Brick slip external wall insulation in Derry
Looking for brick slip external wall insulation in Derry? We survey homes across County Londonderry and the BT48 postcode district, measure every wall and give you a fixed price in writing before any work is booked.
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 Derry
Derry is in the BT48 postcode district. 2 other towns we cover are within 25 miles.
County Londonderry has some of the UK's more exposed locations for wind-driven rain, which shapes the render and detailing we specify.
Brick slip EWI near Derry: Strabane (14 miles), Limavady (15 miles).
Cost in Derry
Guide prices for brick slip external wall insulation in Derry 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
- 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
- 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.
More services in Derry
- EPS insulated render
- Wood fibre EWI
- Insulating lime render
- Silicone render finish
- Pebbledash & dry dash EWI
- Solid wall insulation
- Terraced house EWI
- Social housing EWI
Rules that apply in Derry
- 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.
Brick slip EWI in Derry: questions
Do I need planning permission for external wall insulation in Derry?
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.
Do you cover Strabane as well as Derry?
Yes. From Derry we also cover Strabane and Limavady, and the rest of County Londonderry.
Which EWI system suits homes in Derry?
It depends on the walls. Most brick houses in Derry 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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