The thermal conductivity of the floor moisture-proof film is poor because common moisture-proof mats are often non-porous and covered with air-impermeable plastic film or aluminum foil reflective.
The non-porous, moisture-resistant mat covered with a breathable film has poor thermal conductivity, which prevents heat from the underfloor heating below from being transmitted to the floor to warm the room. This results in a situation in which the underfloor heating remains on for a long time, but the room is not warm. At the same time, a large amount of heat from underfloor heating is trapped below, which will cause heat accumulation and the underground temperature to be too high, which has certain hidden dangers.