Bath Room, Slate Floor, Vessel Sink, Enclosed Shower, Wood Counter, Stone Slab Wall, and One Piece Toilet In the master bath, on the third floor, Greenguard-certified slate covers the walls and floor. An existing window was transitioned into a doorway. “I thought that’d be weird, a door in the shower,” David recalls. “But Alysia said it would make that particular terrace all the more private if we have to get to it through our shower!”  Photo 6 of 12 in Sustainability Guided Every Decision at this Town House Remodel in Harlem