Durock is fine but just to complicate the issue look through the
Schluter site. Ditra is perhaps a better material if you anticipate
floor movement. I've used both in my home and have been happy with
both. Home Depot has some Schluter products and can order the others.

Don't use construction adhesive to put Durock down, use a modified
thinset mortar.

Boden

http://www.schluter.com/english/prod...toverview.html



Mak Wilson wrote:
I plan to use Durock backer board as underlayment for tile (in
conjunction with plywood). My preference is to use 1/2". However, I
downloaded Durock's install guide and got confused. It sounded as if
they made two kinds, one for walls and one specifically for
underlayment. They call the 1/2" and 5/8" board their "Standard Board"
while the "Underlayment" version comes only in 5/16". Is there
anything that makes the 1/2" board unsuitable for underlayment or is
this just a matter of advertising the 5/16" as underlayment because
it's thinner and will not raise the floor as much?

Secondly, convention suggests a gap of 1/8" between boards. However I
can't seem to get a straight answer regarding the space that should be
left between the backer board and the wall. 1/8"? 1/4"?

Help is a appreciated!