It does come in 1/4" thickness, but it will probably flex too much. Even a
miniscule amount of flex will crack the grout.

The thinnest I have read you can go for floor thickness is 1/2" durarock
attached to 5/8" plywood using thinset and the proper type and number of
screws.

When I worked for a construction company I put down a dozen or more floors
and always had to come back and try to fix loose tiles and cracked grout on
floors where the sub floor wasn't thick enough.



"Oppie" wrote in message
...
I'm remodeling a very small bathroom (about 5'x7'). For now, I'll just be
laying linoleum, but I would like to lay some concrete board so that I can
at a later date tile the room. The flooring right now (under the existing
linoleum) is a 1/2" thick plywood. It seems very solid and doesn't seem to
buckle. This house was built some 40 years ago and the wood looks in
excellent condition.

Anyway, how THIN of a layer of concrete board can I get away with? I don't
want to raise the final level of the floor any more than necessary. Would
1/4" concrete be okay for a small job like this?

Thanks!

--
Oppie the Bear
aka TOJ (The Other John)

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