How to Replace the Gutter Box on the Roof

Climb up to the gutter box and determine the best way to remove the old box. Loosen old screws, bolts or other attachments to release the gutter box from the wall. Support the gutters that are connected to the gutter box, if necessary, by tying them to the wall or simply screwing them in place. After all attachments have been removed, slightly shake the gutter box to remove it from the other gutters, being very careful not to lose your balance when the gutter box comes loose.

Cut the gutter box loose, if necessary, using metal shears and cutting only the gutter box if possible. Use protective gloves when cutting metal, as a slip and a cut could easily lead to a fall.

Slide the new gutter box in place where the old box sat, and attach it to the gutters using the original attachment hardware. Screw the gutter box to the old gutters then to the wall using 2-inch galvanized screws if the attachments for the new gutter box and the old gutters aren't compatible. Pass all galvanized screws through rubber washers for additional protection from water leaks at the screw attachment points.

Finish the installation by attaching the gutter box to the wall using any installation method provided or by drilling 2-inch galvanized wood screws through the gutter box and into the wall. Keep these screws higher up on the gutter box to prevent them from taking in water.