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Bangor, County Down · County Down

Cavity insulation for new builds and extensions in Bangor, County Down

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. In Bangor we follow the Northern Ireland rules on building control applications, and confirm the route on your quote.

Free survey in Bangor, County Down

Covering Bangor and the BT20 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 Bangor, County Down properties

Bangor is among the towns we cover in County Down, alongside Newtownards and Downpatrick. Bangor is one of the main towns we cover in County Down.

If a wall in Bangor is not suitable, for example because of an undiagnosed damp patch or a very exposed gable, you are told so in writing with the reason. Most Bangor 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.

Local weather affects which walls can be filled. Parts of County Down 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.

On the rules side, in Bangor 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 Bangor, County Down

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

Guide prices for Bangor, County Down

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 Bangor:

  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 for new builds and extensions in Bangor, County Down: questions

Do you cover Bangor?

Yes. Bangor and the BT20 postcode district are within our County Down coverage, along with nearby Newtownards and Downpatrick.

Which building regulations route applies in Bangor?

Bangor 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.

Is my Bangor home too exposed for cavity insulation?

Parts of County Down 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.

Is the survey free in Bangor?

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

Nearby towns

Book a free survey in Bangor, County Down

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