1. An electric underfloor heating system (also known as a dry system) radiates heat through a series of wires in the floor. It’s either a mat, which is best for large spaces because it can be rolled out to cover an entire floor, or a cable/loose-fit system (individual wires). This is a flexible solution for smaller and awkwardly shaped rooms, such as bathrooms, where there’s no need to heat the floor under the basin and bath. Heating mats should be laid on a finished subfloor, such as plywood, and encased in a flexible levelling compound or flexible tile adhesive, while cable/loose-fit systems should be encased in the finishing screed of a concrete floor.