What are you trying to do?

5/8 ply is normaly glued and screwed to OBS flooring then use to adhire
tile to.
you can adhire tile to gyp-crete

Travis


wrote:
do i need to screw down 5/8 or 3/4 ply over the gyp-crete? The
gyp-crete is about 1/4 to 1/2 inch thick. The gyp-crete is laid over a
3/4 inch OSB sub floor.

thanks for any help.