Move roof water away before it finds the foundation

It depends on how much water reaches the eave, not on the size of the house. A 6-inch K-style trough carries roughly 40 percent more water than a 5-inch and normally pairs with 3x4 downspouts instead of 2x3. Large roof planes, steep pitches that speed runoff, valleys that dump two planes onto one eave, and regions with intense short-duration rainfall all argue for 6-inch. If the gutters are clean and correctly pitched but still overflow at the same spot in every heavy storm, undersizing is the likely cause.

Twice a year is the common baseline: late spring after seed pods and blossoms drop, and late fall after leaf drop. Homes under overhanging or evergreen trees often need three or four visits, because pine needles mat into a dense filter water cannot pass. Watch the practical signs rather than the calendar: water spilling over the front lip, dirt streaks on the fascia, plants growing in the trough, and downspouts that trickle instead of gushing during rain.

They reduce cleaning frequency substantially, but they do not eliminate maintenance, and any product sold as permanently maintenance-free deserves skepticism. Micro-mesh blocks the finest debris including shingle grit, though the mesh surface itself needs occasional brushing. Reverse-curve systems use surface tension to draw water around a nose, which handles leaves well but can be overwhelmed in heavy downpours or fouled by needles. Foam inserts are cheap and simple but tend to trap grit and break down under UV within a few seasons.

Four causes are common, and each has a different fix: a clog in the trough or downspout, incorrect pitch that leaves water standing mid-run instead of moving to the outlet, undersized troughs or too few downspouts that overflow only in heavy rain, and missing or misaligned drip edge that lets runoff wick back behind the gutter and down the fascia. Roughly a quarter-inch of fall per 10 feet is the usual pitch target when re-hanging a run. Isolated leaks, a few failed hangers, a sagging section or a split miter are all worth repairing on an otherwise sound system. Widespread pinholes, corrosion along the trough bottom, or a system simply undersized for the roof are better solved by replacement.

No. Ice dams form when heat escaping into the attic melts snow on the upper roof, the meltwater refreezes at the cold eave, and the resulting ridge backs water up under the shingles, which happens with or without a gutter present. The real remedies are air sealing, insulation and ventilation; heat cable in the trough and downspout only manages the symptom by keeping a drainage channel open. Gutters do take collateral damage from ice, so clear troughs, adequate downspout capacity and securely fastened hangers reduce what the ice can pull loose.