Non-traditional houses · Gwynedd
Non-traditional and concrete house insulation in Llangefni
We quote non-traditional house insulation for homes in Llangefni (LL77) and nearby Bangor (Gwynedd) and Caernarfon, with guide prices online and a free survey to fix the price. Where a home in Llangefni is system-built, the first job is confirming the construction type.
- Free survey in LL77 and nearby
- Guide price from £120 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Llangefni
Postcode, service and a phone number is all we need.
Part of every quote
- The survey identifies the construction type before anything is specified
- Fixing design depends on the panel or frame behind the wall
- EWI is not a structural repair for PRC houses designated defective
- Most system-built homes have thin, cold walls and no fillable cavity
Before we quote in Llangefni
We cover Llangefni and nearby Bangor (Gwynedd), Caernarfon and Holyhead. It's roughly 8 miles from Llangefni to Bangor (Gwynedd), the largest town in Gwynedd. North Wales has many solid stone and slate-built homes, Victorian seaside terraces and post-war council estates.
Parts of Gwynedd fall in the higher wind-driven rain exposure bands, especially coastal and upland sites, so render specification, movement joints and detailing at cills, verges and the base of the wall matter more than usual.
For concrete houses in Llangefni, we report any visible spalling or cracking before quoting the insulation, not after.
- Postcode district
- LL77
- County or area
- Gwynedd
- Nation
- Wales
- Nearby
- Bangor (Gwynedd), Caernarfon, Holyhead, Llandudno
Approvals in Wales
We check Llangefni addresses for conservation areas and listing before quoting, because Welsh permitted development rules don't cover every external change.
Welsh Building Regulations expect walls to be upgraded when a substantial area is renewed, and building control signs the work off.
Does EWI fix mortgage problems with PRC houses?
Not on its own. Some precast reinforced concrete (PRC) house types were designated defective, and many lenders want a certified structural repair before they will lend. Insulation and render over the outside is not that repair. Other types, such as Wimpey no-fines, are generally treated differently. If mortgageability matters, speak to your lender or a surveyor before booking any work.
Non-traditional and concrete house insulation prices in Llangefni
| Item | Guide price | Notes |
|---|---|---|
| EWI on concrete or steel-framed walls | £120–£180 per m²0% VAT | Includes extra preparation |
| Semi-detached, full house | £11,400–£21,2000% VAT | 80–100 m² of wall, including scaffold |
| Concrete repairs found at survey | Priced separately | Only where needed |
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
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
Non-traditional houses in Llangefni: questions
Will EWI make my house mortgageable?
It can make a house more attractive and better insulated, but it does not replace a certified structural repair where a lender requires one. Ask your lender before relying on it.
Can you put EWI on a BISF house?
Yes, with care. The steel frame and upper-storey cladding need a system and fixing method designed for that construction, and the condition of the frame should be understood first.
Can you insulate a Wimpey no-fines house?
Yes. No-fines houses have solid poured-concrete walls with no cavity, so EWI is the usual route. The survey checks the concrete condition first.
Do you cover Llangefni?
Yes — we survey and quote non-traditional house insulation in Llangefni (LL77) and nearby Bangor (Gwynedd), Caernarfon and Holyhead, with a fixed written price before any work starts.