The concrete blocks that are used to build block foundations are hollow. When concrete blocks are stacked on top of one another, you can look down through the center of the foundation.

Reinforced Block and Concrete Walls. Block foundations use cinder blocks (8 x 8 x 16 inches) that are stacked on each other and cemented in place with mortar, forming cinder block walls.

Concrete Retaining Walls and Stairs. ... Also, do your research on what concrete foundations cost or what concrete slabs cost so you have a general idea before discussing pricing with your contractor.

It is more common than you might think for a concrete block foundation wall to bow inward, and repairing the problem is a tall order, even for an accomplished do-it-yourself homeowner.

Fixing Foundation Cracks. If small hairline cracks appear on the concrete foundation wall of your house, chiseling a small groove and filling it with hydraulic cement is a good solution, ...

A slab foundation is made of concrete that is typically 4" to 6" thick in the center. The concrete slab is often placed on a layer of sand for drainage or to act as a cushion.

The only solution is complete foundation replacement with pyrrhotite-free concrete. Depending on the size of the home, cost estimates as of 2019 ranged from $150,000 to $250,000 in the report.