JR - yeah, the double doors were a feature of this builder, as a way in for a riding mower. This is actually a large 2½-car garage, 28' deep for the "2" and about 15' for the "½", although I have parked a small pickup and two sedans in there, albeit tightly. Now there is so much junk in there (lumber piles, cutoffs, tools, etc.) that I can barely get two cars and the tractor in.

Dave, I don't really know about the vapor barrier configuration, but I do know the outside has a tyvek wrap and the inside (at least in the attic) is lined with 1" foamboard with the aluminum side "in". BTW, that aluminum skin played havoc with TV reception (came with an amplified attic antenna) before we installed FIOS.

Besides the heights, one more reason I would not tackle a HardieLap job myself is the number of non-square cuts needed. That is a heck of a lot of mitered ends!

All - I guess my next step is to contact some people for bids for total replacement versus fix-up. One plus of total replacement is that I can relocate those @%%#!! high spotlights on the ends down to a reasonable height.