The gutters went on the house last spring. By the second heavy rain, you noticed a faint stain on the fascia. After last week's thunderstorm, water tracked down behind the gutter onto the wall, and now there's a soft spot in the wood when you press a screwdriver against it.

You called the installer. He said it's "just settling" or "the gutter expanding in the heat" and offered to come out and re-caulk it under warranty.



That's not the fix. The leak on your installation is one of six common installation mistakes — and re-caulking the same mistake produces the same leak two years later. The contractor knows. The contractor's hoping you don't.

Six installation mistakes. Six different leak signatures. Six different fixes. Knowing which one is causing your leak decides whether you're spending $200 or $5,000 to make it stop.

A properly installed gutter system on your home in Greater New Orleans doesn't leak in year 1 or year 2. The aluminum on your gutters doesn't fail. The premium baked-enamel finishes are rated under AAMA 2604/2605 for 20-30 year color and chalk performance. Polyether sealants hold their bond for two decades. Stainless steel doesn't deplete.

When a one-year-old gutter on your home leaks, the problem is the installation—not the materials. The components on your installation weren't joined, sized, or sealed correctly.

That's actually good news. Material failure means full replacement. Installation mistakes on your gutters are diagnosable, and most are fixable for less than the cost of new gutters — if you catch them early.

The scope of work for your installation ranges from $200 (one corner reseal) to $4,000+ (full system replacement). The earlier you catch the mistake, the smaller the scope on your end.

Mistake 1 — Miter Strip Corners with Silicone Caulk

The most common single cause of year-1 to year-3 leaks. The installation used miter strips (a separate aluminum strip screwed across the corner joint) and silicone caulk to seal the gaps. In Louisiana’s heat, silicone caulk fails at year 2-4. When the caulk fails, your corner leaks.

Visible signature on your gutter: drip at the corner during light rain, white chalking on the gutter face below the corner, water staining on the wall below the corner after every storm.



The contractor's "free re-seal" puts more silicone on the same miter strip. Same chemistry, same Louisiana heat, same failure timeline. You'll be having this conversation again in another 2-4 years.

The actual fix on your installation: replace that gutter run with hand-mitered corners and Clemlink-Duralink polyether sealant. Hand-mitered corners last 25+ years; miter strips fail at 3-4.

TIP: If your contractor offers to "re-seal" miter-strip corners for free under warranty, ask whether they'll convert to hand-mitered corners instead. The honest answer is usually no — it's more labor than re-caulking. The conversion is the durable fix; the re-caulk is the warranty patch.

Mistake 2 — Wrong Pitch (Standing Water in the Gutter)

Gutters need 1/4 inch of drop per 10 linear feet of run, sloping toward the downspout. Visually, that's nearly flat — but measurably sloped enough that water moves.



When the installation is truly level (or back-pitched away from the downspout), water doesn't drain. It sits in the low spots between rains. A wet gutter floor accelerates sealant degradation, breeds mosquitoes, and overloads the corners during storms because the gutter never empties between rain events.

Verify by checking your gutter 4+ days after a rain. The working gutter is dry by then. Standing water in your gutters means the wrong pitch. You can also place a 4-foot carpenter's level on the gutter — the bubble should show a slight slope toward your downspout, not centered.

The fix on your installation: re-hang the affected gutter sections at the correct pitch. Existing hangers come out, new hangers go in at the right elevation drop, and the gutter sits at the proper slope. Done well, the cost is in the few hundred per run.

Mistake 3 — Hanger Spacing Wider Than 30 Inches

Industry code minimum is 36-inch hanger spacing. Joe's standard installation uses a 30-inch maximum. The difference matters in Louisiana’s climate because each hanger takes a smaller share of the cycling load when more hangers are installed.

A new gutter installed at 36-inch spacing or wider often shows sag between hangers within the first year — visible as a downward dip in the gutter line and a gap between the gutter and the fascia. The sag itself doesn't always leak immediately, but the differential creates pooling at low spots, which adds to sealant stress and causes the corner failures of Mistake.



The fix for your installation: add hangers to bring spacing down to 30 inches max, then re-tension the run. Sometimes the existing fasteners need replacement during this work because they've already been stressed.

TIP: Count hangers from the ground. A 25-foot run at 30-inch spacing has 11 hangers. The same run at 36-inch spacing has 9. Wider than 36 inches, and you can see the sag without measuring.

Mistake 4 — Sheet Metal Screws Without Neoprene Washers

Each screw that fastens your gutter to your fascia passes through aluminum at multiple points. Without a neoprene washer compressed under the screw head, each screw hole is an entry point for water.



In year 1, the entry is small. By year 2-3, you'll see rust streaks below each fastener position on your gutter and slow drips at the screw holes during heavy rain. The fastener integrity itself is fine; the seal at the fastener is the failure point.

Visual check: climb a step ladder, look down into the gutter at the fastener heads. You should see a black or gray rubber washer compressed under each screw head. Bare metal screws on your gutters indicate the wrong fastener spec.

The fix on your installation: replace fasteners with stainless steel neoprene-washer screws. The work is straightforward — the new screws back out the old ones, and the washers seal the existing holes. Cost is in the few hundred per run, depending on fastener count.

Mistake 5 — Drip Edge Not Integrated with Gutter Back Wall

This is the installation mistake most homeowners can't see from the ground. The drip edge is the metal flashing at the roofline where the shingles meet the gutter. Done right on your installation, the drip edge extends down and over the back wall of the gutter, so water running off your roof drops into the gutter, not behind it.



