A stain spreading across the ceiling near your fireplace is never just a stain. It means water has already found a way past your roof — and in Covina, where a chimney can go eight dry months without being tested and then get hammered by the first November storm, that first leak usually arrives without warning.
FlashGuard Chimney Flashing Repair fixes leaking chimneys across Covina and the surrounding San Gabriel Valley. We don't guess. We find where the water is actually getting in, show you what we found, and repair it so the same leak doesn't come back with the next rain.
Here's the thing most homeowners don't learn until they've paid for the wrong repair: the spot where water shows up inside is rarely where it gets in. Water enters at the roofline, runs along rafters and decking, and drips wherever it happens to stop. In our experience, a "chimney leak" in a Covina home traces back to one of six sources.
Got an active drip right now? Call (626) 479-5904 — we offer 24/7 emergency chimney leak repair across Covina.
Every leak we repair in Covina traces back to one of these. Knowing which one you have is the difference between a lasting repair and money spent on the wrong fix.
The metal flashing that seals the joint where your chimney meets the roof is the single most common leak source. Sealant bakes and cracks under San Gabriel Valley sun, step flashing works loose as the house settles, and counter flashing pulls out of aging mortar joints. If your leak only shows up when it rains — and stops when it doesn't — flashing is the first place we look.
The concrete crown on top of your chimney sheds water off the stack. Hairline cracks let water soak straight into the masonry. After a few seasons, that shows up as stains on the ceiling below or damp brick inside the attic.
No cap means rain falls directly into the flue. You'll see water in the firebox, rust on the damper, and a musty smell that never quite leaves.
Mortar is softer than brick, and it's supposed to be — but after a few decades it crumbles and recedes, leaving open channels for wind-driven rain. Homes built in the 1950s and 60s, which make up a big share of Covina Park, Cypress Park, and the older streets off Citrus Avenue, are right in that window now.
Brick and mortar absorb water like a sponge. During a multi-day atmospheric river storm, a saturated chimney can weep moisture through to the inside even with perfect flashing.
Wide chimneys on steeper roofs need a cricket — a small peaked diverter on the uphill side — to split water flow. Without one, water pools against the flashing until it finds a seam.
Our chimney leak detection process starts on the roof, not in your living room. We inspect the flashing seams, the counter flashing reglet, the crown, the cap, and the mortar joints, then check the attic side to trace the water's path. If it isn't obvious, we water-test section by section until the leak reproduces. You get a plain explanation and photos of what failed — before any repair is quoted.
No work starts before you approve it. You'll know exactly what we're fixing, what materials we're using, and what it costs. Curious how the numbers break down before you call? Our guide to chimney leak repair costs in Covina lays out typical ranges by repair type.
Depending on the source, that may mean resealing and re-securing flashing, cutting in new counter flashing, rebuilding a cracked crown, waterproofing the masonry with a vapor-permeable sealer, tuckpointing failed mortar, or installing a cap or cricket. Most single-source leak repairs are finished in one visit.
Where practical, we water-test the repair so you don't have to wait for the next storm to find out whether it worked.
Our chimney leak detection process starts on the roof, not in your living room. We inspect the flashing seams, the counter flashing reglet, the crown, the cap, and the mortar joints, then check the attic side to trace the water's path. If it isn't obvious, we water-test section by section until the leak reproduces. You get a plain explanation and photos of what failed — before any repair is quoted.
Honest ranges, based on the repair — the exact price is always set after inspection:
| Repair | Typical cost |
|---|---|
| Flashing reseal / minor flashing repair | $250–$500 |
| Partial flashing replacement | $500–$1,000 |
| Full flashing replacement | $900–$1,800+ |
| Crown repair (seal or rebuild) | $300–$1,500 |
| Tuckpointing (localized) | $500–$1,500 |
A $300 reseal is the right fix when the metal is sound and only the sealant has failed. It is the wrong fix — and wasted money — when the flashing itself has rusted through. That's why we inspect first. See the full breakdown in our Covina chimney flashing cost guide.
Homeowners reported water stains on their living room ceiling, indicating a potential chimney leak.
After: After our inspection, we repaired the flashing, eliminating the leak and preventing further damage.
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A cracked crown was allowing water to seep into the chimney structure, risking significant damage.
After: We rebuilt the crown, ensuring a watertight seal that prevents future leaks.
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Deteriorating mortar joints were compromising the chimney's structural integrity.
After: After tuckpointing, the chimney was restored, preventing leaks and enhancing stability.
Book this service →Our chimney leak repair services solve a variety of common issues faced by homeowners in Covina.
Ask a pro →We identify and repair leaking flashing to prevent water intrusion and protect your home.
Our team repairs or rebuilds crowns to ensure a watertight seal.
We provide tuckpointing services to restore mortar joints and prevent leaks.
We're based at 440 N Barranca Ave, Covina, CA 91723, minutes from most of the homes we service:
We also handle leak repairs in West Covina, Azusa, Glendora, and Baldwin Park. Not sure you're in range? Call with your ZIP code — 91722, 91723, and 91724 are our home turf — and we'll tell you straight.
Water damage compounds quietly. A leak that costs a few hundred dollars to fix this month can mean rotted decking, soaked insulation, and mold remediation by spring. If you've noticed a ceiling stain, a damp smell near the fireplace, rust streaks on the chimney, or water in the firebox after rain, it's worth one inspection to know where you stand.
Call FlashGuard Chimney Flashing Repair at (626) 479-5904 to schedule your leak repair, or request an appointment online. We serve Covina from our shop on N Barranca Ave — [ADD: CA license #] — and we stand behind our repairs in writing.
Most chimney leak repairs in Covina fall between $250 and $1,500, depending on the source. A flashing reseal is usually $250–$500, partial flashing replacement $500–$1,000, and a full flashing replacement typically $900–$1,800 or more. Crown work and tuckpointing are priced by scope. Every price is confirmed in writing after an inspection — ranges are estimates, not quotes.
Light rain may not produce enough water to overwhelm a small gap, and it often evaporates before penetrating. Heavy or wind-driven rain pushes water sideways into failed sealant, lifted flashing, and open mortar joints. A leak that appears only in big storms almost always points to flashing or mortar — not the roof surface itself.
Often, yes. Repeat leaks usually mean the visible spot was sealed while the true entry point — frequently the counter flashing or a hidden step-flashing seam — was missed. We water-test in sections until we reproduce the leak, then repair the actual source.
Most single-source repairs — resealing, a flashing section, a cap — are completed in a single visit of a few hours. Crown rebuilds and full flashing replacements can take a full day. We'll tell you the timeline before work starts.
We can perform temporary emergency measures during a storm to limit damage, and complete the permanent repair once the roof is dry and safe to work on. Call (626) 479-5904 any time — we're available 24/7 for emergencies.
All of Covina — Downtown, Charter Oak, Covina Heights, Covina Park, and Cypress Park — plus West Covina, Azusa, Glendora, and Baldwin Park, from our location at 440 N Barranca Ave, Covina, CA 91723.
Don't wait for a small leak to become rotted decking and mold. Contact us for leak repair that fixes the source — and is tested before we leave.
Get a Free Quote (626) 4795904 →We invite you to reach out for any questions or to schedule a service. Our team is available Monday to Friday, ready to respond quickly.