Such floors arrange only in cellars, sheds and an underground. At the correct device they can serve long time.
Soil floors arrange in dry places. Their device consists that well level a ground, and then condense by means of usual trambovki. The consolidation, the is stronger better as the ground becomes stronger and will collapse less at circulation. That such floors became stronger, it is possible to lay a layer of fat clay on them in the thickness of 100-200 mm and well to condense. Clay well absorbs in itself water, is condensed and as a result becomes stronger on deterioration. Besides, this layer is and some kind of a waterproofing. For maintenance of a reliable waterproofing the thickness of a layer of clay should be a minimum of 100 mm. The more fatly (more plastically) clay, the above its waterproofing properties. Lean clay becomes wet faster and faster dries up, fat - on the contrary: becomes wet more slowly and dries much longer.
Pise-walled floors arrange in such sequence. Completely cut off a vegetative layer, the basis level and well condense (ram). For giving of durability to a floor in a ground add gravel or rubble. After trambovanija prepare so-called crushed clay (very dense clay dough) with straw sechkoj, linen or konopljanoj kostroj. This clay is stacked in one or two layers in the thickness by of 60-120 mm, strongly ram, level and smooth. After that dry before full drying. If after drying cracks them close up the same clay with careful smoothing down were formed.
From above a floor it is possible to cover with a layer of an izvestkovo-clay solution in the thickness of 20-30 mm, to level it and to jam. Such floor is much stronger than the soil.
If an underground crude a clay layer from crushed clay with careful consolidation carry out in 3-4 receptions. The general thickness of such layer should be not less than 200 mm. On clay it is possible to lay a concrete layer in the thickness of 30-50 mm, well it to level, lay on it a two-three-layer waterproofing from roofing material, it is better on bitumen mastic, and from above still to lay 40-50-миллиметровый a layer of a concrete mix, to level it and to jam. It is possible to cover with a cement mortal layer (20 mm) structure 1:3 (1 ch. Cement and 3 ch. Sand). The solution needs to be levelled, jammed or smoothed down well. It will be reliable enough waterproofing, and on it it is not necessary to save.
Except gravel and rubble it is possible to use a stone, it is better plitnjak. Stones it is necessary to prepare - obkolotit their parties so that they adjoined to each other more densely. Stones can be stacked directly on the earth, zaglubljaja them in it trambovkami. (It do that stones did not fluctuate at circulation on a floor.)
Space between stones fill with crushed clay. Then a surface level the same clay and on it stack roofing felt or roofing material, and on it a concrete mix.
Sometimes arrive so. After alignment by clay lay one-two layer of roofing material (edges of cloths should be blocked not less than on 100 mm) and to it are limited. In this case it is not necessary to apply roofing felt because of a specific smell of tar which long does not disappear. However such variant is not suitable at regular circulation on a floor.