Patent ID: 7536835

Claim:
A floor construction, comprising: a film-like plastic mat comprising a nub panel having support elements comprising nubs disposed in a uniform area distribution, hollow towards an underside, said nubs being adapted for supporting and projecting out beyond a top of the mat, said mat having lower contact surfaces disposed between the nubs, wherein said mat is embedded and attached, supported in a still soft, hardening thin-bed mortar layer on a sub-floor, over a full area of the mat, by the lower contact surfaces and said nubs having upper contact surfaces; channels formed between the nubs and being adapted for carrying open water; a water-permeable or vapor-permeable covering of a non-woven fabric or woven fabric disposed on top of the nubs and attached to the upper contact surfaces; lower nubs disposed between all or individual ones of the nubs that carry the covering, said lower nubs having undercuts on a lower side, for clamping thin-bed mortar that has penetrated; and ceramic tiles laid on and directly attached to the covering with a thin-bed mortar layer.