Brick Slip EWI in Isleworth | Prices & Free Survey

Brick slip external wall insulation in Isleworth

Looking for brick slip external wall insulation in Isleworth? We survey homes across Greater London and the TW7 postcode district, measure every wall and give you a fixed price in writing before any work is booked.

£185–£265 per m²installed, slips and pointing included; scaffolding priced per house

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 Isleworth

Isleworth is in the TW7 postcode district, about 10 miles from London. 6 other towns we cover are within 25 miles.

From Isleworth we also cover Hounslow (1 miles away), Heston (2 miles) and Richmond (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 Isleworth: Hounslow (1 mile), Heston (2 miles), Richmond (2 miles), Southall (3 miles), Hanworth (3 miles), Feltham (4 miles).

Cost in Isleworth

Guide prices for brick slip external wall insulation in Isleworth 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

Finish: Real clay brick slips, 10–20mm
Bond: Stretcher, Flemish-effect or to match
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
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.

More services in Isleworth

Rules that apply in Isleworth

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 Isleworth: questions

Is building control approval needed for brick slip external wall insulation in Isleworth?

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. We arrange it as part of the job.

Do you cover Hounslow as well as Isleworth?

Yes. From Isleworth we also cover Hounslow, Heston and Richmond, and the rest of Greater London.

Which EWI system suits homes in Isleworth?

It depends on the walls. Most brick houses in Isleworth 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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