Original galvanized steel rusting through
Many of these homes still have their first steel gutters. They rust at the seams and the low end, and once the pitting goes through, sealant is only a stopgap.
STL Roof Repair repairs and replaces gutters, downspouts, fascia and drip edge on Florissant, Missouri homes, and installs seamless aluminum gutters with leaf guards sized for heavy north county tree cover. John Beal Roofing has been family-run since 1947, is BBB A+ rated and an Owens Corning Platinum Preferred Contractor; inspections and written quotes are free. Call (314) 429-6000 and a live dispatcher will answer.
The houses that define Florissant went up in the postwar building boom: brick and frame ranches, split-levels, and one-and-a-half stories on generous lots, most of them with shallow roof pitches and wide overhangs. Shallow pitch is comfortable to work on and fine in ordinary weather, but it changes the physics at the eave. Water leaves a steep roof with enough momentum to clear a compromised trough; water leaving a low-slope roof drifts off the edge slowly and clings, which means a gutter that is sagging, sealed badly, or mounted too low will pull that water backward into the fascia and the sheathing instead of shedding it.
Layer the tree canopy on top of that. North county has decades-old oaks, sweetgums and maples hanging over these roofs. Sweetgum balls and oak tassels are the worst thing that can happen to a trough because they do not wash through — they lodge at the outlet and build a dam that holds water permanently. A trough that stays wet corrodes from the inside on original galvanized steel, and rots the fascia behind it on anything.
Many of these homes still have their first steel gutters. They rust at the seams and the low end, and once the pitting goes through, sealant is only a stopgap.
Long shallow eaves with loose hangers develop a belly in the middle. Water stands there year-round and works its way behind the trough.
Coarse seed debris packs the outlet and holds the whole run full of water, which is what corrodes steel and rots wood.
On some re-hangs the trough ended up too low, so water shoots past it in a downpour and nobody realizes the gutter was never in the path.
A clogged trough on a shallow roof is a perfect ice dam site. Meltwater backs under the first shingle course and shows up on the ceiling inside.
Short downspouts on a ranch put water right at the foundation. On a house with no basement that shows up as slab and crawlspace moisture instead.

We look at the drip edge, the first shingle course and the sheathing along the eave, because a bad gutter has usually already been wetting them.
Soft fascia is documented with photos and replaced before anything is hung. Hanging new aluminum on rotted wood is wasted money.
Screwed hidden hangers on correct fall keep a long shallow run from bellying again.
Coarse screens do not stop sweetgum and oak debris. We match the guard to the trees actually over your roof.
There is a maintenance reality on these houses that we would rather say out loud than sell around. No gutter guard makes a roof under sixty-year-old hardwoods maintenance free. A good one turns a twice-a-year climb into an occasional check, and that is worth real money on a two-story split-level with an awkward rear elevation. Anybody promising you a system you will never touch again has not worked under a Florissant oak.
Storm damage is the other reason people call us here. North county takes the same squall lines the rest of the metro does, and hail that bruises shingles dents troughs and knocks downspout straps loose on the same afternoon. If a storm moved through your subdivision, get the gutters documented with the roof rather than separately. Our insurance division handles adjuster meetings, and gutter damage left out of the original scope of loss is one of the most common supplements we file. Coverage always depends on your policy and what the adjuster verifies — we document, we do not promise.
Sometimes, if the corrosion is limited to a joint or two and the rest of the trough still holds its shape. Once the rust has pitted through the bottom of the run, patching becomes a seasonal chore rather than a fix, and seamless aluminum is the better spend. A technician photographs the inside of the trough so you can see the actual condition instead of taking our word for it.
Both play a part. A blocked trough gives meltwater somewhere to pool and refreeze at the eave, and a shallow roof with an under-ventilated attic keeps producing that meltwater. Cleaning and correcting the gutter helps, but if you get ice every winter we will also look at the ventilation and the eave detail, because that is where the real cause usually sits.
No, and we will not tell you otherwise. Under mature oaks and sweetgums a good guard keeps the trough flowing and cuts your maintenance down substantially, but fine debris still collects on top of any guard and needs an occasional rinse. The honest version is much less climbing, not zero.
Usually it means water has been getting behind the trough, either because the gutter is mounted below the drip line or because there is no proper drip edge at the eave. Replacing the gutter alone would not fix that. We correct the flashing detail at the same time, which is the difference between a repair that holds and one that repeats.
Typically within the same week for a complimentary roof-and-gutter check, and immediately if water is coming into the house. Our phone at (314) 429-6000 is answered by a live dispatcher twenty-four hours a day, seven days a week.
Tell us what is going on and we will call to schedule. Inspections are free.
On a low-pitch ranch, a sagging trough puts water right back under the shingle edge. The inspection is free and you keep the photographs.