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Apply approximately 15ft of 8" to 10" wide carbon fibre material over the crack to help stabilize from future movement.
This crawlspace was really nasty when we were called to fix it. Cold, wet, mouldy and lots of rotting wood. Our CleanSpace liner, SmartSump de-watering, and open cell spray foam insulation was the solution.
When we repair crawlspaces with our encapsulation and spray foam system, we always recommend that mechanical ventilation be installed. This can consist of something as simple as a small fan, a dehumidifier, or ideally, a Heat Recovery Ventilator. Island Basement Systems installs basic HRV systems, and we prefer to see them used as they provide whole home fresh-air exchange which significantly improves your indoor air quality (IAQ).