In Seattle/DCI, mat= no inspection as they see it as a listed assembly, cable needs cover inspection. Both technically need to be installed by the electrician, but I don't think that ever happens.
Doesn't work that way. They want the electrical in so they can use their tools, and then they make installations that violate NEC and then just say: "it's your problem, because it doesn't violate plumbing or HVAC code."
I seen one guy that cut grooves into his substrate and lay the cable in that then put an epoxy coating over the entire substrate before laying tile over it. He tested integrity of cable at different stages of the install to make sure nothing happened to it. He claimed he would warranty his install and had the ability to find a break down the road and repair it without major destruction of the floor.
Any tile systems won't honor material warranty in that case
You get the other companies in the region to just say no. Throw your weight and make them do it right. Include it in your paper contract
I don't know details of his warranty, I imagine probably will repair for free for a minimum time period if deemed product or installation defect. Point was he was pretty particular about how he installed it and careful to test at different intervals of install to assure nothing was damaged, while still having opportunity to fix it if it were before finished.
How are you applying rates to the 185 man/hrs?
