Strip foundation

Strip foundation usually built in two ways. In the first case (shallow foundation), trenches are dug in the ground with a bucket dredger or manually. Then roofing material (or other waterproofing material) is laid on the side walls of the trench. After that, sand and gravel are poured into the bottom of the trench, and then concrete is poured into the trench. In this version, a small amount of soil from the part of the underground, provided for the engineering equipment, is removed manually.

The second method of making a strip foundation is more familiar. When a basement is provided in the house, they first dig a pit, then formwork of the required configuration is made, into which concrete is poured. A dump of sand and gravel is made under the foundation. The foundation protrudes at least 30 cm above the ground. It is necessary to perform high-quality external waterproofing and internal vapor barrier (in the case of a heated basement). The above-ground part and the upper layer of the underground part can be made with brickwork, stone or concrete blocks. Outside, the foundation must be carefully insulated.

The use of a strip foundation is advisable if there is a basement in the house (deep foundation).

Advantages. Can be made without heavy construction equipment (shallow foundation).
disadvantages. A deep strip foundation is more expensive. It requires waterproofing, insulation, increased attention to the elimination of cold bridges. Requires protection from radon.

Remarks. To increase the thermal protection of the strip foundation of the eco-house, horizontal thermal insulation is performed along the perimeter of the house. Sometimes the foundation is made hollow, and the voids are filled with insulation.