Internal wall insulation · County Down
Internal wall insulation in Holywood
Homeowners and landlords in Holywood can get a free survey and a fixed written quote for internal wall insulation, covering BT18 and the surrounding area. We plan internal insulation in Holywood homes room by room so you keep the rest of the house usable.
- Free survey in BT18 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Holywood
Postcode, service and a phone number is all we need.
What the job covers
- Can be done one room at a time during a renovation
- Needs careful detailing at floor joists, reveals and corners
- Keeps the outside of the house exactly as it is
- Loses roughly 50–100mm per insulated wall
Holywood: walls, weather and approvals
As well as Holywood itself, we quote in Newtownabbey, Belfast and Castlereagh. Holywood sits around 6 miles from Bangor (County Down). Northern Ireland has many rendered and pebble-dashed homes, older solid-walled rural houses, and estates built by the Housing Executive.
Exposure to wind-driven rain varies across County Down: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
Where a property in Holywood is in a conservation area or the front elevation must stay unchanged, internal insulation is often the practical route.
- Postcode district
- BT18
- County or area
- County Down
- Nation
- Northern Ireland
- Nearby
- Newtownabbey, Belfast, Castlereagh, Carrickfergus
Permissions in Northern Ireland
Internal insulation rarely needs planning permission; listed buildings need consent for internal changes.
Council building control in Northern Ireland checks insulation work of this kind; the quote says how the application is handled.
What are the options for internal insulation?
- Insulated plasterboard — PIR or phenolic foam bonded to plasterboard, fixed to the wall and skimmed. Thinnest option.
- Insulated stud wall — a timber or metal frame filled with insulation, with a vapour control layer and plasterboard. Takes more space but runs services easily.
- Wood fibre and lime — breathable boards finished in lime plaster, for older walls that need to manage moisture.
Internal wall insulation prices in Holywood
| Item | Guide price | Notes |
|---|---|---|
| Insulated plasterboard, supplied and skimmed | £75–£110 per m²0% VAT | |
| Insulated stud wall | £90–£130 per m²0% VAT | |
| Typical bedroom, one external wall | £1,795–£2,9950% VAT | Including making good |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
From enquiry to finished wall
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Internal wall insulation in Holywood: questions
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
What happens to my radiators and sockets?
They're taken off and refitted on the new wall face. Electrical work is done by a qualified electrician.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
Do you cover Holywood?
Yes — we survey and quote internal wall insulation in Holywood (BT18) and nearby Newtownabbey, Belfast and Castlereagh, with a fixed written price before any work starts.