we are doing a house reno right now, taking out all carpet and putting in hardwood there and taking out all lino and putting in tile there.
We have a base of plywood and then K3 on that, which is a particle board. The hardwood guy says you can put hardwood over K3 or particle boards, cause they will both expand and contract at the same rate basically, with heat, moisture in the air etc.
But, the tile guy says you absolutely can not put tile over particle board. It is too subject to expansion and contraction. Not unless you want your grout to pop out!!! So, sigh, for that portion of the house, we have to rip out all the K3 and put down plywood and then he can put down the tile. Wont be pretty for awhile, have around 1400 square feet of K3 to rip out
((