Solid wall insulation · County Down
Solid wall insulation in Holywood
We quote solid wall insulation for homes in Holywood (BT18) and nearby Newtownabbey and Belfast, with guide prices online and a free survey to fix the price. On solid-walled houses in Holywood, the gable or the most weather-exposed wall is often the place to start.
- Free survey in BT18 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Holywood
Postcode, service and a phone number is all we need.
Part of every quote
- Breathable options for stone and lime-mortared walls
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
- Internal insulation suits single rooms or where the outside can't change
- Both can be done in stages, elevation by elevation or room by room
Homes and walls in Holywood
Surveys in Holywood also cover the surrounding BT18 district and towns such as Newtownabbey and Belfast. Holywood is about 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.
For solid-walled homes in Holywood, we check wall thickness and age first to confirm there's no cavity to fill.
- Postcode district
- BT18
- County or area
- County Down
- Nation
- Northern Ireland
- Nearby
- Newtownabbey, Belfast, Castlereagh, Carrickfergus
Approvals in Northern Ireland
In Northern Ireland, permitted development is set by the 2015 Order; in Holywood, changing a house's external appearance, and any work on flats or listed buildings, may need permission, so we check with the council.
External wall insulation is building work under the Building Regulations (Northern Ireland) 2012, so council building control is involved, with Technical Booklet F1 covering dwellings.
How can I tell if my walls are solid?
Measure the wall thickness at a window or door: about 225mm (9 inches) of brick usually means solid, while 260mm or more often means a cavity. On exposed brick, a pattern with bricks laid end-on (headers) every few courses points to solid construction. Stone walls are usually solid regardless of thickness. Age is a strong clue too — most homes built before the 1920s are solid-walled.
Solid wall insulation prices in Holywood
| Item | Guide price | Notes |
|---|---|---|
| External (EWI) | £105–£210 per m²0% VAT | By board and finish |
| Internal (IWI) | £75–£130 per m²0% VAT | Plus making good |
| Survey and written recommendation | Free with a quote |
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.
How it works
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.
Solid wall insulation in Holywood: questions
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
Is solid wall insulation worth it?
For many solid-walled homes it's one of the biggest single improvements to comfort, because the walls are often the largest heat-loss area. Savings depend on the home and heating, so we don't promise a figure.
Does solid wall insulation cause condensation?
It can if detailed poorly, particularly internally. A condensation risk check for the proposed build-up and careful detailing at joists, reveals and corners avoid it.
Do you cover Holywood?
Yes — we survey and quote solid wall insulation in Holywood (BT18) and nearby Newtownabbey, Belfast and Castlereagh, with a fixed written price before any work starts.