The reliable way to hire a pro

We will be knocking down some old shower tile in my kids’ bathroom and putting up new tile. Not sure yet if concrete or drywall is behind it. Our home is early 2000s in Durham Region. Have seen two options of what is usually behind old shower tile: either drywall with a metal mesh, or concrete. Looking for suggestions on how to approach waterproofing it if it’s drywall. Have heard positive things about installing Go Board. However, if it’s concrete, I’ll leave intact. In the case of concrete, is further waterproofing needed? Thanks to any experts with suggestions.

How long does it take to do level an unfinished basement and install vinyl flooring?

Bought a house in Richmond BC and found out that pergola although looked nice, is incorrectly attached to the house and is dragging down the fascia board it is attached to and there is a rot in several places. The wood is starting to crack. There are visible attempts to fix it in several spots but as the underlying problem is structural, they failed. How to proceed? What kind of contractor I would be looking for, how is this type of work called?