It's important to install cement board over a subfloor in order to a get a beautiful tile floor.
Certain hardwoods require certain types of installation.
DIY Network has instructions on how to install a plywood subfloor so that it is level, well-insulated and free of annoying squeaks.
Find out what subflooring material works best with a variety of flooring, then learn how to install it.
DIYNetwork.com has photos and = step-by-step instructions on installing tongue-and-groove subflooring planks.
Host Paul Ryan and the homeowners install a radiant heat subfloor.
Amy Matthews explains how to install hardwood flooring.
How to prep the subfloor for hardwood flooring installation.
How to prep the subfloor for tile, including installing cement board.