  3. Written result and price

    Suitable, suitable after repairs, or not suitable, with a fixed price.

  4. Work and paperwork

    Installation, making good, and the regulations and guarantee paperwork.

Last reviewed 19 October 2026.

Cavity insulation for new builds and extensions in Grangemouth: questions

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

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.

Which building regulations route applies in Grangemouth?

Grangemouth 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.

Do you cold-call in Grangemouth?

No. We only come out when you have asked us to. If someone cold-calls offering free insulation, check before you agree to anything.

Is the survey free in Grangemouth?

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

Nearby towns

Book a free survey in Grangemouth

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