Hi,
most places (literature) I looked, durock is recommended as a subfloor for floor tiles. I have currently 5/8" subfloor, and was gonna screw on 5/8" on top of it to get the recommended 1-1/4" for plywood subfloroor, but now i am not sure if I should skip the 2nd layer and just install duroc. The main reason to go with plywood is that I have about 5 sheets of it. The main reason for duroc, is that it is thinner, and wouldn't increase the floor height so much. Plywood is supposed to be flexing more, but if you secure it at recommended intervals with proper screws, is that still a problem? So my questions are:
1 - are both options acceptable? (1-1/4" plywood) or 5/8" plywood with duroc on top? 2 - is the durock instead of plywood going to make huge difference?The area to cover is cc. 100sqft, - 28 sqft for tub island. Does the additional flooring need to go under the tub island, or can the island rest directly on the main subfloor?
Thanks.
m.