Fill the formwork with fittings with concrete of a grade not lower than 300. To arrange the foundation, we will need several cubic meters of mortar, therefore we should either rent a concrete mixer or order ready-made concrete from the manufacturer.
It is advisable to fill in at once, in order to avoid cold bridges. Immediately after pouring, we gut the concrete (pierce with a metal bar) or treat it with a vibrating compactor to remove air.
Pouring mortar from concrete mixer
For complete drying, the strip foundation requires at least 30 days. All this time, it is advisable to cover the surface of concrete with polyethylene to slow down evaporation and more efficient strength building. When the surface under polyethylene starts to crack, it should be moistened additionally.
Preparation for laying
If you do not want to mess around with the construction of the formwork and its subsequent casting, you can build a prefabricated foundation of building blocks. (more…)