Cost Guide
Chimney and Flashing Repair Cost by Material
Chimney flashing repair cost varies significantly by the metal used -- aluminum and galvanized steel run noticeably less per linear foot than copper -- on top of chimney size and whether the job is a targeted resealing or a full flashing replacement.
Direct Answer
Chimney flashing repair cost varies significantly by the metal used -- aluminum and galvanized steel run noticeably less per linear foot than copper -- on top of chimney size and whether the job is a targeted resealing or a full flashing replacement.
No Fixed Price Range
Published 2026 per-linear-foot material pricing: aluminum about $5-$10, galvanized steel about $6-$10, and copper about $15-$30 -- copper costs meaningfully more but is also the most corrosion-resistant and longest-lasting of the three. By chimney size, total job cost commonly runs $300-$1,200 for a small chimney, $400-$1,500 for a mid-sized one, and $500-$1,800 for a large one, with minor sealant-only resealing sometimes as low as $200-$500. Labor typically makes up 60-70% of the total. These are general published ranges, not a quote -- get a written estimate from your matched provider based on your chimney's actual size and material before assuming a price.
What Affects the Cost
Pricing should be confirmed directly with the matched provider before work starts. Common factors include:
- Flashing material -- aluminum, galvanized steel, or copper, each with a different per-linear-foot cost.
- Chimney size, which scales the total linear footage of flashing needed.
- Whether the job is a minor resealing or a full flashing replacement.
- Roof pitch and chimney height, which affect access and labor time.
- Whether surrounding shingles or decking also need attention as part of the same visit.
Cost Questions Homeowners Ask
Is this different from a targeted single-component flashing repair?
Yes -- if only one specific piece (like step flashing or a cricket) has failed, a targeted repair is often smaller in scope and cost than a full material-based estimate like the ranges here, which assume replacing the flashing system more broadly. Ask your provider which scope applies to your situation.
Is copper flashing worth the higher cost?
Copper costs roughly 2-3x more per linear foot than aluminum or galvanized steel, but it's also more corrosion-resistant and commonly lasts longer, which can offset the higher upfront cost over the life of the chimney. The right choice depends on your budget and how long you plan to stay in the home.
Does chimney flashing repair cost more than replacing the whole roof section around it?
Generally no -- flashing repair addresses just the affected metal (and mortar, if needed), which is typically a smaller job than replacing a broader section of roofing material. Get a specific estimate to compare your actual options.