Brick Slip EWI in County Londonderry

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.

Homes across County Londonderry

Derry's historic centre and its surroundings, Coleraine, and homes along an exposed north coast.

County Londonderry has some of the UK's more exposed locations for wind-driven rain, which shapes the render and detailing we specify.

We cover 3 towns in County Londonderry for brick slip external wall insulation, listed below, and the villages around them.

Prices in County Londonderry

Guide prices for brick slip external wall insulation in County Londonderry 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.

Specification

Finish: Real clay brick slips, 10–20mm
Bond: Stretcher, Flemish-effect or to match
Corners: L-shaped corner slips
Insulation underneath: EPS or mineral wool, as certified
Weight: Heavier than render; anchor pattern checked
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
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.

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.

Other services in County Londonderry

Towns in County Londonderry

The rules in Northern Ireland

Planning: Planning in Northern Ireland is handled by the 11 councils. Changes that alter a house's appearance, work on flats, listed buildings and conservation areas should be checked with the council planning office before work is booked.
Building regulations: EWI is controlled under the Building Regulations (Northern Ireland) 2012, with energy standards in Technical Booklet F and fire in Technical Booklet E, so you need building control approval from your council.
Fire safety: Technical Booklet E sets the fire performance of external walls by building height and boundary distance; non-combustible insulation is used on taller buildings and in the positions the guidance requires.
Funding: The Affordable Warmth Scheme, delivered through councils for the Housing Executive, helps owner-occupiers and private tenants with household income under £23,000, with grants up to £10,000 where solid wall insulation is needed. Approval must be in writing before work starts, and the council arranges the work through its own process. 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.

Questions about brick slip external wall insulation

Can brick slips go on mineral wool?

Yes, where the system holder certifies the combination. Mineral wool with brick slips is used on low-rise blocks.

How long do brick slips take?

Longer than render: allow extra days per elevation for laying and pointing.

Can I do the front in slips and the rest in render?

Yes. It is a common way to keep the street face in brick and control the cost.

Brick slip EWI | All services in County Londonderry

Brick slip external wall insulation in County Londonderry