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Ballymena · County Antrim

Cavity insulation for new builds and extensions in Ballymena

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. We cover Ballymena and the wider BT42 postcode district, with the survey, result and fixed price all in writing.

Free survey in Ballymena

Covering Ballymena and the BT42 district. Tell us about the property and we will arrange a free survey and a fixed price.

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We use your details only to answer this enquiry and arrange your visit, sharing them only with the registered installer we appoint for your job and the providers named in our privacy notice. No marketing lists, no cold calls.

Cavity insulation for new builds and extensions for Ballymena properties

Ballymena sits in County Antrim, roughly 23 miles north-west of Belfast. We work across the BT42 district, including nearby Antrim, Larne and Newtownabbey.

Most Ballymena 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. Ballymena properties with rendered or painted walls get a closer look at the outer finish, because cracked render can let rain behind it.

Every elevation is judged on its own exposure. Parts of County Antrim 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 Ballymena inserting cavity wall insulation needs a building control application to the council before work starts.

Funding in Northern Ireland

In Northern Ireland, the Affordable Warmth Scheme helps eligible households with a gross income under £23,000.

Sources: NI Housing Executive: Affordable Warmth Scheme; Utility Regulator: NI Sustainable Energy Programme.

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 Ballymena

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

Guide prices for Ballymena

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 Ballymena:

  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 Ballymena: questions

Do you cold-call in Ballymena?

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

Are there grants for insulation in Ballymena?

In Northern Ireland, the Affordable Warmth Scheme helps eligible households with a gross income under £23,000. 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 Ballymena?

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

Which building regulations route applies in Ballymena?

Ballymena is in Northern Ireland, so inserting cavity wall insulation needs a building control application to the council before work starts. We confirm the route in writing on your quote.

Nearby towns

Book a free survey in Ballymena

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