Chimney Flashing Repair Cost: $300–$1,800 (Average $1,000) in 2026
Author: CostGuideHQ Editorial·✓ Fact-checked·Updated July 2026·7 min read·4 sources·US national averages, USD Quick answerQuick answer: Chimney flashing repair costs $300 to $1,800 for most homes, averaging around $1,000. A minor patch or reseal runs $200 to $300, step flashing replacement costs $400 to $600, and counter/continuous flashing runs $800 to $1,000. Chimney size, material, and labor drive the rest.
- ✓Chimney flashing repair typically costs $300 to $1,800, averaging around $1,000 for a full professional job (Forbes Home, HomeGuide).
- ✓A minor patch or reseal can run as low as $200 to $300, while full replacement on a large chimney reaches $500 to $1,800 (Fixr, Bob Vila, HomeGuide).
- ✓Step flashing replacement costs $400 to $600, versus $800 to $1,000 for continuous/counter flashing (Forbes Home).
- ✓Labor makes up 60% to 70% of the total bill, with masons and chimney sweeps charging $50 to $125 per hour (HomeGuide).
How much does chimney flashing repair cost?
National average
$1,000
total project
Typical range
$300–$1,800
Most projects
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Cost by material / type
| Type | Low | High |
|---|
| minor patch or resealing | $200 | $500 |
| step flashing replacement | $400 | $600 |
| continuous/counter flashing replacement | $800 | $1,000 |
| full replacement, large chimney | $500 | $1,800 |
What affects the cost?
- Extent of damage — minor cracks or lifted edges can often be patched or resealed for $200 to $500, while rusted metal, missing sections, or water infiltration under the shingles call for full replacement (HomeGuide)
- Flashing system and method — step flashing (interwoven L-shaped pieces along the chimney sides) runs $400 to $600 to replace, versus $800 to $1,000 for continuous flashing formed from a single strip of metal (Forbes Home)
- Flashing material — aluminum runs $5 to $10 per linear foot installed, galvanized steel $6 to $10, and copper $15 to $30; copper lasts 50 to 100 years versus 15 to 20 for aluminum (HomeGuide)
- Chimney size — small chimneys average $300 to $1,200 to reflash, mid-sized $400 to $1,500, and large chimneys $500 to $1,800 (HomeGuide)
- Labor, which runs 60% to 70% of the total bill — masons and chimney sweeps charge $50 to $125 per hour (HomeGuide), while Forbes Home cites a wider $25 to $175 per hour range depending on region and crew
- Chimney material and roof accessibility — natural stone is harder to cut into than brick or manufactured veneer, and steep or multi-story roofs add labor time and safety equipment (HomeGuide, Bob Vila)
- Whether it's a quick patch or a full tear-out — Fixr prices a basic flashing repair at $200 to $300 versus $300 to $800 for a full flashing replacement
How much does chimney flashing repair cost?
Chimney flashing repair costs $300 to $1,800 for most homes, averaging around $1,000 for a full professional replacement (Forbes Home). That range covers a lot of ground because “flashing repair” means different things depending on the damage: a small patch or resealing job, often quoted as a line item inside a broader chimney-repair visit, runs $200 to $300 (Fixr, Bob Vila). A full flashing replacement costs more — Forbes Home puts professional installation at $400 to $1,600, and HomeGuide’s size-based figures run $300 to $1,200 for a small chimney up to $500 to $1,800 for a large one. If you’re only dealing with a lifted edge or a small crack, expect the low end. If water has been getting in for a while and the metal is rusted or missing sections, budget for the higher end.
What’s the difference between step flashing and counter flashing repair cost?
Chimney flashing isn’t one piece of metal — it’s a layered system, and each layer has its own repair cost. Step flashing consists of L-shaped metal pieces installed along the chimney’s sides, alternating with the roof shingles to keep water from slipping between layers; replacing it runs $400 to $600 (Forbes Home). Counter flashing goes over the step flashing as a second line of defense, with its top edge embedded directly into the chimney’s mortar joints — Forbes Home prices this as “continuous flashing,” a single strip that does the same job, at $800 to $1,000. Counter/continuous flashing costs more because it requires cutting into the masonry itself, not just weaving metal between shingles (HomeGuide). If a contractor quotes you for “flashing repair” without specifying which layer, ask — the price difference is real.
