Heating of external surfaces (surfaces in contact with open air) consists in covering pipes with a layer of ground (e.g. a sand layer) and next laying over it a target layer, which can be e.g. cobble stones, sports field turf or any other material according to the surface use. Such a construction prevents excessive snow cover and ice cover in winter and ensures safety of usage.
Heating of external surfaces is now more and more common for one-family houses (garage drives/ramps, side walks, external stairs and terraces) and in public houses. The fact of having this kind of a system in sports investments like stadiums for warming football field turfs becomes a standard nowadays.