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Bodmin · Cornwall

Cavity insulation top-up in Bodmin

For homes and buildings in Bodmin, cavity insulation top-up is arranged survey-first: we check the property, tell you plainly what we found, and price it. 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 Bodmin

Covering Bodmin and the PL31 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 Bodmin properties

Bodmin sits in Cornwall, roughly 20 miles north-east of Truro. We work across the PL31 district, including nearby St Austell, Newquay and Truro.

A suitable wall in Bodmin is usually filled in a single day from outside, with drill holes made good to match the pointing. Where a Bodmin 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 Cornwall 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.

As for paperwork, in Bodmin filling a cavity is notifiable building work and needs a building notice or competent-person self-certification.

Funding in England

In England, ECO4 runs to 31 December 2026 and Warm Homes: Local Grant supports low-income households through councils.

Sources: GOV.UK: extending the ECO4 end date, government response; GOV.UK: Warm Homes Plan.

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 Bodmin

  • Map of filled and empty sections
  • Targeted fill with a compatible system
  • Borescope survey at several points
  • Making good

Guide prices for Bodmin

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.

What happens next for a Bodmin 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 top-up in Bodmin: questions

Which building regulations route applies in Bodmin?

Bodmin is in England, so filling a cavity is notifiable building work and needs a building notice or competent-person self-certification. We confirm the route in writing on your quote.

Is there VAT on cavity insulation top-up in Bodmin?

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

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

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

Are there grants for insulation in Bodmin?

In England, ECO4 runs to 31 December 2026 and Warm Homes: Local Grant supports low-income households through councils. We cannot promise funding, but we will point you to the right official route.

Nearby towns

Book a free survey in Bodmin

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