Originally Posted By: ewest
What about pea gravel on the ground under the drip line ? That plus grass should do the job.

Assuming LNP is in groundhog country, use fairly large and coarse (like 1" on the minor axis and 2"-3" on the major axis) limestone all the way around the building, not just on the drip sides. Whistlepigs don't like to dig through this, and it will keep them from burrowing under the slab.

"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
[Linked Image from i.pinimg.com]