Brick Slip EWI in Portsmouth | 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 Portsmouth

Portsmouth is in the PO1 postcode district, about 15 miles from Southampton. 6 other towns we cover are within 25 miles.

We arrange surveys in Portsmouth (PO1) at a time that suits you, and cover neighbouring Gosport, Fareham and Ryde too.

We photograph every hidden layer as it goes on, so you have a record of what's behind the finish on your Portsmouth home.

Brick slip EWI near Portsmouth: Gosport (2 miles), Fareham (5 miles), Ryde (6 miles), Havant (6 miles), Waterlooville (6 miles), Cowes (9 miles).

Cost in Portsmouth

Guide prices for brick slip external wall insulation in Portsmouth 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

Finish: Real clay brick slips, 10–20mm
Corners: L-shaped corner slips
Weight: Heavier than render; anchor pattern checked

Why choose it

Keeps a real brick appearance
Very durable, low-maintenance face
Can mix with render on side and rear walls to manage cost

Why is a brick slip finish more expensive?

Slips are a material cost on their own, they are laid by hand course by course, corners need special pieces, and the whole face is pointed. Expect brick slip finishes to cost noticeably more per square metre than render.

More services in Portsmouth

Rules that apply in Portsmouth

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 Portsmouth: questions

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

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 Portsmouth and fixes the total in writing.

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

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.

Which EWI system suits homes in Portsmouth?

It depends on the walls. Most brick houses in Portsmouth 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 Portsmouth