The answer to 'best downspouts' is that the best downspouts are those that effectively channel rainwater away from your home's foundation. Properly installed and sized downspouts are essential for protecting your home from water damage, basement flooding, and soil erosion around the home.
The most common and effective downspout materials are aluminum, vinyl, and galvanized steel. These materials are durable, rust-resistant, and come in a variety of colors to complement your home's exterior. Downspouts should be at least 2x2 inches in diameter, and larger for homes with extensive roof area. They should extend at least 6 feet away from the home's foundation and have splash blocks or underground drainage to direct water far from the home.