Brick Slip EWI in Windsor | 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 Windsor

Windsor is in the SL4 postcode district, about 16 miles from Reading. 6 other towns we cover are within 25 miles.

From Windsor we also cover Slough (2 miles away), Egham (4 miles) and Staines (5 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 Windsor: Slough (2 miles), Egham (4 miles), Staines (5 miles), Maidenhead (6 miles), Uxbridge (7 miles), Ashford, Surrey (7 miles).

Cost in Windsor

Guide prices for brick slip external wall insulation in Windsor 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.

Whole-house prices include standard scaffolding, beads, sills and refitting services; unusual access, footpath licences and wall repairs are quoted separately.

Key facts

Bond: Stretcher, Flemish-effect or to match
Corners: L-shaped corner slips
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
Very durable, low-maintenance face

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 Windsor

Rules that apply in Windsor

Funding: 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. Grants guide
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 Windsor: questions

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

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.

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

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 Slough as well as Windsor?

Yes. From Windsor we also cover Slough, Egham and Staines, and the rest of Berkshire.

Brick slip EWI | Brick slip EWI in Berkshire | All services in Windsor

Brick slip external wall insulation in Windsor