Strip foundation is great for a porch

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In this case, holes are made in the concrete foundation of the house, in places where the porch adjoins it, using a drill, into which reinforcement pins are driven. The longitudinal threads of the frame are subsequently welded or attached with knitting wire to these pins.

If the soil on the site is quite weak or saturated with moisture, then it is advisable to leave a so-called "expansion joint" between the base of the house and the foundation for the porch - i.e. simply separate them. The fact is that due to the difference in the mass of the porch and the house, their settlement and rise during the freezing and thawing cycle of heaving soil will be different. And this, in turn, can lead to both cracking of the concrete base and deformation of the porch itself.


After marking and stretching the center line, you russia mobile database start to construct a trench for installing the formwork. Since the porch is a fairly light structure, a depth of 30-40 cm will be sufficient on solid soils. The trench is dug along the perimeter of the future porch along the center line so that after installing the formwork in it, the internal width is at least 25-30 cm.

This thickness of concrete strip is quite enough for the weight of light wooden structures. If the soil is dense enough and does not crumble, then it is possible to do without installing formwork inside the trench. It will be enough to knock together the formwork on the surface, depending on the height of the pouring of the foundation for the porch.

A reinforcement frame must be installed inside the formwork and trench. Corrugated reinforcement with a diameter of 8-12 mm, both steel and plastic, is quite suitable for this. The frame can be made by welding and installed in the trench, or assembled directly inside the formwork using knitting wire. To do this, rods are driven into the bottom of the trench, and horizontal reinforcement threads are attached to them. After this, concrete is poured into the formwork.

It is advisable to fill the foundation in one go. If this is impossible for some reason, then a 45-degree slope should be made at the point where the filling is interrupted. This will prevent cracks from appearing in this place during the drying and shrinkage of the concrete.