PART OF THIS MASSIVE UNDERTAKING involved totally reconfiguring the upstairs. I was a little nervous about removing a bedroom we already had over the living room, but the architect was right: The flow was lousy, and we had all that space over the great room to expand the second floor. We kept the one bath (actually converting it to a Jack-and-Jill bath that reminds me of “The Brady Bunch,” only much, much nicer) and added another down the hall, with the third bedroom. It's kind of a suite, but that bathroom also serves the new game room, where we've got a drop-down projector and big screen for watching movies as a family. I kind of like having the entertainment area upstairs; we can throw parties and fundraisers on the lower level while the kids hang out upstairs. We also moved the laundry to a new space at the top of the back stairs, which end at the garage. So much for us catching the kids sneaking in after curfew!

COOL FEATURES VANISHING GLASS WALL

The NanaWall enables full-height, full-open access to the upstairs deck from the sitting room by folding like an accordion along a hidden overhead track and a slim floor track that meets ADA-threshold requirements. Closed, it's weathertight and energy-efficient; open, it creates an unobstructed view and a generous connection with the outdoor spaces —most evident in the great room, where three, 10-foot NanaWalls open to the outdoor living area. Nana Wall Systems. Circle no. 161.