Contractor Talk - Professional Construction and Remodeling Forum banner
1 - 1 of 9 Posts

· Registered
971 Posts
16" oc joist spacing Minimum subfloor requirements for Ditra under porcelain/ceramic is 5/8" nom. Under stone is 3/4" nom. plus another layer 3/8" nom.

Cement board will not add strength to the floor assembly, but rather weakens it with the extra weight. Most cement boards require minimum 5/8" nom. subfloor as well.
1 - 1 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.