On Mon, 28 Mar 2011 09:08:46 -0700 (PDT), Joe wrote:

On Mar 28, 10:56*am, bob wrote:
carpet installers are here and ripping up old stuff. flooring is
particle board thick enough to be very rigid

can i put durorock membrane on this for tile?

http://www.durocktilemembrane.com/pr...embrane-9.aspx

Particle board in a wet environment like a bathroom is far from
ideal. Rip it out and ask a pro what would be better. Or band-aid it
like you suggested and live with the inevitable do-over.
Given your situation I would simply Durock over plywood on the joists
and not worry about it for years. That and a Schlutter membrane should
be very long lasting for tile work in a bath.

right now there's tile in the bathroom...ugly stuff which is why i
want to get rid of it. but it looks like the floor's stable enough for
tile. want to make sure it stays that way!

thanks much

Joe.