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Craigavon · County Armagh

Cavity insulation for new builds and extensions in Craigavon

Cavity insulation for new builds and extensions in Craigavon starts with a free survey of the property, then a written result and a fixed price before any work is booked. 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 Craigavon

Covering Craigavon and the BT65 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 Craigavon properties

If your property is in Craigavon or the BT65 district or nearby Lurgan, Portadown and Armagh, it is within our County Armagh coverage. Craigavon is one of the main towns we cover in County Armagh.

Where a Craigavon property has an extension or a conservatory, we check how the old and new walls meet, because that junction is often missed. Craigavon properties with rendered or painted walls get a closer look at the outer finish, because cracked render can let rain behind it.

Wind-driven rain is the first thing the surveyor weighs up. Parts of County Armagh 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 Craigavon 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 Craigavon

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

Guide prices for Craigavon

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.

How it works in Craigavon:

  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 Craigavon: questions

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

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

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

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.

Is my Craigavon home too exposed for cavity insulation?

Parts of County Armagh get some of the heaviest wind-driven rain in the UK, so the survey is stricter and some walls are better left unfilled. The survey records the exposure of each wall before recommending a material, or recommending against filling.

Are there grants for insulation in Craigavon?

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.

Nearby towns

Book a free survey in Craigavon

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