Exterior, House Building Type, Wood Siding Material, Flat RoofLine, and Shed RoofLine "The geometry of the roof transforms from a typical pitched gable on the short northeast end of the façade, to a flat roof on the opposite end of the southwest facade," says cofounder Javier Ampuero Ernst. "This transition creates a dynamic arrangement of folding roof planes."  Best Photos from A Black Timber Home in Chile Echoes Local Volcanic Stone