Footings should be a minimum of twice the width of the concrete block (i.e., a typical 8x8x16 block would require a 16-inch wide footing) and extend below the frost line.
How Deep Should a Footing Be for a Block Wall?
Building a block wall requires a solid footing to support the weight of the wall and ensure it will remain standing for years.
But how deep should a footing be for a block wall? The answer will depend on several factors, including the type of soil, the size of the wall, and the climate.
The first step in determining the proper depth of the footing for a block wall is to consider the type of soil it will be built on.
Clay soils require deeper footings than sandy soils, as the soil‘s ability to hold the block wall in place decreases as the soil‘s particle size decreases.
In addition, soil with a high water content can reduce the strength of a block wall footing, so the footing must be deeper in order to support the wall.
The size of the wall also plays a role in determining the correct footing depth. Generally speaking, the larger the wall, the deeper the footing must be.
This is because the larger the wall, the greater the pressure it will be putting on the soil, which in turn requires a deeper footing to support it.
Finally, the climate of the area where the wall is being constructed should be taken into consideration. If the area experiences extremes of temperature, such as hot summers and cold winters,