Brick slip external wall insulation in Carshalton
Homeowners in Carshalton look at brick slip external wall insulation for warmer rooms, lower heat loss and a new exterior in one job. Here is how it works, what it costs and which England rules apply.
What is brick slip external wall insulation?
Brick slip external wall insulation is an EWI system finished with 10–20mm thick clay brick slips, bonded with adhesive onto a reinforced basecoat over the insulation and then pointed. Corner slips return around external corners so the finish reads as solid brickwork.
Brick slip EWI around Carshalton
Carshalton is in the SM5 postcode district, about 10 miles from London. 6 other towns we cover are within 25 miles.
Our Carshalton surveys cover the SM5 district and the surrounding area, including Wallington, Sutton and Mitcham.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Carshalton home sets out how each detail will be built.
Brick slip EWI near Carshalton: Wallington (1 mile), Sutton (2 miles), Mitcham (2 miles), Morden (2 miles), Croydon (3 miles), South Croydon (3 miles).
Cost in Carshalton
Guide prices for brick slip external wall insulation in Carshalton run from about £185 to £265 per square metre installed, slips and pointing included; scaffolding priced per house, with VAT at 0% on homes until 31 March 2027.
Bays, gables, conservatory junctions and narrow side passages take longer than plain walls, so the survey prices your actual house rather than an average.
Key facts
- Finish
- Real clay brick slips, 10–20mm
- Corners
- L-shaped corner slips
- Weight
- Heavier than render; anchor pattern checked
Why choose it
- Keeps a real brick appearance
- Often an easier route through planning than render on brick streets
- Very durable, low-maintenance face
Why is a brick slip finish more expensive?
Slips are a material cost on their own, they are laid by hand course by course, corners need special pieces, and the whole face is pointed. Expect brick slip finishes to cost noticeably more per square metre than render.
More services in Carshalton
- Mineral wool EWI
- Insulating lime render
- Silicone render finish
- Mineral & silicate render
- Pebbledash & dry dash EWI
- Solid wall insulation
- EWI repairs
- Failed EWI remediation
Rules that apply in Carshalton
- Planning
- On a house, external wall insulation is usually permitted development if the finish looks similar to the existing walls. Render or cladding on a house in a conservation area, National Park, National Landscape (AONB), the Broads or a World Heritage Site needs planning permission. Flats and maisonettes have no householder permitted development rights, listed buildings need listed building consent, and an Article 4 direction can remove rights locally.
- VAT
- Installing insulation in a home is zero-rated for VAT until 31 March 2027, then 5%.
Checked October 2026. Rules change, so we confirm them for your address at survey.
Brick slip EWI in Carshalton: questions
How much should I budget for brick slip external wall insulation in Carshalton?
Budget around £185–£265 per square metre of wall for the system and finish, plus scaffolding priced per house. The survey measures your walls in Carshalton and fixes the total in writing.
Are there grants for external wall insulation in Carshalton?
Low-income households in homes rated below EPC C can apply for Warm Homes: Local Grant where their council is taking part. The Great British Insulation Scheme closed on 31 March 2026, and ECO4 closes on 31 December 2026; its final months are for finishing and putting right existing work. Grant schemes use their own approved installers, so check a scheme's installer rules before booking; our quotes are for privately funded work unless we confirm otherwise in writing.
Which EWI system suits homes in Carshalton?
It depends on the walls. Most brick houses in Carshalton suit EPS with silicone render; older stone or lime-built walls suit wood fibre or insulating lime render; and blocks need mineral wool. The free survey recommends one and explains why.
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