I installed this myself by carefully following the supplied instructions. I'd say my floor area shape was more complex than most but instructions were good & exact. I used the hot glue on my plywood subfloor. I buried the heat mat under one coat of mortar and the orange tile seperation poly mat (made by others). Then layed my floor tile over that the next day. Even though only half the floor is heated there are no cracks in any of the grout joints. Warmly was quick to answer any questions I had. Good Customer Svc. for sure.
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