When Alex or Bruce leave the island, closing up shop is as simple as sliding panels of corrugated metal into place to protect the windows. http://www.dwell.com/green/slideshow/green-cottage-getaway-maine#14
266 Bay Walk by Horace Gifford (1968). Gifford wrote of the house, also encapsulating his work as an architect, that "The outstanding feature of the house is that we did not diminish the beauty of the site in any way. Glass tends not to enclose—that's why we used so much of it."