Where’s the job?

Scope of Works

• Survey the property to confirm suitability for cavity wall insulation

• Drill access holes at regular intervals across external walls

• Inject insulation material (e.g., mineral wool, polystyrene beads, or foam) into cavity

• Fill and seal drill holes to restore external wall finish

• Conduct a thermal imaging or borescope check (if applicable) to confirm full coverage

Typical Cost

Time on Site

Cavity wall insulation jobs typically take 3–6 hours, depending on the size of the property, type of insulation used, and weather conditions.

Questions to Ask Your Installer

• Are you certified and approved to install cavity wall insulation?

• What insulation material do you recommend for my wall type and why?

• Do you offer a warranty or guarantee for your work?

How to Avoid Surprises

• Confirm that your walls are suitable (unfilled cavities, no structural defects or damp)

• Request a detailed written quote covering survey, materials, labour and post-installation checks

• Check for government grants or local schemes that may subsidise insulation costs