What affects the cost?
A handful of factors explain the spread between a $200 patch and a $1,800 full replacement:
- Extent of damage. Small cracks or lifted edges can often be patched or resealed for $200 to $500. Rusted metal, missing sections, or water infiltration under the shingles usually means a full tear-out and replacement instead (HomeGuide). “If rust or corrosion is seen on a metal chimney or vent, replacement is needed,” says Russ Dimmitt, director of education for the Chimney Safety Institute of America, quoted by Bob Vila.
- Flashing layer. Step flashing replacement runs $400 to $600; continuous/counter flashing, which embeds into the mortar, costs $800 to $1,000 (Forbes Home).
- Material. Aluminum is cheapest at $5 to $10 per linear foot installed, galvanized steel runs $6 to $10, and copper tops the list at $15 to $30 (HomeGuide).
- Chimney size. Small chimneys average $300 to $1,200 to reflash, mid-sized $400 to $1,500, and large chimneys $500 to $1,800 (HomeGuide).
- Labor. Labor is 60% to 70% of the total bill. Masons and chimney sweeps charge $50 to $125 per hour (HomeGuide); Forbes Home’s broader range is $25 to $175 per hour.
- Chimney material and roof access. Cutting into natural stone takes longer than brick or manufactured veneer, and steep or multi-story roofs add safety equipment and labor time (HomeGuide, Bob Vila).
How to lower your chimney flashing repair cost
- Catch it early. A small leak caught before it spreads can often be patched for $200 to $500 instead of triggering a full $800-plus flashing replacement (HomeGuide).
- Choose aluminum or galvanized steel over copper unless you specifically want copper’s 50-to-100-year lifespan and patina — the material alone spans $5 to $30 per linear foot (HomeGuide).
- Bundle flashing work with a roof replacement. Flashing is required whenever a roof is redone, so pairing the two jobs avoids paying for a separate site visit and setup.
- Get multiple quotes, and ask specifically whether the estimate covers step flashing, counter/continuous flashing, or both — Forbes Home’s numbers show a $400 to $600 gap between the two.
- Watch for warning signs — water stains near the chimney, damp attic spots, visible rust, or gaps in the metal — so you catch a $200 patch job before it becomes a $1,800 replacement.
Get two or three local quotes before committing. Confirm whether the estimate includes both flashing layers, any needed roof deck repair, and cleanup, since those line items can shift the final number.
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Frequently asked questions
How much does it cost to repair chimney flashing?+
Most homeowners pay $300 to $1,800 for chimney flashing work, averaging around $1,000 for a full professional replacement (Forbes Home). A small patch or reseal job, quoted as a line item inside a broader chimney-repair visit, runs $200 to $300 (Fixr, Bob Vila).
What's the difference between step flashing and counter flashing?+
Step flashing is a series of L-shaped metal pieces woven between the shingles along the chimney's sides. Counter flashing (sometimes installed as one continuous strip) sits over the step flashing and embeds into the chimney's mortar joints for a second watertight layer (HomeGuide). Replacing step flashing runs $400 to $600; continuous/counter flashing runs $800 to $1,000 (Forbes Home).
How much does it cost to fix a small chimney flashing leak?+
Minor damage like small cracks or lifted edges can usually be patched or resealed for $200 to $500 (HomeGuide) — cheaper than a full flashing tear-out and replacement.
What's the cheapest chimney flashing material?+
Aluminum is the cheapest option at $5 to $10 per linear foot installed, with galvanized steel close behind at $6 to $10. Copper costs the most at $15 to $30 per linear foot but lasts 50 to 100 years, versus 15 to 20 years for aluminum (HomeGuide).
Does chimney size affect flashing repair cost?+
Yes. HomeGuide reports small chimneys average $300 to $1,200 to reflash, mid-sized chimneys $400 to $1,500, and large chimneys $500 to $1,800 — more chimney means more linear feet of flashing and more labor time.
