What does cavity-wall insulation cost in 2026?
All guide prices in one place: per home, per measure and for projects — plus the factors that decide where you land in the band.
Guides
Expert guides and tips
When do you insulate the cavity walls? Construction year, season and lead time
Whether your home is a retrofit candidate depends mainly on its construction year — and the best time to ask on the heating season. The planning guide.
Cavity, floor or ground: which insulation do you choose first?
Three measures beneath and around the home, three price bands. What the choices mean for comfort, damp and order of work.
Ready for a warmer home and a lower energy bill?
Submit your free request and receive up to 3 quotes from professionals near you.
Free and without obligation · Sent straight to professionals in your region