Solid wall insulation · Gwynedd
Solid wall insulation in Holyhead
Solid wall insulation in Holyhead: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. For Holyhead homeowners weighing external against internal insulation, the survey sets out both with prices.
- Free survey in LL65 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Holyhead
Postcode, service and a phone number is all we need.
What's included
- Both can be done in stages, elevation by elevation or room by room
- In England and Wales, Building Regulations apply when more than half of a wall is treated
- External insulation keeps room sizes and treats cold bridges well
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
Before we quote in Holyhead
We cover Holyhead and nearby Llangefni, Caernarfon and Bangor (Gwynedd). Holyhead is about 22 miles from Bangor (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 solid-walled homes in Holyhead, we check wall thickness and age first to confirm there's no cavity to fill.
- Postcode district
- LL65
- County or area
- Gwynedd
- Nation
- Wales
- Nearby
- Llangefni, Caernarfon, Bangor (Gwynedd), Llandudno
Planning and building control in Wales
We check Holyhead addresses for conservation areas and listing before quoting, because Welsh permitted development rules don't cover every external change.
In Wales, insulating or re-rendering more than half of a wall's area is treated as renovating a thermal element under Approved Document L (Wales), so building control is involved before work starts.
What does solid wall insulation cost?
External systems run at roughly £105–£210 per m² of wall depending on the board and finish. Internal insulation is roughly £75–£130 per m², plus the cost of moving radiators, sockets and kitchen units.
Solid wall insulation prices in Holyhead
| 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.
From enquiry to finished wall
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Solid wall insulation in Holyhead: questions
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.
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
Can I get a grant for solid wall insulation?
Some schemes cover it for eligible households — for example ECO4 until 31 December 2026, Home Energy Scotland's grant and loan, Wales' Warm Homes Nest and NI's Affordable Warmth Scheme. Each has its own eligibility and installer rules; see our grants guide.
Do you cover Holyhead?
Yes — we survey and quote solid wall insulation in Holyhead (LL65) and nearby Llangefni, Caernarfon and Bangor (Gwynedd), with a fixed written price before any work starts.