" They then sealed the outside with silicone caulk and filled the pipe with insulation" --------------- If they filled it with foam, you should be fine. If it ever needs replacing, Because it's an outside hose-bib, frost-free, to replace needs a wrench on the fitting or sweat it on with a torch. Examine the bib- silver, about 12-16", where it connects to the copper pipe or PEX tubing. Never mind, either way, if it needs swapping out you will have top access it later, at that union. Take a picture of it for future reference, if needed.
The glass batts do almost nothing against air leaks at the rim. Here is some reading for you during all your spare time, lol: http://www.finehomebuilding.com/PDF/Free/021174058.pdf http://bestdrywall.com/files/ReduceCallbacks.pdf
Floating corners, prime before and after texture, etc.: http://www.gypsum.org/pdf/GA-216-07.pdf
Doing a good job!
Be safe, Gary
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!