Mandate for company / Technical and legal expertise

The words of an expert responding to Michel, owner of a house in Quebec. He had major and expensive work done by a contractor. Nevertheless, he is unhappy with it. He wonders what recourse he can claim.

The word of an responding to Nathalie, owner of a house in Laval. She discovered cracks in her foundation walls. She wants to know how to react and stop them getting worse.