Brick Slip EWI in Hertford | 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 Hertford

Hertford is in the SG13 postcode district, about 17 miles from Watford. 6 other towns we cover are within 25 miles.

Nearby places we cover from Hertford include Hoddesdon (4 miles), Welwyn Garden City (6 miles) and Hatfield (7 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 Hertford: Hoddesdon (4 miles), Welwyn Garden City (6 miles), Hatfield (7 miles), Cheshunt (7 miles), Waltham Abbey (8 miles), Harlow (8 miles).

Cost in Hertford

Guide prices for brick slip external wall insulation in Hertford 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.

Brick slips, cladding and mineral wool cost more than EPS and render; the survey shows you the difference side by side.

Key facts

Finish: Real clay brick slips, 10–20mm
Bond: Stretcher, Flemish-effect or to match
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.

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Rules that apply in Hertford

Planning: 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.
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 Hertford: questions

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

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 Hertford and fixes the total in writing.

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

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 Hertford?

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

Brick slip EWI | Brick slip EWI in Hertfordshire | All services in Hertford

Brick slip external wall insulation in Hertford