External wall insulation services
Choose by insulation board, by finish, or by the kind of home. Every page has guide prices, the specification and the questions people ask.
EWI systems
Insulation boards, fixings and render systems
EWI installation
The full system: boards, fixings, mesh, render and every detail around it.
From £109 per m²
EPS insulated render
Expanded polystyrene boards: the most widely used, best-value EWI board.
From £109 per m²
Mineral wool EWI
Non-combustible stone wool slabs for blocks, close boundaries and breathable walls.
From £129 per m²
Phenolic EWI
The thinnest board for the U-value, where every millimetre counts.
From £135 per m²
Wood fibre EWI
A breathable, natural board for stone, timber-frame and older solid walls.
From £155 per m²
Brick slip EWI
Insulate the wall and keep a real brick face, bonded and pointed over the system.
From £185 per m²
Insulated cladding
Insulation behind a ventilated cladding: timber-effect, composite or fibre cement.
From £145 per m²
Insulating lime render
A breathable thermal render for heritage and stone walls where boards don't suit.
From £95 per m²Render finishes
The surface you see, and how it weathers
Silicone render finish
The most popular EWI topcoat: through-coloured, water-repellent and low-maintenance.
From £109 per m²
Mineral & silicate render
Vapour-open mineral and silicone-silicate finishes for breathable systems.
From £125 per m²
Pebbledash & dry dash EWI
A dry dash finish over insulation, so a pebbledashed house still looks pebbledashed.
From £115 per m²By type of home
How the job changes from house to house
Solid wall insulation
For pre-1930s homes with no cavity, where most heat is lost through the walls.
From £109 per m²
Non-traditional houses
System-built concrete and steel-framed homes, where EWI is often the only realistic route.
From £115 per m²
Bungalow EWI
Single-storey jobs: lighter scaffolding, quicker programmes, four elevations.
From £10,995 a house
Terraced house EWI
Mid and end terraces: neat stops at party walls, narrow passages, neighbour details.
From £8,595 a house
Semi-detached EWI
Front, side and rear: the classic 1930s semi and post-war semis.
From £13,995 a house
Detached house EWI
Four elevations, the largest wall area and the biggest saving.
From £20,495 a house
Park home insulation
Thin, lightweight insulated render systems for residential park homes.
From £6,795 a homeBlocks, landlords & housing
Rented homes, flats and housing programmes
Flats & low-rise blocks
Whole-block projects for freeholders, managing agents and residents' companies.
From £129 per m²
Social housing EWI
Street and estate programmes for councils, housing associations and their contractors.
From £99 per m²
EWI for landlords
Improve the EPC and comfort of solid-walled rental homes with tenants in place.
From £8,595 a houseRepairs & surveys
Surveys, repairs and putting failed work right
EWI repairs
Cracks, impact holes, failed sealant, algae and damaged beads put right.
From £395 a repair
Failed EWI remediation
Investigating, stripping and reinstating EWI that lets water in or causes damp.
From £135 per m²
EWI surveys
Free survey for installation quotes; paid condition reports for existing EWI.
Free survey for quotesNot sure which you need?
Book a free survey and we'll recommend a system for your walls.