Robert Gammon wrote:

Adam Preble wrote:
Robert Gammon wrote:
Adding drip irrigation to the perimeter of the home helps restore the
moisture to the sand under the first several inches from the edge of
the slab, in theory, reducing the stress on the slab. Slabs will
crack, windows won't open, doors won't close, cracks develop in the
sheetrock inside and I have seen cracks in the exterior masonry walls.


Do you mean by this that it's a bad idea?

Nope, folks swear by them. The edges of the sand pad that the slab
rests on dry out, even wash away from under the slab, creating a void.
The unsupported weight puts stress on the slab that will eventually
cause the cracks that I mention above.

In the new house I will begin construction of soon, the source water for
drip irrigation of the slab will be RO waste water.

Won't RO waste water create a buildup of minerals and whatnot that could
eventually cause problems since RO waste water is a concentrated
solution of everything it filtered out?

Pete C.