External Wall Insulation Cost Calculator

What do you need?

Insulate and renderExternal wall insulation with a new finish

Render onlyNew render on sound masonry

Strip and re-renderRemove failed render first

Cover pebble dashRender or insulate over it

Park home insulationThin EWI and render system

Internal wall insulationInsulate from inside, room by room

Choose an option.

What type of property?

Choose a property type.

Storeys

What are the walls made of?

Solid brickUsually pre-1920s, about 225mm thick

Solid stone

Concrete or non-traditionalNo-fines, PRC, steel-framed

Cavity wallCheck whether it can be filled first

Wall area to treat

90 m²

We estimate this from the property type. Adjust if you're only doing some walls.

Windows and doors on those walls

Which insulation board?

EPSLight and cost-effectiveCommon choice for houses

Mineral woolNon-combustible, breathable

Wood fibreBreathable, for older walls

PhenolicThinnest for the U-value

Board thickness

70mmWhere space is tight

100mmUsually reaches about 0.30 W/m²K on solid brick

130mmHigher performance

Finish

Silicone renderStays cleaner, through-coloured

Acrylic renderFlexible, wide colour range

Mineral renderPainted finish

Dry dashStone chip finish

Brick slipKeeps a brick look

Where should we send your guide price?

Property postcode *

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Name *

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Phone *

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Email (optional)

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Anything else? (optional)

We use your details only to respond to this request. See our privacy notice. The guide price isn't a quote; your fixed price follows a free survey.

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Your guide price

Free survey, fixed written price