The excavation for the foundations of a single-family house should be so dug, in order not to disturb the native soil in the last stage of digging. Therefore, even when kicking mechanically, select the last layer by hand with a shovel to the desired depth. If the cohesion of the soil is disturbed, the footing should be placed on a layer of lean concrete with a thickness of approx 15-20 cm. In this case, on 6-7 parts of the sandwich, we only give one part of the cement and add the prescribed amount of water.
