Dining Room, Table, Chair, and Slate Floor Douglas fir and Alaskan cedar richly line the interior walls, and the flooring is made of Vermont slate. In the kitchen and dining area, a group of Wishbone chairs by Hans Wegner for Carl Hansen & Søn surrounds a table by local furniture maker Larry Hepler.  Photo 4 of 11 in Six Concrete Boxes Make a Jaw-Dropping Martha's Vineyard Home