Find and repair cracks in the foundation walls and concrete slab.
The house as a system must rest on a stable, waterproof base to safeguard its durability, its energy efficiency and its occupants. A deteriorating foundation requires diligent, appropriate action to minimize the production of waste and the use of resources.
Our recommendations :
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Small cracks (narrower than a pencil) can be fixed from the inside using a waterproof grout sealer.
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Larger cracks need to be fixed from outside by excavating around the foundation walls all the way to the footing. At the same time, you should apply water resistant insulation to the outside walls to reduce heat loss.
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If the cracks are quite large or seem to move, consult a structural engineer to determine the best way to repair them.