Exterior, Wood Siding Material, Shingles Roof Material, House Building Type, Prefab Building Type, Gable RoofLine, Cabin Building Type, A-Frame RoofLine, and Glass Siding Material On the north-facing facade, it’s easy to discern where the original glass doors used to open directly to the deck. In spring of 2012, Block Island contractor John Spier replaced the entire wall of glass panels.  Best Photos from Jens Risom's Block Island Family Retreat