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Stornoway · Highlands and Islands

Cavity insulation for new builds and extensions in Stornoway

From the first survey to the paperwork, cavity insulation for new builds and extensions in Stornoway is handled by one team and one contract. 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 Stornoway

Covering Stornoway and the HS1 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 Stornoway properties

If your property is in Stornoway or the HS1 district, it is within our Highlands and Islands coverage. Island addresses are surveyed by arrangement.

For semi-detached and terraced homes in Stornoway, cavity barriers are fitted where your wall meets your neighbour's so the fill stays on your side. Stornoway 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 the Highlands and Islands 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 Stornoway 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 Stornoway

  • Trays, closers and stop ends as drawn
  • Batts or boards to the specified U-value
  • Coordination with your bricklayers
  • Clean-cavity working

Guide prices for Stornoway

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.

What happens next for a Stornoway property:

  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 insulation for new builds and extensions in Stornoway: questions

Are there grants for insulation in Stornoway?

In Scotland, Home Energy Scotland is the route to the Home Energy Scotland Grant and Loan and Warmer Homes Scotland. We cannot promise funding, but we will point you to the right official route.

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

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

Do you cover Stornoway?

Yes. Stornoway and the HS1 postcode district are within our Highlands and Islands coverage.

Do you cold-call in Stornoway?

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

Book a free survey in Stornoway

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