ROOFING
How gutters actually fail
Sagging from hanger failure or standing water
A gutter full of wet leaves is carrying real weight — water alone runs a bit over eight pounds per gallon, and a plugged trough holds gallons per foot. That load pulls fasteners out of soft fascia, and once one hanger goes the two beside it carry double and follow. The sag then creates a low spot that holds more water, which accelerates everything. Re-hanging with hidden hangers at tighter spacing usually solves it, provided the fascia behind is still sound.
Separated seams, corners, and end caps
Every joint in a gutter is sealed, not welded, and sealant is a consumable. Aluminum moves measurably with temperature swings, and across a Texas summer a long run cycles far enough to work a bead loose. Miters at inside corners are the worst offenders because they take concentrated flow from two planes. The repair is to cut out the old bead completely, clean the metal back to bright, and reseal with a gutter-grade sealant — smearing new sealant over failed sealant buys a season at most.
Pinhole corrosion and rust-through
On steel gutters, rust starts at cut edges, scratches, and anywhere debris holds moisture against the metal. It appears first as brown streaking on the outside face and then as a line of pinholes along the bottom of the trough. On aluminum, galvanic corrosion shows up where a dissimilar metal is in contact — a steel screw through aluminum, or copper flashing draining onto an aluminum gutter. A few isolated pinholes can be patched. A trough that is perforated along its length is done.
Downspout and outlet blockage
Blockages form at the transitions — at the outlet drop, at the upper elbow, and at the lower elbow above the discharge. A gutter that overflows only at one spot while the rest of the run stays dry is telling you the outlet below it is plugged, not that the gutter is undersized. Clearing and flushing confirms it in minutes.
Ice and freeze damage
The southern states get fewer freeze events than the north, but they get them, and a hard freeze on a full gutter does real damage. Water expands as it freezes, which splits seams and deforms end caps, and ice held in the trough adds weight in exactly the way that pulls hangers. Damage from a February freeze frequently is not noticed until the first spring rain overflows the run.
Fascia rot behind the gutter
This is the failure that turns a small repair into a real one. Water running behind the trough — because the gutter apron is missing, because the back lip sits too low relative to the shingle edge, or because the trough has overflowed for years — soaks the fascia board from behind. The board looks painted and fine from the ground while the back face is soft. Hanging new gutter on rotten fascia guarantees a callback, so the wood gets replaced first.
Improper pitch and standing water
If water sits in the trough a day after the rain stops, the run has lost its fall. That is either a settled hanger, a sag between hangers, or a system that was hung level to begin with. Correcting pitch to roughly a quarter inch per ten feet toward the outlet is often a matter of resetting a handful of hangers.
Impact damage
Ladders set against the front lip crush the profile and break the pitch. Falling limbs tear runs loose at the hanger line. Hail dents the trough face without necessarily compromising function, though it often accompanies roof damage worth documenting for a claim.