All-Pro Gutter Installation Team
25+ years of gutter expertise in Houston, TX • Published 2026-04-10
A leaking gutter is more than a nuisance — it's an active threat to your home. Water escaping from gutters saturates fascia boards, erodes landscaping, and pools around your foundation. Houston's expansive clay soil makes foundation damage from gutter leaks especially costly, with repairs averaging $5,000–$30,000.
The good news: most gutter leaks have a straightforward cause and fix. Here are the five most common culprits and what to do about each.
1. Failed Joint Sealant
The problem: On sectional gutters, the sealant at seams breaks down over 5–10 years, creating drip points every 10 feet. Even seamless gutters have joints at corners and downspout connections that can fail.
The fix: Clean the joint thoroughly with a wire brush and rubbing alcohol. Apply a bead of gutter-specific sealant (not silicone caulk — use polyurethane or tripolymer sealant rated for aluminum). Smooth with a wet finger. Allow 24 hours to cure before rain.
When to call a pro: If you have more than 3–4 failing joints, the gutters may be at end of life. A professional can assess whether repair or replacement is the better investment.
2. Cracks and Holes
The problem: Aluminum gutters can develop pinholes from corrosion, impact damage, or standing water. Steel gutters develop rust-through holes.
The fix: For holes under 1/4 inch, clean the area, apply roofing cement, and press aluminum flashing tape over it. For larger holes, cut a patch from matching gutter material, apply sealant around the edges, and rivet or screw it into place.
When to call a pro: Multiple holes along a run, or holes in 6-inch gutters that carry high volumes during Houston storms, should be professionally assessed.
3. Sagging Sections
The problem: Gutters sag when hangers loosen, fascia rots, or debris weight pulls the gutter away from the house. Sagging creates low spots where water pools instead of flowing to downspouts.
The fix: If the fascia is solid, add or replace gutter hangers (hidden hangers are best — we install them every 24 inches). If the fascia is soft or spongy, the fascia board needs repair before the gutter can be properly reattached.
When to call a pro: If you see daylight between the gutter and fascia, or the gutter has pulled away more than an inch, don't risk a ladder DIY — the structural attachment needs professional evaluation.
4. Improper Pitch
The problem: Gutters need a slight slope (1/16 inch per foot minimum) toward downspouts. If the pitch is wrong — too flat, wrong direction, or inconsistent — water pools in sections and eventually overflows. Learn more about proper gutter pitch.
The fix: This requires re-hanging the gutter at the correct slope. Measure from the high point to the downspout: for a 30-foot run, the downspout end should be about 2 inches lower than the far end.
When to call a pro: Re-pitching gutters correctly requires removing and re-hanging entire runs. This is best done professionally to ensure proper water flow.
5. Clogged Downspouts
The problem: A clog in the downspout causes water to back up into the gutter and overflow at the seams. This is the most common cause of what looks like a gutter leak but is actually a drainage blockage.
The fix: Disconnect the downspout at the elbow. Use a plumber's snake or garden hose to clear the clog. For underground downspout drainage, you may need to flush from both ends.
Prevention: Gutter guards prevent 95–99% of downspout clogs. For homes without guards, flush downspouts during your regular gutter cleaning.
When to Stop Patching and Replace
If you're fixing leaks every season, it's time to consider replacement. Multiple repairs eventually cost more than new seamless gutters, which eliminate most leak points entirely. See our complete cost guide for Houston pricing.
Contact All-Pro for a free inspection — we'll tell you honestly whether a repair or replacement makes more sense for your situation.