Don’t believe anything he says about his experience or qualifications. This guy can’t even set a proper slope so our troughs now pool a half inch of water and ice. Hangers were missing. The longest trough bows in the middle. The downspouts were improperly attached. The mounds of silicone block contribute to drainage issues. He doesn’t return calls or emails once he’s been paid, so forget about the warranty he offers if you discover problems afterwards.