Repair

Sagging Gutters: Why Hangers Fail and How a Re-Hang Works

By Columbus Gutter Repair & Replacement · September 17, 2026 · 5 min read

Stand at the corner of the house and sight down the gutter. If it looks like a slack clothesline — high at the ends, low in the middle — it's sagging, and there's a good chance it started last February. Here's what's going on behind the fascia and what fixing it properly looks like.

Two kinds of hanger

Spike and ferrule. A 7-inch aluminum nail driven through the front lip of the gutter, through a tube (the ferrule) that keeps the gutter from crushing, and into the fascia board. Fast, cheap, and the standard on nearly every house built in Franklin County before about 2005. The problem is that it's a nail in end grain, held by friction. Every time the fascia swells in a wet spring and shrinks in a dry August, the hole gets a little bigger. Every time the gutter fills with ice and the weight pulls down, the spike backs out a sixteenth of an inch. After 20 winters it's holding by an inch of nail, and the next ice load takes it.

Hidden hanger. A bracket that clips under the front lip of the gutter and sits against the back wall, with a screw driven through the bracket and the gutter back into the rafter tail. The screw threads into solid wood, so it doesn't back out, and there's nothing visible from the ground. About $1.50 more per hanger than a spike. This has been the standard for new work for two decades, and it's what any re-hang should use.

What ice does to a gutter

Water weighs about 8.3 pounds a gallon, and a 5-inch K-style gutter holds roughly a gallon per foot when it's full. Fill a 40-foot run with ice and you've hung 330 pounds off the fascia. A spike every 30 inches — which is what most 1990s crews used — puts 20 pounds on each nail, straight down, for weeks. Then it thaws, drains, and refreezes the next night. Forty cycles later the run has a belly.

The belly makes it worse. A sagging run holds water instead of draining, so it freezes first and stays frozen longest. That's why a gutter that dropped a little in 2024 dropped a lot in 2025. It's also why the north side of the house goes first: less sun, more ice, longer.

How to tell it's the hangers

• The gutter has pulled away from the fascia at the top, showing a dark gap
• A spike head sticking out a half inch from the front lip
• Standing water or a dirt tide line in the middle of the run on a dry day
• Overflow in the middle of the run in heavy rain, not at the ends
• Mosquitoes in July

If you can push the gutter up an inch by hand and it stays there, the spikes are gone.

What a proper re-hang involves

1. Check the fascia. A screwdriver into the board at every hanger location. If it's soft, no hanger will hold; the board gets replaced first, $8–$18 a foot. On 1990s houses in Reynoldsburg and Grove City the builder often used finger-jointed pine, which rots at the joints, so this is a real check, not a formality.
2. Pull the spikes. Every one, not just the loose ones. A gutter with half spikes and half hidden hangers sags between them.
3. Find the rafter tails. Hidden hangers need to screw into framing, not just the fascia board. Rafters are typically 16 or 24 inches on center; we find them from the nail pattern on the fascia.
4. Reset the pitch. A chalk line from the high end to the outlet, falling about a quarter inch every 10 feet. On a 40-foot run that's an inch of drop end to end. Too flat and it holds water; too steep and it looks wrong from the street and the far end sits too low under the shingles.
5. Hang on hidden hangers every 24 inches — every 18 on north-facing runs, runs under a big roof area, or anything that has held ice before.
6. Seal the spike holes. Each old spike left a hole in the front lip. A dab of sealant on each, or the run will drip from twenty places in the next rain.
7. Hose test. Water in at the high end, out at the downspout, nothing standing.

What it costs

If the whole house needs a re-hang and the gutters are 25-year-old sectional, we'll say so: the re-hang labor is a big share of what a seamless replacement costs, and the replacement comes with new metal, 3x4 downspouts and a warranty. Repair vs. replacement has the comparison. One or two runs on a sound system is a plain repair, and it's one of the most satisfying ones we do — the gutter goes from a clothesline to a straight line in an hour.

Doing it yourself

On a single-story ranch with a good ladder, a homeowner can do this. Buy hidden hangers with 3-inch screws (not the 2-inch ones in the blister pack), a chalk line, a screwdriver for the fascia check, and a tube of polyurethane gutter sealant for the spike holes. Plan on an afternoon per run. Don't do it on a two-story, don't lean the ladder on the gutter, and if the fascia is soft anywhere, stop — that's a bigger job than it looks.