Spike-and-ferrule failure
A spike is a long nail through the front of the gutter, through a sleeve, into the fascia. Every thermal cycle works it a fraction of an inch, and after thirty years it's proud of the gutter face by an inch.
You can see them from the ground on a lot of Ballwin, Crestwood and Affton homes. Once they've backed out, tapping them back in doesn't hold — the hole is oversized.
The fix is hidden hangers screwed into fresh wood every two feet.
Soft fascia
If the wood behind the gutter is rotted, no fastener will hold. This is the failure people repair three times before someone tells them the real cause.
Press the board under the gutter. Give means the board has to be replaced before anything is rehung.
Weight
Water weighs about eight pounds a gallon. A 40-foot run of 5-inch gutter holding water and wet leaves down its length is carrying hundreds of pounds it was never designed to hold.
Ice makes it worse. A winter with a few freeze-thaw cycles on a full gutter is how a marginal hanger becomes a failed one.
Why it matters beyond looks
A sagging gutter holds water in the low spot permanently. That accelerates corrosion, breeds mosquitoes, and adds standing weight that pulls the next hanger.
It also means the pitch is wrong everywhere, so the whole run is working badly, not just the visible dip.
Questions people ask
Can a sagging gutter be fixed or does it need replacing?
Usually fixed, by rehanging on hidden hangers into solid fascia. Replacement is only needed if the trough itself is deformed or worn.
Why do gutter spikes back out?
Thermal expansion works them loose over years, and once the hole is enlarged they can't be re-driven successfully.
How far apart should gutter hangers be?
Two feet. Three feet is common in cheap installs and it's the reason a lot of newer gutter sags.
Is a sagging gutter urgent?
Not an emergency, but it holds standing water and gets worse. It's a this-season repair, not a someday one.
Free estimate
We measure, we look at the fascia, and you get a number in writing.
Talk to a real St. Louis gutter company
Third generation, family-run since 1947. Somebody picks up, day or night.