"lls8000" wrote in message
oups.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.