Insulation Type
Underfloor Insulation
Stop heat escaping through your floors with underfloor insulation — particularly effective in older homes, fully funded through government grants.
What Is Underfloor Insulation?
Underfloor insulation prevents heat from escaping downwards through the ground floor of your home. It is particularly effective in older properties with suspended timber floors, where cold air circulates freely beneath the floorboards.
Insulation can be fitted from below (through a cellar or crawl space) or from above by lifting floorboards. For solid concrete floors, rigid insulation boards can be laid on top. The result is a noticeably warmer floor surface and reduced energy consumption.
Up to 15%
Heat Loss Prevented
£60–£120
Annual Savings
1–2 days
Install Time
£0
Cost to You
Check If You Qualify for Free Underfloor Insulation
Enter your postcode to start your free eligibility check.
Benefits of Underfloor Insulation
Here's what you can expect when underfloor insulation is installed in your home through a government grant scheme.
How It Works
Check eligibility
Enter your postcode to see if you qualify for free underfloor insulation through ECO4 or HUG2.
Home survey
A surveyor assesses your floor type, access below the floor, and overall suitability for insulation.
Installation
Insulation is fitted between joists from below or above, depending on access. The process typically takes 1–2 days.
Start saving
Your ground floor feels noticeably warmer, with fewer draughts and improved energy efficiency throughout the home.
Register Your Interest
Leave your details and we'll contact you about free underfloor insulation.
Frequently Asked Questions
Other Insulation Types
Loft Insulation
Reduce heat loss through your roof by up to 25% — one of the simplest and most cost-effective energy efficiency measures.
Cavity Wall Insulation
Fill the gap between inner and outer walls to reduce heat loss by up to 35% — fully funded through government grants.
Room-in-Roof Insulation
Insulate converted loft spaces and dormer rooms to prevent up to 30% of heat escaping through the roof structure.
Check Your Underfloor Insulation Eligibility
Enter your postcode to find out if you qualify for free insulation through government grants.