"Jay Honeck" wrote in message
news:bE7Fb.604121$HS4.4424963@attbi_s01...

As a result, the place is INCREDIBLY sound-proofed. We discovered the
double-sheets of dry wall when we tried to use a standard toggle-bolt, and
the toggle wouldn't reach through to the back side of the drywall.
Everything is two layers thick.

That's one way of getting what's known as 1-hour construction (fire
resistant for an hour).

Rich S.