Proudly Made in the USA Royal Brand Solid Cellular PVC Vinyl - expertly crafted using a CNC Router, for a precision cut every time. May be painted with exterior acrylic latex paint. Premium Pure Copper Roof - Heavy 24 gauge genuine copper that naturally weathers to a rich patina. Superior Strength - Roof has reinforced rafters. Windowed mid-section equipped with interior vinyl framing brace. 18 gauge Heavy Duty staples used instead of nails for increased strength and durability. Size Guide - Square size measured at your structure's roofline. When calculating the size of your cupola, use our builder's rule of thumb: 1.5 inches of cupola width for every foot of unbroken roofline. Roof pitch - Cupolas fit up to a 10/12 pitch (most roofs). The pitch is cut into the cupola base at the job site for a more precise fit. If your pitch is steeper, please contact us for a taller base.