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Cement block walls once cracked will move in and out during the year due to seasonal changes in moisture levels in the soil. Often over the years this crack tends to get larger as the wall slowly begins moving inward. I think you need to look into stabilizing this wall and looking into the cause of cracking. Grading maybe?
In the case of concrete block which is cracked...the best permanent repair from the inside which can be effected without excavation would be utilizing Fortress carbon fiber grid straps. Installed from floor to ceiling, these straps are permanently attached to the wall with a special structural epoxy. The straps will not stretch and they will not come off the wall. Once tuckpointed, the wall cannot move in or outward. These carbon straps can also be anchored at the bottom block for additional shear resistance with Fortress carbon fiber staples. In case there are no top wall connections installed by the home builder top wall necktie anchors are also available.
If it is a solid concrete wall the cracks can be cleaned out and then injected with a polyurethane foam, then the wall crack should be stabilized with staples.
This is a proven cutting edge repair method...now in the marketplace for over 1 years.