Free survey · Fixed written price · UK-wideCall free 0800 088 6248

Solid and internal wall insulation

EWI and render survey

An EWI survey measures your walls, checks their construction and condition, and records everything that affects the insulation and render — damp, ground levels, eaves, windows and services — so the price you get is fixed in writing before any work starts.

  • Measured wall areas and elevations
  • Wall type, condition and any damp identified
  • Eaves, cills, reveals and services recorded
  • Planning and Building Regulations position checked
  • System, thickness and finish recommended
  • Fixed written price — no obligation
A surveyor in a hi-vis vest measuring a pebble-dashed semi-detached house with a laser measure and tablet

Free survey for survey and quote

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What happens during the survey?

We measure each elevation, photograph the details that affect the job, check the wall construction and look for damp, cracking and loose render. Ground levels and the damp-proof course are recorded so the system starts in the right place. Eaves depth, window cills, flues, meters, soil pipes, satellite dishes and lights are all noted because each one needs a detail.

Typical build-up

Typical build-up for EWI and render surveyCross-section from inside (left) to outside (right): Existing wall, Adhesive, EPS insulation board, Base coat + glass-fibre mesh, Silicone render finish.INSIDEOUTSIDE1. Existing wall2. Adhesive3. EPS insulation board4. Base coat + glass-fibre mesh5. Silicone render finish
Survey length
Typically 45–90 minutes for a house
You receive
Written quote and specification
Covers
Walls, details, services, approvals
Cost
Free for installation quotes
Condition reports
Paid, priced up front

What do I get afterwards?

A written quote listing the system (board, thickness and finish), the detailing included, scaffolding, any repairs found, exclusions, the VAT treatment and the expected programme. Where planning or building control is needed, the quote says so and who handles it.

Is the survey really free?

For installation quotes, yes, with no obligation. Detailed condition reports on existing render or EWI — for example for a purchase, a dispute or a warranty claim — are a separate paid service, priced up front.

EWI and render survey prices

EWI and render survey guide prices
ItemGuide priceNotes
Survey and written quote for installationFreeNo obligation
Condition report on existing render or EWIFrom £295inc VATWritten report with photos
Measured drawings for planningFrom £355inc VATWhere needed

Guide prices are confirmed by a fixed written quote after a free survey. Prices include VAT at 20%.

How it works

  1. Tell us about the property

    Use the quote tool or form, or call free on 0800 088 6248.

  2. Free survey

    We measure the walls, check condition and confirm planning and building control.

  3. Fixed written quote

    The system, details, access, exclusions and VAT, in writing. Anything hidden is priced and agreed before extra work.

  4. Installation and handover

    Work planned around the weather, then inspected and documented.

EWI and render survey: questions

How long does the survey take?

Usually 45–90 minutes for a house. Blocks and commercial buildings take longer.

Do I need to be home?

Ideally yes, so we can check inside for damp and look at window reveals, but rear and side access is the main thing.

Can you quote from photos?

We can give a guide figure from photos and measurements, but a fixed price needs a visit.

How long is the quote valid?

The quote states its validity period, usually 30 days, because material prices change.

Reviewed 19 October 2026 by the Render and Insulation technical team.

Get a fixed price for survey and quote

Tell us about the walls and we will arrange a survey. No obligation, no work until the price is agreed in writing.

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