This is where insulating from the top, both for floors and roofs, can help. I used this technique for the first time more than 15 years ago, and it has performed well over the years. Instead of ...

Mineral wool beneath ground floor floorboards. For concrete floors rigid foam insulation can be used. Trapped air between carpet threads, wool fibres and within foam reduces heat loss by conduction.

When the system is switched on, the wire gets hot and it heats your floors and warms up the air in the room. It's placed on top of a layer of floor insulation, to ensure that the heat generated ...