wrote in message ...
I am having the my AC system replaced and I noticed that the outside unit
sits on what seems to be a fiberglass imitation slab. Looks lik concrete
but not. I noticed my neighbor has a concrete slab under his. I am
concerned about the strength of it since it is a very large fan that is
sitting on it.

Any thoughts? Am I overly concerned?


Thanks in advance,


James

It's fine.
My most recent is a foam form.
It may even help damp the vibrations in the unit.

TB