Areas · England
Render and insulation in Cornwall
We survey and quote homes and buildings throughout Cornwall — from Redruth to Falmouth — for insulation, render and repairs.
- Free survey and fixed written price
- Planning and building control checked for England
- Guide prices online
Free survey in Cornwall
Tell us about the property. We reply on working days.
Services
Services in Cornwall
External wall insulation
- External wall insulation in Cornwall
- EPS insulation in Cornwall
- Mineral wool EWI in Cornwall
- Wood fibre EWI in Cornwall
- Non-traditional houses in Cornwall
- Park home insulation in Cornwall
- Flats and blocks in Cornwall
- Commercial EWI in Cornwall
Solid and internal wall insulation
Render finishes
- Insulated render in Cornwall
- Silicone render in Cornwall
- Monocouche render in Cornwall
- Lime render in Cornwall
- Brick slip EWI in Cornwall
- Acrylic render in Cornwall
Re-rendering, repairs and upkeep
Homes and walls in Cornwall
The South West has many stone and solid-walled cottages, exposed coastal properties and a share of post-war system-built houses, including types such as the Cornish Unit.
Parts of Cornwall 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
- England
- Region
- South West
- Towns with local pages
- 8
Planning and building control in England
For houses, external wall insulation and render are often permitted development where the finish looks similar to the existing walls. Planning permission is usually needed in conservation areas, National Parks, National Landscapes, the Broads and World Heritage Sites (where cladding a house in stone, artificial stone, pebble dash, render, timber, plastic or tiles isn't permitted development), for flats and maisonettes, for commercial buildings, under an Article 4 direction, or where the look changes noticeably. Listed buildings need listed building consent.
Renovating more than half of a wall's area — insulating it, or stripping and re-rendering it — or more than a quarter of the building's whole external envelope brings in the energy requirements of Part L, so building control needs to be involved and the wall should reach about 0.30 W/m²K where that's technically, functionally and economically feasible.
Typical jobs and guide prices
| Item | Guide price | Notes |
|---|---|---|
| Re-rendering | From £90 per m² + scaffoldinc VAT | Strip and re-render (silicone system) |
| Render cleaning and treatment | From £10 per m²inc VAT | Soft wash and biocide |
| Mineral wool external wall insulation | From £125 per m² + scaffold0% VAT | Mineral wool + mineral or silicone render |
| Monocouche render | From £54 per m² + scaffoldinc VAT | Monocouche on blockwork |
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 Cornwall
Cornwall: questions
Do you work across all of Cornwall?
Yes — we survey and quote across Cornwall, including Redruth, Falmouth, St Austell, Truro, Camborne, Penzance.
Do I need planning permission for external wall insulation in Cornwall?
Before quoting in Cornwall, we check whether the property is in a conservation area, under an Article 4 direction or listed, because that decides whether changing the outside needs planning permission.
Are there grants for wall insulation in England?
ECO4 runs until 31 December 2026 for eligible households, and some councils run Warm Homes: Local Grant schemes. The Warm Homes Plan sets out further grants and low-interest loans being introduced in phases.