Why Floors Lose More Heat Than You Think
Most homeowners think about loft and wall insulation first, but around 10-15% of your home's heat escapes through the floor. If you have a suspended timber floor - common in pre-1960s homes - that figure can be even higher because cold air circulates freely underneath.
If your ground floor feels cold even with the heating on, underfloor insulation is likely the missing piece.
Suspended Floors vs Solid Floors
The approach depends on your floor type:
Suspended timber floors (with a gap underneath) are the most straightforward to insulate. Rigid insulation boards or mineral wool are fitted between the joists from below, either through an access hatch or by lifting floorboards.
Solid concrete floors are trickier. Insulation needs to be laid on top, which raises the floor level slightly. This can affect door clearances and skirting boards, so it's usually done during a renovation.
Most homes we work on across Wirral and Merseyside have suspended timber floors, which makes the process simpler and less disruptive.
What Are the Savings?
According to the Energy Saving Trust, insulating a suspended timber floor in a semi-detached house saves around £165 per year. Here's how the numbers break down:
- Semi-detached house: Save approximately £165 per year
- Detached house: Save approximately £210 per year
- Mid-terrace: Save approximately £95 per year
- Installation cost: £500-1,200 depending on access and floor area
Beyond the bill savings, you'll notice an immediate comfort improvement. Rooms feel warmer at the same thermostat setting, and you may find you can turn the heating down a degree or two.
What to Expect During Installation
For a suspended floor with accessible underfloor space, the job typically takes a day. The process involves:
- Inspection of the subfloor area for damp, ventilation, and pipe runs
- Fitting insulation boards or batts between the floor joists
- Sealing gaps around pipes and edges
- Reinstating any lifted floorboards
We take care to maintain ventilation beneath the floor - this is critical to prevent damp and timber decay.
Could You Get Funding?
Underfloor insulation is covered under both the ECO4 and GBIS government grant schemes. If you're on qualifying benefits or meet the income criteria, the full cost of installation may be covered.
Check if you qualify - it takes less than a minute and there's no commitment.
Is It Right for Your Home?
Not every home needs underfloor insulation. If your ground floor already feels warm and your energy bills are reasonable, the investment may not be worthwhile. But if you have cold floors, draughts, or a pre-1960s property with a suspended timber floor, it's almost certainly worth doing.
Book a free survey and we'll tell you honestly whether underfloor insulation makes sense for your home.