Brick Slip EWI in Barnes | Prices & Free Survey

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 Barnes

Barnes is in the SW13 postcode district, about 6 miles from London. 6 other towns we cover are within 25 miles.

From Barnes we also cover Chiswick (1 miles away), Putney (2 miles) and Fulham (2 miles).

Whatever the exposure of your street, the details at sills, eaves and the base of the wall are what keep an EWI system dry, and we draw them before work starts.

Brick slip EWI near Barnes: Chiswick (1 mile), Putney (2 miles), Fulham (2 miles), Shepherds Bush (2 miles), Richmond (3 miles), Acton (3 miles).

Cost in Barnes

Guide prices for brick slip external wall insulation in Barnes 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.

The final figure depends on wall area, the number of windows and doors, the finish and how much work the roofline, sills and services need.

Key facts

Bond: Stretcher, Flemish-effect or to match
Insulation underneath: EPS or mineral wool, as certified
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

Can brick slips match my existing bricks?

Slips come in a wide range of colours and textures, and a close match is often possible. An exact match to weathered Victorian brick is hard; we bring samples to the survey and you see them against your wall in daylight before ordering.

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Rules that apply in Barnes

Building regulations: Insulating more than half of a wall, or more than a quarter of the whole building envelope, counts as renovating a thermal element under the Building Regulations, so the wall should reach 0.30 W/m²K where that is technically, functionally and economically feasible, and building control must be involved.
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 Barnes: questions

Do I need planning permission for external wall insulation in Barnes?

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.

How long will the work take in Barnes?

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.

Which EWI system suits homes in Barnes?

It depends on the walls. Most brick houses in Barnes 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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Brick slip external wall insulation in Barnes