What You See: Gutters are sagging, usually at mid-point in the gutter run. They may be hanging so low that water cascades over the side rather than traveling to the downspouts.
What You Do: Install gutter hangers. If you look at your current attachment method and see spikes running through thin tubes, this is called the “spike and ferrule” method and should be replaced with gutter hangers. Attach the gutter hanger at a solid spot in the fascia and screw in firmly. Purchase metal hangers. Avoid plastic hangers, as they tend to break.
Leaking Gutter End Caps
What You Do: Install new end caps. Most end caps are either left-side or right-side, so you will need to buy the correct side. Remove the old end cap. Thoroughly scrub off any debris from around the end of the gutter. Fill inside section of end cap with exterior grade silicone sealant and press end cap onto gutter. Attach with a pop rivet tool or sheet metal screws. Clean off excess caulk with a gloved hand.
What You Experience: Your downspouts wave in the wind or bang on the side of the house when you are trying to sleep.
What You Do: Thankfully this is an easy fix. Purchase a number of downspout straps. These flat, thin strips of metal can be formed by hand into a U-shape that holds the downspout to the corner of the house. Attach straps (or use existing straps, if in good shape) to the house. Form around the downspout. Drill pilot holes into the downspout and connect with two 3/8-inch sheet metal screws per strap.