Areas · Wales
Render and insulation in Gwynedd
We survey and quote homes and buildings throughout Gwynedd — from Bangor (Gwynedd) to Holyhead — for insulation, render and repairs.
- Free survey and fixed written price
- Planning and building control checked for Wales
- Guide prices online
Free survey in Gwynedd
Tell us about the property. We reply on working days.
Services
Services in Gwynedd
External wall insulation
- External wall insulation in Gwynedd
- EPS insulation in Gwynedd
- Mineral wool EWI in Gwynedd
- Wood fibre EWI in Gwynedd
- Non-traditional houses in Gwynedd
- Park home insulation in Gwynedd
- Flats and blocks in Gwynedd
- Commercial EWI in Gwynedd
Solid and internal wall insulation
Render finishes
- Insulated render in Gwynedd
- Silicone render in Gwynedd
- Monocouche render in Gwynedd
- Lime render in Gwynedd
- Brick slip EWI in Gwynedd
- Acrylic render in Gwynedd
Re-rendering, repairs and upkeep
Homes and walls 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.
- Nation
- Wales
- Region
- North Wales
- Towns with local pages
- 4
Planning and building control in Wales
Permitted development rules for houses in Wales are similar to England's: a similar-appearance finish on a house is often permitted, while conservation areas, National Parks, Areas of Outstanding Natural Beauty, flats, commercial buildings and listed buildings need permission or consent. Your local planning authority has the final word.
The Building Regulations as they apply in Wales treat insulating or re-rendering more than half of a wall's area, or more than a quarter of the building's whole envelope, as renovating a thermal element, with Approved Document L (Wales) setting the target. Building control is involved before work starts.
Typical jobs and guide prices
| Item | Guide price | Notes |
|---|---|---|
| Render cleaning and treatment | From £10 per m²inc VAT | Soft wash and biocide |
| External wall insulation | From £105 per m² + scaffold0% VAT | EPS system with silicone render |
| Render repairs | From £475inc VAT | Small repairs, single visit |
| 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
Towns in Gwynedd
Gwynedd: questions
Do you work across all of Gwynedd?
Yes — we survey and quote across Gwynedd, including Bangor (Gwynedd), Holyhead, Caernarfon, Llangefni.
Do I need planning permission for external wall insulation in Gwynedd?
For homes in Gwynedd, the local planning authority decides any borderline cases; changing a brick house to render, or work on flats, usually needs an application in Wales.
Are there grants for wall insulation in Wales?
Warm Homes Nest offers free improvements to eligible low-income households in Wales, and ECO4 runs until 31 December 2026.