Insulating underneath flooring and signs

Flooring can account for around 10-20% of heat loss or heat gain,^[1] so insulating it is a lesser priority than insulating your ceiling.

Suspended flooring often has electrical cables underneath it, so you or your installer should take care when installing insulation there (particularly if you’re using reflective foil insulation).

If you cover your windows with advertising signs, you should also ensure that you put insulation between the sign and the window (or behind the window). This will help to stop the sun’s radiant heat from entering the building via your sign.