Why Should I seal cracked concrete?
Water ingress has the potential to affect the structural integrity of the reinforcing steel within a concrete substrate. A crack in a foundation will let water in which could destroy any valuables stored behind the leaking wall, floor, or ceiling. Sealing basement cracks can also prevent the growth of mold. Mold will grow with a humidity rate of 55% or higher so it is important to eliminate water ingress.
Why Did my concrete crack?
Concrete cracks can occur for a few different reasons. If the foundation was "back-filled" too soon, before the concrete has cured, it will not withstand the pressure and will result in a crack. Concrete walls shrink due to the release of water during the curing process causing possible cracks to form. Footings will also settle causing walls to crack. Cracks will commonly be found near breaks in the wall such as windows or beam pockets.
How does injection compare with excavating and sealing from the positive side?
Polyurethane injection is typically done from the negative side which allows a more time and money efficient repair. Injecting from the negative side may only require the removal of some dry-wall or a portion of the carpet which can easily be replaced at low cost. Crack repair done on the positive side requires digging a hole beside the foundation or removing walkways, flowerbeds, trees, or decks which could cost thousands of dollars.