Please tell me how concerned I should be over pest control people breaking tiles when tenting the house? Also, how concerned should I be over tile surface appearing cloudy as concrete bleeds?

While the Madera product holds up quite well to occasional foot traffic, our experience has been that pest control companies who utilize the tenting method of termite control, typically pay very little attention to the protection of the roof and in fact ask you to sign a waiver releasing them form any responsibility for broken tiles. I would suggest that you look for a company that features one of the newer methods of cyrogenics or orange oil for your termite treatments. Regarding your concerns about "concrete bleeds", I can only assume you are referring to the efflorescence that can sometimes occur with concrete products. While it is impossible to guarantee against efflorescence, we do apply a sealer to the surface of our tiles during the manufacturing process that is designed to limit and control this occurrence. In most cases, it never appears. Q: We are considering using your elevated battens on a tile roof in Maryland.  more