hey fellas. im tearing into my bathroom tomorrow. totally gutting to studs floor celing the works. well ok. tomorrow im doing all but floor. i want to get walls celeing and new wiring all in while leaving the stool usable untill the walls ect are done. then in going for floor probably wed-thurs after walls and celing are in. my Q is i have 1' square ceramic tile ready for floor. i have 1/2 perma board here and ready. the cement board like durock. will 3/4" plywood topped with 1/2" perma board be strong enough to keep stress cracks from happening in tile?? i have some good crossville tile from a lexus dealership that was intended for cars to drive on but over crete. whos the tile experts?? im not positive on the spacing of joists. its an old home and theres 3/4" 1x6 over them now thats comming out. but if there not within 16" i will be putting in 2x6 between them. i think there 16" though. ive only laid it on crete pad for woodstove.