Brick slip external wall insulation in Eltham
Homeowners in Eltham 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 Eltham
Eltham is in the SE9 postcode district, about 9 miles from London. 6 other towns we cover are within 25 miles.
Our Eltham surveys cover the SE9 district and the surrounding area, including Blackheath, Welling and Catford.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Eltham home sets out how each detail will be built.
Brick slip EWI near Eltham: Blackheath (2 miles), Welling (3 miles), Catford (3 miles), Greenwich (3 miles), Bexley (4 miles), Beckenham (4 miles).
Cost in Eltham
Guide prices for brick slip external wall insulation in Eltham 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.
What moves the price most is the board and finish you choose, the access around the house, and details such as roofline extensions or moving a gas meter.
Key facts
- Corners
- L-shaped corner slips
- Weight
- Heavier than render; anchor pattern checked
- Best for
- Brick streets, planning-sensitive fronts
Why choose it
- Often an easier route through planning than render on brick streets
- Very durable, low-maintenance face
- Can mix with render on side and rear walls to manage cost
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 Eltham
- EPS insulated render
- Mineral wool EWI
- Wood fibre EWI
- Insulated cladding
- Insulating lime render
- Semi-detached EWI
- Social housing EWI
- EWI surveys
Rules that apply in Eltham
- 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 Eltham: questions
Are there grants for external wall insulation in Eltham?
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.
Do you cover Blackheath as well as Eltham?
Yes. From Eltham we also cover Blackheath, Welling and Catford, and the rest of Greater London.
How long will the work take in Eltham?
Two to six weeks on site for most houses, depending on size: bungalows are quicker, detached houses longer, weather allowing. Render isn't applied in rain or frost.
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