Exterior, House Building Type, Cabin Building Type, Metal Siding Material, Metal Roof Material, Shed RoofLine, and Farmhouse Building Type The 925-square-foot house Maggie Treanor calls home blends into the landscape somewhat; with a galvanized steel shed roof and siding, it looks like a high-design little brother to the barns on the surrounding farms.  Photo 1 of 16 in A Sustainably Built Home in Rural Ontario