Typically it is reckoned you lose 13-15% heat through the floor. With a suspended timber floor, it’s equally or even more important to prevent draughts coming up through the floor. We offer a solution using a breathable membrane taped at overlaps and the perimeter of the room for airtightness.
Caveat to this is most houses with suspended timber floors require pulling up the existing floor covering and boards, installing airtight membrane and insulation between the floor joists and relaying new floor covering. This is clearly very disruptive to household life and quite expensive. In the event there is a cellar below giving access, the project is much easier and more cost effective.