We are using quality 3/4 plywood as the base - can we glue the tiles directly to this wood or does there need to be something between the wood and the glue/mortar?
it wud be good if u use cement boards! if u stick it to wood directly: 1) if termites come there will be a problem, 2) wood will eventually become weak!! there was a renovation at my house and cement boards were used on top of wood!! :)
You can use two layers of 3/4 going cross grain to the bottom but there still is the possibility that the wood will swell and move if you don t glue and screw it together well. Its better to use a 1/2 cement board. And still use thin set between the 2 layers and nail ( galvanized roofing nails) or screw it well. Any questions you can e mail me through my avatar and check my qualifications there. GL
