We've been remodeling bathrooms in Mt Prospect, IL for two decades. That means we know how to sequence the work. The heating mat goes in at exactly the right stage of the tile installation, not as an afterthought. We test continuity before any tile is set so you're not cracking up a finished floor six months later to fix a bad connection.
A lot of homeowners who call us for a full bathroom remodel add heated floors once they see how little it adds to the overall project. When the subfloor is already exposed and the tile work is already planned, it's the smartest time to do it. We handle the thermostat wiring, the mat layout, and the tile finish as one coordinated job, not three separate trades stepping on each other.