From: "Charles Spitzer" 
Newsgroups: misc.consumers.house
Subject: Re: underlayment for tile install
Date: Mon, 25 Jul 2005 09:59:47 -0700


"lls8000"  wrote in message 
news:1122306808.800315.309070@g47g2000cwa.googlegroups.com...
> I'm planning to tile a kitchen and dining room area, it's about 600
> sq'. There is currently a 1/4" plywood underlayment over particle
> board. What type of mortar and grout is best to lay over plywood?
> I am not willing to replace the plywood with a cement board.
> I've done multiple bathroom tile jobs, but this area is much larger,
> I'm more concerned about the base.
> Thanks, lls8000

what was there before? do you know how much the floor flexes? if not, then 
you can't tell if it's stable enough to tile on.