Brick Slip EWI in Hounslow | 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 Hounslow

Hounslow is in the TW3 postcode district, about 10 miles from London. 6 other towns we cover are within 25 miles.

Nearby places we cover from Hounslow include Isleworth (1 miles), Heston (1 miles) and Richmond (2 miles), all in England.

Your quote will name the certified system, the board thickness and the calculated U-value for your walls, not a vague 'insulation package'.

Brick slip EWI near Hounslow: Isleworth (1 mile), Heston (1 mile), Richmond (2 miles), Hanworth (3 miles), Feltham (3 miles), Southall (3 miles).

Cost in Hounslow

Guide prices for brick slip external wall insulation in Hounslow 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

Bond: Stretcher, Flemish-effect or to match
Corners: L-shaped corner slips
Insulation underneath: EPS or mineral wool, as certified

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 Hounslow

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 Hounslow: questions

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

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.

Are there grants for external wall insulation in Hounslow?

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.

Is VAT charged on brick slip external wall insulation in Hounslow?

Not on installing insulation in a home at the moment: that's zero-rated until 31 March 2027, after which the rate is due to be 5%. Work on commercial buildings is standard-rated.

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Brick slip external wall insulation in Hounslow