What is the difference between a 2×3 downspout and a 3×4 downspout?
A 2×3 downspout is 2 inches thick and 3 inches wide. A 3×4 downspout is 3 inches thick and 4 inches wide. A 3×4 downspout allows more water to escape from the gutter than a 2×3 downspout. It requires a larger hole to be cut in the gutter and that lets more water and small debris pass through the downspout. A 3×4 downspout is recommended anywhere there is a large amount of water coming from the roofline.
