Sizing Your Downspouts – Part 2

Sizing the Gutters Multiply the drainage area by the roof-pitch factor and rainfall intensity to find out the adjusted square footage. Then use the chart below to see what size gutter you need. (If a roof’s various drainage areas call for different size gutters, go for the biggest one.) K-Style 5-inch      5,520 square feet 6-inch      7,960 square […]

Sizing Your Downspouts – Part 3

What if the runoff is off the chart for standard gutters? You have three options: 1. Get 7- or 8-inch gutters. They’ll cost more and probably require a custom order through a professional installer. 2. Increase the pitch of the gutter. The standard is about ¼ inch per 10 feet. Increasing the pitch increases a […]