Knowing whether your floor is solid or suspended affects both heat loss and your insulation options.

A suspended timber floor usually has air vents or air bricks at ground level outside, and can feel slightly springy underfoot. A solid floor, typically concrete, has no vents, feels firm, and is often tiled or screeded with no void space underneath.

Still not sure? A qualified surveyor or energy assessor can confirm your floor type during an inspection, useful to know before choosing an insulation method.