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County Armagh · Northern Ireland

Cavity wall insulation for flats in County Armagh

For homes, landlords and businesses in County Armagh, cavity wall insulation for flats starts with a free survey and a plain-English result. Flats share their outer walls, so cavity wall insulation is normally done for the whole block at once with the freeholder's agreement.

Three-storey 1960s red brick block of flats

Free survey in County Armagh

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 wall insulation for flats across County Armagh

We cover 4 towns in County Armagh: Craigavon, Portadown, Armagh and Lurgan.

Local weather affects which walls can be filled. 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.

Per-address photo records for County Armagh properties make compliance files and EPC updates straightforward. Work on County Armagh rented homes and blocks is booked around tenants and residents, with access arranged through your agent if you prefer.

Building control in Northern Ireland

In Northern Ireland, inserting insulation into an existing cavity wall needs a building control application to your council before the work. We make sure the application route is agreed and confirmed in writing before any drilling starts.

Funding in Northern Ireland

  • The Affordable Warmth Scheme, run with the NI Housing Executive, helps owner-occupiers and private tenants with a total gross household income under £23,000; cavity wall insulation is a priority measure where suitable.
  • The NI Sustainable Energy Programme funds energy efficiency schemes through participating providers.
  • ECO4 does not apply in Northern Ireland.

Sources: Building Control NI: frequently asked questions; Belfast City Council: what are the building regulations; NI Housing Executive: Affordable Warmth Scheme; Utility Regulator: NI Sustainable Energy Programme.

Why one flat cannot usually be done alone

The cavity runs continuously across the building. The Energy Saving Trust notes that flats need agreement from the whole block. Filling one flat's walls in isolation leaves gaps, and the freeholder normally owns the structure.

What is included

  • Block survey
  • Freeholder and agent coordination
  • Leaseholder information sheet
  • Per-flat pricing

Cavity wall insulation for flats prices in County Armagh

Cavity wall insulation for flats guide prices
Cavity wall insulation for flats guide pricesGuide price
Per flat, whole-block fill (low-rise)£495–£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.

From enquiry to finish in County Armagh:

  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 wall insulation for flats in County Armagh: questions

Do you cover all of County Armagh?

Yes. We cover 4 towns across County Armagh, including Craigavon, Portadown, Armagh and Lurgan, and the villages around them. Island and remote addresses are surveyed by arrangement.

How much does cavity wall insulation for flats cost in County Armagh?

Our guide ranges for cavity wall insulation for flats are shown on this page. The fixed price for your County Armagh property is confirmed in writing after the survey, before any work starts.

How soon can you visit in County Armagh?

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 County Armagh?

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

Cavity wall insulation for flats in nearby areas

Book a free survey in County Armagh

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