Brick Slip EWI in Coulsdon | 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 Coulsdon

Coulsdon is in the CR5 postcode district, about 13 miles from London. 6 other towns we cover are within 25 miles.

From Coulsdon we also cover Purley (2 miles away), Banstead (3 miles) and Wallington (3 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 Coulsdon: Purley (2 miles), Banstead (3 miles), Wallington (3 miles), Sutton (3 miles), Carshalton (4 miles), South Croydon (4 miles).

Cost in Coulsdon

Guide prices for brick slip external wall insulation in Coulsdon 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
Best for: Brick streets, planning-sensitive fronts

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.

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Rules that apply in Coulsdon

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 Coulsdon: questions

How much should I budget for brick slip external wall insulation in Coulsdon?

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 Coulsdon and fixes the total in writing.

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

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 Coulsdon?

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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Brick slip external wall insulation in Coulsdon