Exterior, Sawtooth RoofLine, Tiny Home Building Type, Metal Roof Material, and Concrete Siding Material The couple finished the exterior siding with shingles made of Hardie board and painted a deep purple. "We wanted an exterior cladding that was durable, low-maintenance, and relatively DIY-friendly,  Best Photos from Budget Breakdown: A Creative Couple in Minneapolis Build a Multipurpose Backyard Studio For $18K