How much of the cost is labor?+
Labor typically accounts for 60% to 70% of the total bill. Masons and chimney sweeps charge $50 to $125 per hour (HomeGuide), while Forbes Home cites a broader $25 to $175 per hour range depending on region and crew.
Can you repair chimney flashing yourself?+
It's possible — Forbes Home puts DIY installation at $65 to $100 in labor-equivalent effort, using a materials kit that runs about $70 to $100, versus $400 to $1,600 for professional installation. But cutting into masonry and weaving flashing into shingles for a watertight seal takes real skill, and a bad DIY job just means paying for a proper fix later.
Sources
Figures synthesized and cross-checked across these sources (retrieved 2026-07-28):
- HomeGuide — Chimney flashing repair costs $300 to $1,800 on average; minor resealing as low as $200, complete replacement on large chimneys $1,800 or more. By chimney size: small $300-$1,200, mid-sized $400-$1,500, large $500-$1,800. By material per linear foot: aluminum $5-$10, galvanized steel $6-$10, copper $15-$30. Labor is 60%-70% of total cost; masons/chimney sweeps charge $50-$125/hour. Chimney inspection $100-$250; roof inspection $100-$400; sealing $150-$400 (waterproofing up to $850).
- Forbes Home — Cost to replace chimney flashing starts around $400, ranges up to $1,600, for an overall average of about $1,000. By type: step flashing $400-$600, continuous flashing $800-$1,000. By material per linear foot: aluminum $0.75, copper $2-$3, steel $0.50. Labor $25-$175/hour; a 4-hour job runs $100-$700. Professional installation $400-$1,600; DIY installation $65-$100; DIY materials kit about $70-$100.
- Fixr — Chimney flashing repair averages $200-$300; replacing chimney flashing costs $300-$800. General chimney repair labor $50-$150/hour; scaffolding adds $50-$200; emergency same-day service adds $100-$300.
- Bob Vila — A chimney flashing repair costs $200-$300, more for larger or stone/brick chimneys. General chimney repair labor $50-$150/hour; base fee $50-$100; scaffolding adds $50-$200; emergency fees add $100-$300.
Sources split into two groups by scope. Fixr and Bob Vila both list a general 'chimney flashing repair' line item inside their broader chimney-repair guides at $200-$300, reflecting a typical single-issue patch or reseal bundled into a larger chimney-repair visit. HomeGuide and Forbes Home each publish a guide dedicated specifically to chimney flashing and report higher figures because they price the fuller job: HomeGuide's $300-$1,800 spans minor resealing (as low as $200) up to complete replacement on a large chimney, and Forbes Home's $400-$1,600 (average about $1,000) is specifically for professional flashing replacement, broken out by step flashing ($400-$600) versus continuous flashing ($800-$1,000). national_average_usd ($1,000) uses Forbes Home's explicitly stated average, which sits centrally inside HomeGuide's range and represents the full replacement job most homeowners searching for a flashing quote actually need priced — a true minor patch is a small line item, not the norm. range_low_usd/range_high_usd ($300-$1,800) follow HomeGuide's chimney-size-based typical range; project_low_usd/project_high_usd ($200-$1,800) capture the full spread from Fixr/Bob Vila's minor-patch floor to HomeGuide's large-chimney/full-replacement ceiling. Per-linear-foot material figures diverge sharply between sources — HomeGuide (aluminum $5-$10, galvanized steel $6-$10, copper $15-$30) appears to include installation labor, while Forbes Home's per-linear-foot numbers (aluminum $0.75, steel $0.50, copper $2-$3) read as raw material stock only — so by_type rows use total-project dollar figures by repair scope rather than mixing incompatible per-foot bases. Labor rates ($50-$125/hr HomeGuide, $50-$150/hr Fixr and Bob Vila, $25-$175/hr Forbes Home) are broadly consistent across all four sources. Figures are for the flashing system itself (step, counter/continuous, and base flashing); underlying roof deck repair, reshingling beyond the flashing area, or full chimney rebuild are separate costs not included here.