Gutters and Downspouts
Updated: Mar 10
Permission Granted By InterNACHI
Drainage without gutters and downspouts can damage the exterior wall with overflow. If the roof has no gutters and downspouts or interior downspouts, the inspector should carefully check the exterior walls for signs of water damage.
Most functional gutters have a minimum ratio of gutter depth to gutter width of 3:4. The front edge is typically ½-inch lower than the back edge. Four inches is considered the minimum width except on the roofs of canopies and small porches. If there is a screen or similar device to prevent anything but water from flowing into the gutter, its performance during a rainstorm should be checked to be sure water can actually enter the gutter.