Group B · Cavity and internal walls
Cavity survey only
Borescope and thermal imaging to show whether a wall is empty, part-filled or failed.
Priced after survey
Cavity survey only
Every job like this is different, so we measure first and give you a fixed written quote. The price depends on:
- The area and access
- What's there now and its condition
- The system and finish you choose
No obligation — your survey confirms what suits and what it costs.
- Best for
- Buyers, landlords, EPC errors
- Guarantee or standard
- Written report
- Time on site
- Usually an hour or two.
- Typical price
- Priced after survey
What it is
What is cavity survey only?
Borescope and thermal imaging to show whether a wall is empty, part-filled or failed.
Best for: Buyers, landlords, EPC errors.
Who it suits
Which homes is cavity survey only suitable for?
Is my home suitable?
Pick your property type for a straight answer on cavity survey only.
Guidance only — every home is different, and a survey confirms what suits yours.
Houses
- Detached house
- Semi-detached house
- End-of-terrace
- Mid-terrace
- Townhouse
- Mews house and cottage
- Detached bungalow
- Semi and terraced bungalow
- Chalet and dormer bungalow
- Period home
- 1930s home
- Post-war and ex-council house
- Non-traditional / system-built
- Listed building or conservation area
- Farmhouse, barn conversion or rural home
Flats and blocks of flats
Commercial and public buildings
Usually suitable Depends — a survey confirms
Not usually suitable for 2 property types
- New build or self-build — New homes are built with insulated cavities, so there's nothing to fill.
- Park and mobile home — Park and mobile homes need specialist systems, which we arrange through a partner rather than standard measures.
Materials and brands
What we use
Borescope and thermal imaging to show whether a wall is empty, part-filled or failed.
Insulation brands we work with
- Knauf Insulation (Earthwool, Supafil blown)
- Rockwool
- Superglass
- Isover
- Kingspan
- Celotex
- Recticel
- Xtratherm
- Steico wood-fibre
- YBS and Actis multifoil
The exact system and brand for your home are confirmed in your written quote.
Heat, bills and EPC
What it does for your heat loss, bills and EPC
An empty cavity lets heat pass straight through the wall. Filling it lowers the wall's U-value considerably, so rooms hold their heat for longer and the heating runs less — often one of the best-value measures on an EPC for homes with unfilled cavities. Solid walls lose even more heat; lining them inside gives a similar improvement, room by room.
See the EPC points and savings for your home in the EPC plannerU-value before and after, typical heat and bill saving, and EPC points — worked out for your property.Price
How much does cavity survey only cost?
Priced after survey
Jobs like this vary too much for a fair online price, so we measure first and give you a fixed written quote — with no obligation.0% VAT on energy-saving materials
Insulation, solar panels, batteries and heat pumps installed in homes in Great Britain are zero-rated for VAT until 31 March 2027. Windows and doors are not included.What to expect
Time on site, disruption and approvals
Time on site
Usually an hour or two.
Disruption
Minimal — a few small drill holes, filled afterwards.
Planning and building control
None needed.
Guarantee and standard
Written report. The guarantee and certification for your job are confirmed in writing in your quote.
60-second grant check
Could a grant help pay for it?
Grant eligibility checker
About 60 seconds · plain results: likely, possibly or not eligible
Before we start
What type of property is it?
Questions
Cavity survey only: your questions answered
What does a cavity wall survey show?
Whether your cavity walls are empty, part-filled or failed. We use a borescope through a small drilled hole and thermal imaging to see the insulation and the cold spots, then write it up.
Who needs a cavity survey?
Buyers checking a house, landlords working towards EPC C, and anyone whose EPC says the walls are filled or unfilled when they're not sure it's right.
Can a cavity survey correct my EPC?
The written report gives you evidence of what's in the wall. An EPC assessor can then record the walls correctly on a new EPC.
Group B
More in cavity and internal walls
Cavity wall insulation
A borescope survey, then blown mineral wool or bonded bead injected into empty cavity walls.
Cavity wall extraction and refill
Failed, wet or slumped cavity insulation removed, wall ties checked, then refilled.
Cavity wall tie replacement
Replacing corroded wall ties, often found during cavity extraction.
Party wall cavity insulation
Filling cavity party walls to stop hidden 'party wall bypass' heat loss.
Narrow and hard-to-treat cavities
Specialist bead or wool systems for narrow, stone-faced, exposed or high-rise cavities.
Internal wall insulation (IWI)
Insulated plasterboard or stud systems fitted inside solid walls where the outside must not change.
Begin your project
Ready to talk about cavity survey only?
Tell us about your home and we'll arrange a survey, then a fixed written quote — no obligation.