09:31AM | 08/25/06
Member Since: 01/09/06
3 lifetime posts
We would like to tile a second floor master bath which is now carpet with linoleum around the toilet area.

I know the linoleum will have to come up, but are there any other things I need to check for? The subfloor appears to be OSB, but I do not know what thickness.


02:07PM | 08/25/06
Member Since: 07/03/05
283 lifetime posts
OSB is acceptable as a subfloor if it is 3/4" thick and the floor joists under it are 16" on center. You could put 1/4" cement board over the OSB, then tile. There is more to it than just that but I am just giving you the basics here. If it is not OSB, but what is called particle board or flakeboard, remove it down to the joists or forget about using ceramic tile. Plywood with an exterior glue rating, other than CDX, which carries a rating for sheathing use only, not underlayment, would be best. If there is luan under the vinyl that has to come out too. Sorry to be a pain, but I will tell you the right way for it to be prepped. Post back if I have not scared you off.


02:30PM | 08/25/06
Member Since: 01/09/06
3 lifetime posts
Thanks Bob!!

No, you have not scared me off!! ;-) The actual issue is a little more complex and actually involves a complete bathroom remodel at a later date. So I will have a licensed contractor do it... I'm just not ready to do that part right now.

The wood floor for the bedroom area though we can do ... as soon as we decide what we like. We seem to be looking at laminates or wood as opposed to engineered. But I want to have some idea what the eventual elevation of the bathroom floor will be versus the bedroom and rest of the upstairs. Now you have given me enough info so I can have a reasonable idea what a contractor will do. Thanks!


11:13PM | 08/30/06
Member Since: 10/28/05
312 lifetime posts
other than what the people here have mentioned, you will want to know the manufacturer specifications for the products being installed, and most manufacturer websites will have a resource for this (installation).

The Resilient Floor Covering Institute (RFCI) has some good basic information:

and there are some other great web resources that may show subfloor requirements and consiuderations:


There are two ways to do any job. The right way and the wrong way. Do it right everytime.


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