A Guide to Underfloor Insulation (UFI)
Insulation that can be fitted under suspended timber or solid floors to reduce the amount of heat lost through the floor.
Main benefits
- Reduces heat loss through the floor.
- Significantly reduces draughts coming up through suspended timber floors.
- Makes the floor warmer to sit and walk on.
- Can be incorporated with underfloor heating.
Things to consider
- In houses with solid floors, the floors may need to be raised slightly, which can impact the skirting boards and doors.
- In suspended timber floors, the installer needs to take care around the ends of joists to ensure that they don’t attract moisture (by being colder than before).
- In either solid floors or suspended timber floors, the installer needs to take care around the junctions with the wall insulation to ensure a robust retrofit and minimise thermal bridges.
