ALL Sun-dome units are building code tested and approved. Energy efficient skylights that allow only minimal heat gain or loss thus contributing to much lower A/C heat loads & run time. High performance lighting without the use of electricity for residential and all commercial applications. A quality built unit at fair pricing and fast sevice.Correct aluminum flashings provided for your roof slope. Polycarbonate Lexan domes warranted 10 years against breakage & yellowing.We also supply custom flashings for most all metal roofing profiles for quick leakproof install. Commercial buildings and schools can save 75-90% of day time lighting costs with solar lighting tubes. Severe weather tested and leakproof even in hurricanes.