Chimney Leak Repair
Chimney Flashing Replacement in Denver, CO
Chimney flashing replacement can stop water from entering where your roof meets the chimney. We inspect the flashing and surrounding area at your Denver home, then identify whether repair or replacement fits the damage.
- Open 24 hours a day, 7 days a week
- Licensed and insured
- Free in-home inspections
- Same-day service
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What Chimney Flashing Replacement Fixes
Flashing is the metal transition that helps keep water out where the chimney passes through the roof. It works with the shingles and the chimney surface to direct rain away from that joint. When flashing rusts, pulls loose, or has gaps, water can get beneath the shingles and show up as damp roof decking, ceiling stains, or moisture near the fireplace.
A replacement removes failed flashing and installs new material at the roof-to-chimney junction; a smaller defect may only need sealing or patching. We look for visible damage and signs of water entry before recommending a scope. The length of the visit depends on roof access and what the inspection reveals; repair time depends on whether the work involves a local fix or replacement. For related work, see our chimney flashing repair service.
Safe Checks Before Chimney Flashing Replacement
- Check for indoor signs of a leak — Look for water stains on ceilings or walls near the chimney, dampness around the fireplace, or a musty smell. Note whether the signs appear or worsen after rain; that detail helps connect the leak to the roof area.
- Look from the ground — From a safe spot, use binoculars or a phone camera to check for visibly bent, missing, or rusted metal around the chimney. Do not climb onto the roof or try to lift shingles, remove flashing, or apply a patch.
- Record what you can see — Take a photo from the ground and note the room or side of the chimney where moisture appears. Avoid touching loose material or walking on a wet roof; leave close inspection of the roof joint to the service visit.
Need help now? (720) 780-8924
Why Chimney Flashing Starts Leaking
Rust or corrosion
Exposure to rain and weather can corrode metal flashing. Rusted areas may no longer form a dependable barrier, especially where water can collect at the roof joint.
Gaps in the seal
Sealant around flashing can crack or separate over time. A gap gives water a path into the roof assembly, even when the metal still appears to be in place.
Loose or missing sections
A section that has lifted, shifted, or gone missing leaves the chimney-to-roof transition exposed. HomeGuide notes that rust, missing sections, and water getting under shingles are common reasons replacement is needed.
Water traveling beneath shingles
A leak may show up indoors away from the exact flashing defect because water can move beneath roofing materials. Stains near the chimney are a reason to inspect the roof junction rather than assume the visible mark is the only damaged area.
What Affects a Chimney Flashing Replacement Estimate
The cost to replace chimney flashing depends on how much metal has failed and whether water has reached nearby roofing or chimney materials. HomeGuide’s 2026 guide gives a typical US range of $300 to $1,800 for chimney flashing repair, with resealing or patching often around $200 to $500 and full replacement on a large chimney reaching $1,800 or more. These are market figures, not Denver Chimney Sweep Pros pricing.
HomeGuide also reports that labor commonly makes up 60% to 70% of flashing repair cost. The chimney flashing replacement cost for a particular home depends on the work found at inspection; there is no set replacement price listed here.
- Amount of damaged flashing — A small, accessible gap may call for a different scope than rust or missing material across several sections.
- Roof and chimney condition — The estimate can change if shingles, masonry, or the surfaces around the flashing show related damage or need attention.
- Access to the roof joint — The height and layout of the chimney and roof affect the work needed to reach and address the flashing safely.
- Repair versus replacement — A local seal or patch differs from removing failed flashing and replacing it. We check the condition before determining which scope is appropriate.
Need help now? (720) 780-8924
Frequently asked questions
Is it safe to keep using my fireplace while the chimney flashing is leaking?
A roof leak by itself does not show whether the fireplace is safe to use, but water can damage nearby masonry and interior materials. Stop using the fireplace if water is entering the firebox or you notice a change in smoke behavior, and arrange an inspection of the leak.
Do you replace chimney flashing at homes in Denver?
Yes. We travel to customers in Denver and provide chimney flashing repair, including replacement when the damage calls for it. We serve Denver and towns within 60 miles.
What should I tell you when I call about chimney flashing?
Tell us where you see water inside, when you first noticed it, and whether it appears after rain. Mention any flashing that looks rusted or loose from the ground, and share a photo if you have one; do not climb onto the roof to take it.
Can I call about chimney flashing replacement at night or on a weekend?
Yes. We are open 24/7, including nights and weekends, and offer same-day service. Call (720) 780-8924 or request service online; you can also tell us whether the leak is active and which rooms show signs of water.
Get Chimney Flashing Checked
Call (720) 780-8924 or request service to arrange a free in-home inspection in Denver.