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Dunoon · Argyll and Bute

Cavity insulation top-up in Dunoon

From the first survey to the paperwork, cavity insulation top-up in Dunoon is handled by one team and one contract. A cavity top-up fills voids left by an older installation: missed panels around windows, settled fibre, areas disturbed by an extension or new window.

Free survey in Dunoon

Covering Dunoon and the PA23 district. Tell us about the property and we will arrange a free survey and a fixed price.

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Cavity insulation top-up for Dunoon properties

Dunoon sits in Argyll and Bute, roughly 8 miles south-west of Helensburgh. We work across the PA23 district, including nearby Helensburgh and Oban.

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

Before any material is chosen, exposure is checked. Parts of Argyll and Bute 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.

For regulations, in Dunoon 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.

How do I know if my walls need a top-up?

Cold patches on internal walls, a thermal image showing uneven heat loss, or an EPC that says 'filled cavity' when parts of the house feel colder are all signs. Extensions are a common cause: the new wall is insulated as built, but the old wall it joins may have been left partly empty.

What is included in Dunoon

  • Borescope survey at several points
  • Written result with photos
  • Making good
  • Map of filled and empty sections

Guide prices for Dunoon

Cavity insulation top-up guide prices
Cavity insulation top-up guide pricesGuide price
Detached house£1,295–£2,295
Semi-detached house£795–£1,495
End-terrace house£695–£1,295
Detached bungalow£695–£1,295
Semi-detached bungalow£595–£995
Mid-terrace house£595–£995

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.

The steps for cavity insulation top-up in Dunoon:

  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 top-up in Dunoon: questions

Which building regulations route applies in Dunoon?

Dunoon 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.

How soon can you visit in Dunoon?

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.

Is the survey free in Dunoon?

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

How much does cavity insulation top-up cost in Dunoon?

Our guide ranges for cavity insulation top-up are shown on this page. The fixed price for your Dunoon property is confirmed in writing after the survey, before any work starts.

Nearby towns

Book a free survey in Dunoon

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