When the drip edge isn't integrated correctly — too short, wrong angle, or installed before the gutter was hung — water runs off the roof, behind the gutter back wall, and onto the fascia. The gutter looks fine; the fascia rots invisibly.

Visual signature: dark staining on the fascia behind or below the gutter that appears in heavy rain and persists. From inside an attic or with a flashlight aimed up at the soffit, you might see water staining on the underside of the roof deck near the eave.

The fix involves pulling the gutter, reinstalling the drip edge correctly, and re-hanging the gutter. This is more invasive than the other fixes — but it's also the installation mistake that causes the most expensive secondary damage if left.

WARNING: Drip edge mistakes can produce fascia rot in 6-12 months in Louisiana’s climate, even when the gutter itself looks fine. Once the fascia rots, you're looking at fascia replacement ($1,500-5,000+) plus possible soffit and rafter-tail damage on top of the gutter rework. Catch this one fast — water staining behind the gutter that persists is the warning sign.

Mistake 6 — Downspout Outlet Not Sealed at Gutter Floor

The downspout outlet is the round or rectangular hole cut in the gutter floor where the downspout connects. The cutout's perimeter needs to be sealed where the downspout flange meets the gutter.



When the seal isn't done at installation on your gutters — or is done with silicone caulk that fails fast — water exits through the gap around the perimeter. Visible signature: a drip directly under the gutter at the downspout position, sometimes mistaken for the downspout itself leaking.

The fix on your installation is straightforward: pull the downspout connection, clean the gutter floor and downspout flange, apply polyether sealant around the perimeter, and reinstall.

New gutters leaking before year 2 means an installation mistake, not a material failure. Joe's Gutters & Patios diagnoses installation mistakes on existing systems and provides written estimates for repair vs replacement. Free assessment. Call (504) 813-4293.

Diagnosing Your Specific Leak

The diagnostic walk-through takes 15 minutes:

• Walk your gutter perimeter during or just after a rain event. Note where the water is appearing on your installation — at corners, mid-span, behind the gutter, or under the gutter at downspouts.

• For each leak location on your gutters, match the symptom to the table above. Most homeowners find their leak fits one of the six mistakes cleanly. A few fit two — a wrong-pitch run with sealant stress on the corners, for example, where mistakes 1 and 2 compound.

• Photograph each leak point during rain. Pictures are what your contractor will need to scope the repair and what you'll need if the warranty negotiation gets contested.
  

Why "Free Re-Seal" Isn't Always a Real Fix

When your contractor offers to come back and re-seal under warranty, the question is what they're re-sealing and with what.

A polyether re-seal on a hand-mitered corner is a real fix. The original metal joint is sound; the polyether is just the secondary protection that needs refreshing.



A silicone re-seal on a miter-strip corner is a warranty visit, not a fix. The miter strip depends entirely on caulk for its seal, and the silicone will fail again at the next 2-4-year cycle. The contractor knows this. They're trading a few hours of labor under warranty for a customer callback you'll forget about once it's outside the warranty window.

Ask: "What sealant are you using?" If the answer isn't a polyether brand name (Clemlink-Duralink, Sika SikaFlex, or OSI Quad Max polyether), the re-seal is a temporary patch.

TIP: When the contractor is on-site for the re-seal, photograph the corner before and after. Note the date, the product they used, and the warranty terms in writing. If the same corner leaks again in 2-4 years, you'll need this documentation to argue against "wear and tear" denials.

When the Contractor Won't Come Back

Workmanship warranties on gutter installs typically run 1-2 years on labor. Year-1 leaks on your install are inside the warranty window. Year-2 leaks are at the boundary. Year-3+ leaks are usually outside warranty entirely.

Contractor responsiveness varies. Some come back without question; others find reasons to push the leak outside warranty terms ("the storm last month was unusual," "you didn't maintain the gutter," "we didn't install that section"). Documentation is what makes the warranty enforceable.

If your original contractor refuses to fix a clear installation mistake within the warranty period, your options are:

• A complaint with the Louisiana State Licensing Board for Contractors (lslbc.gov). The LSLBC investigates licensed contractor complaints and can compel resolution.
• A complaint with the Louisiana Attorney General's Consumer Protection Division for documented contractor abandonment or fraud.
• A different contractor who can scope the repair and bill it. You may have grounds to recover the cost from the original contractor in small claims court.
  

TIP: For year-7+ systems, get two estimates: one for targeted repair, one for full replacement. The numbers are usually within 30-50% of each other once fascia repair and labor for partial component replacement are included. Replacement at year 8 often looks like the cheaper option once everything is itemized.

Frequently Asked Questions

A Leaking New Gutter Is a Diagnosis, Not a Mystery

Six installation mistakes. Predictable causes. Fixable with the right diagnosis.



Walk your gutter during rain. Match what you see to the six symptoms on your installation. Photograph everything. Then decide whether the original contractor gets your warranty call or whether a fresh contractor diagnoses the problem.

The cost of catching the installation mistake in year 1 is small. The cost of letting it run to year 4 — fascia repair, soffit work, possible rafter damage — runs into thousands. The diagnosis is the gate. Make sure the fix matches the actual mistake, not the contractor's preferred warranty patch.

A leaking new gutter is an installation diagnosis problem first, repair problem second. Joe's Gutters & Patios — hand-mitered corners, 30-inch hanger spacing, neoprene washer screws, polyether sealant. The installation spec that doesn't leak. Call 504-813-4293 — a same-day call-back, no trip fee, Louisiana contractor license #CL.65670.