Gwynedd · Wales
Render and insulation in Caernarfon
Render and insulation in Caernarfon: guide prices online, then a free survey and fixed written quote.
- Free survey in LL55 and nearby
- Fixed written price before work starts
- Guide prices online
Free survey in Caernarfon
Tell us about the property. We reply on working days.
Services
Services in Caernarfon
External wall insulation
- External wall insulation in Caernarfon
- EPS insulation in Caernarfon
- Mineral wool EWI in Caernarfon
- Wood fibre EWI in Caernarfon
- Non-traditional houses in Caernarfon
- Park home insulation in Caernarfon
- Flats and blocks in Caernarfon
- Commercial EWI in Caernarfon
Solid and internal wall insulation
- Solid wall insulation in Caernarfon
- Internal wall insulation in Caernarfon
- Survey and quote in Caernarfon
Render finishes
- Insulated render in Caernarfon
- Silicone render in Caernarfon
- Monocouche render in Caernarfon
- Lime render in Caernarfon
- Brick slip EWI in Caernarfon
- Acrylic render in Caernarfon
Re-rendering, repairs and upkeep
Homes and walls in Caernarfon
We cover Caernarfon and nearby Llangefni, Bangor (Gwynedd) and Holyhead. Caernarfon sits around 8 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.
- Postcode district
- LL55
- County or area
- Gwynedd
- Nation
- Wales
Approvals in Wales
We check Caernarfon 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.
Typical jobs and guide prices
| Item | Guide price | Notes |
|---|---|---|
| Render repairs | From £475inc VAT | Small repairs, single visit |
| Monocouche render | From £54 per m² + scaffoldinc VAT | Monocouche on blockwork |
| External wall insulation | From £105 per m² + scaffold0% VAT | EPS system with silicone render |
| Lime render | From £78 per m² + scaffoldinc VAT | Lime render, three-coat |
Insulation prices for homes are totals (0% VAT until 31 March 2027); render and repair prices include VAT at 20%. Confirmed in writing after a free survey. Full price guide
Nearby towns
Caernarfon: questions
Do you cover Caernarfon?
Yes — we survey and quote in Caernarfon (LL55) and nearby Llangefni, Bangor (Gwynedd) and Holyhead.
How much does external wall insulation cost in Caernarfon?
Our guide is £105–£170 per m² depending on the system, plus scaffolding — roughly £10,200–£17,700 for a typical three-bed semi with EPS and silicone render. Installing insulation in a home is zero-rated for VAT until 31 March 2027, so that's the total. A free survey fixes the price.
Do I need planning permission in Caernarfon?
For homes in Caernarfon, the local planning authority decides any borderline cases; changing a brick house to render, or work on flats, usually needs an application in Wales.
Is VAT charged on wall insulation?
Installing wall insulation in homes is zero-rated until 31 March 2027, then 5%, so our insulation prices are totals. Render-only work and repairs carry VAT at 20%, and our prices for them include it.