Walter R. wrote:
I am having a contractor tile my outdoor patio. It is partly covered and
partly subject to rain and sun (Southern California, no freezing). The size
is 11x 40 feet. Tile size is 18" square.

The tile will be installed on a concrete slab, using thinset. Should the
contractor make some provision for heat expansion/contraction? Silicone
grout? Control joints? He says, no provision for expansion is necessary.

Thanks

--
Walter
www.rationality.net
-

Think about it for a couple seconds. Expansion _relative_to_ what_? And
how
much, proportionately? They're on masonry, remember, and both tiles
and masonry are very conductive.


Concrete slab, though, will crack. And if such crack is under center of
tile(s)
I'd expect tile(s) to crack too, depending on the exact type and extent
of deformation.

You hired an expert. I'd listen to him, and get assurances in writing.

HTH,
J