Smart Home Energy 
If you've got a large gap-filling or cavity insulation job — under floors, round pipes, in a roof space — this 12-can bundle gives you professional coverage at DIY cost, but you'll need a steady hand and Building Regs awareness for structural work.
Problem it solves
Reduces heat loss and drafts by filling gaps and cavities with expanding foam insulation, cutting heating costs and improving thermal comfort.
Who it's for
DIY-confident homeowners tackling large insulation projects like under floors, in roof spaces, or around pipes; also tradespeople doing professional retrofit work.
Why we recommend
Good solution to gap-filling or cavity insulation jobs, if you have access.
Savings
- Typical annual saving
- £150–£400/year depending on area treated and existing heat loss
- Payback period
- Under 1 year for large-scale application
