Best way to lay granite
Thanks guys, I am fairly confident the subfloor wont rot or shift, its been down for 2 years, walked on and seems solid. I will lay another 3/8 layer of ply over the 3/4", but not sure about "Ditra", its purpose, or if there is something else that can be used in its stead. I have always done tile over the plywood base with NO membrane. Question is, what is the objective of the ditra, where is it applied? In my last house, the builder used a cement screed to level and prepare the floor, then applied the granite with thinset( I believe thats what he used its 24 years ago, and I was not paying a lot of attention at the time). This is my first time DIY setting granite, so it seems like rocket science to a dumb sparky like me. lol :confused1:
BTW we are in the city of Niagara Falls which is typically like a rain forest, located between 2 large fresh water lakes. My house is all hardwood and porcelain flooring. Consequently we need to be very mindful of the humidity levels.