Flat Roof Insulation 2026: Cut Bills & Access Grants
Flat roof insulation costs £40-£80/m² and can cut heat loss by 50%. See which grants cover it and how to get quotes. Check eligibility in 2 minutes.
INSULATION BY TYPE
insulation guidance grouped by by type so you can jump to the route that matches your circumstances.
Reviewed against primary sources
Last reviewed: 1 July 2026 · Next review due: 29 September 2026
By Type guides
Flat roof insulation costs £40-£80/m² and can cut heat loss by 50%. See which grants cover it and how to get quotes. Check eligibility in 2 minutes.
Loft insulation costs £300-£600 and can cut heating bills by 25%. ECO4 funds it free for eligible homes. We cover types, thickness, grants and DIY options.
Two minutes, a few questions about your home. We cross-reference every active government scheme and show you exactly what you qualify for.
Spray foam insulation can cause serious problems for UK homeowners. Get the facts on costs, mortgage risks and better alternatives before you commit.
Cavity wall insulation costs £400 to £800 and cuts heating bills by up to 35%. Check if your walls are suitable and which grants cover the cost.
Internal wall insulation costs £4,000 to £8,000. Cheaper than external but you lose room space. We compare both options.
External wall insulation costs £8,000 to £15,000 but ECO4 can cover the full cost. Find out if your solid-walled home qualifies.
Floor insulation costs £500 to £1,500 depending on your floor type. Suspended timber floors are cheapest. Check which grants can help.