Wood fibre EWI · County Down
Wood fibre insulation for older homes in Castlereagh
Quotes for wood fibre external wall insulation in Castlereagh list the system, the detailing and the VAT position in writing, so you know exactly what's included. For period homes in Castlereagh, the survey looks closely at existing lime mortars and any cement patching that may trap moisture.
- Free survey in BT5 and nearby
- Guide price from £150 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Castlereagh
Postcode, service and a phone number is all we need.
Part of every quote
- Often the most suitable EWI where planning allows on older properties
- Thicker than foam for the same U-value
- Compatible with lime renders used on traditional buildings
- Vapour-open and hygroscopic — buffers moisture rather than trapping it
What we look for in Castlereagh
As well as Castlereagh itself, we quote in Belfast, Holywood and Newtownabbey. It's roughly 11 miles from Castlereagh to Bangor (County Down), the largest town in 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.
If your home in Castlereagh is in a conservation area, we check the council's position on render before suggesting wood fibre EWI.
- Postcode district
- BT5
- County or area
- County Down
- Nation
- Northern Ireland
- Nearby
- Belfast, Holywood, Newtownabbey, Lisburn
Planning and building control in Northern Ireland
Before quoting in Castlereagh, we check whether the property is listed or in a conservation area, which changes what needs planning permission in Northern Ireland.
Council building control in Northern Ireland checks insulation work of this kind; the quote says how the application is handled.
Why do older walls need breathable insulation?
Stone and early brick walls were built with lime mortars and renders that let moisture in and out. Sealing them with impermeable materials can trap water in the wall, leading to damp and frost damage. Wood fibre keeps the build-up open to vapour, and its ability to absorb and release moisture helps the wall stay in balance.
Wood fibre insulation for older homes prices in Castlereagh
| Item | Guide price | Notes |
|---|---|---|
| Wood fibre + lime render system | £150–£210 per m²0% VAT | Excluding scaffold |
| Cottage, about 90 m² of wall | £15,300–£22,1000% VAT | Including scaffold |
| Lime render only (no insulation) | £78–£132 per m²inc VAT | See lime render |
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. Prices include VAT at 20%.
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.
Wood fibre EWI in Castlereagh: questions
Does wood fibre need a lime render?
It needs the render specified by the system manufacturer, which is usually lime or mineral based.
Is wood fibre insulation fireproof?
No — it's a timber product. It chars rather than flaming readily, but it is combustible, so it's used on low-rise buildings within a tested system and never where non-combustible materials are required.
Can wood fibre go on a stone wall?
Yes, after levelling. Rubble stone is often uneven, so a levelling coat or adapted fixing method is used first.
Do you cover Castlereagh?
Yes — we survey and quote wood fibre external wall insulation in Castlereagh (BT5) and nearby Belfast, Holywood and Newtownabbey, with a fixed written price before any work starts.