The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.
Building a concrete wall on concrete slab.
Contact your local building department to see whether a permit is required and how close to the lot.
If this is the case drill through the curb and into the slab with a roto hammer every few feet.
All concrete block walls must rest on a sturdy foundation of poured concrete.
Then fill the holes in the slab with hydraulic cement.
Pouring a concrete retaining wall is not that difficult and this easy to follow how to guide will show you just what to do.
Cut a 2x12 to length or splice it with a cleat for one side of the concrete forms and nail it.
Remove the curb and clean the slab thoroughly with a wire brush.
Stake and brace the side form.
Project step by step 16 prepare the site.
A poured wall is much stronger and generally last many more years than a block wall.
Position the snap line across the marks that indicate one of the wall s ends and snap a line to lay out the.
Stretch a tape measure across the concrete slab and mark the position of the wall s ends.
If you want to build a concrete retaining wall you should consider pouring the wall rather than making it out of concrete blocks.
How to build a wall on a concrete slab step 1.