A roof leak around a chimney is one of the most common calls a Greenville roofer gets, and one of the most misdiagnosed. The stain on the ceiling is often a few feet from the actual entry point, because water travels along rafters and decking before it drips. People searching for chimney flashing repair, chimney leak cost or roof repair around a chimney usually want two answers: what is wrong and what it costs.
The good news is that a chimney leak caught early is often a repair, not a roof replacement.
Why roofs leak around chimneys
A chimney is a masonry mass that moves differently from the roof around it, and every joint between the two is a place for water to get in. The usual causes, roughly in order of frequency, are below.
- Failed or lifted flashing: the metal that steps up the sides of the chimney and wraps the base has pulled away, rusted or been sealed with caulk that dried out
- Counter-flashing gaps: the upper layer set into the mortar joints can loosen as the mortar erodes
- Cracked or deteriorated mortar and a missing or cracked chimney crown, which let water in through the masonry itself
- No cricket on a wide chimney: water pools behind the chimney instead of flowing around it
- Condensation inside the chimney or the attic, which can look like a leak but is not coming from the roof
What is a chimney cricket, and does your chimney need one?
A cricket, also called a saddle, is a small peaked structure built on the uphill side of the chimney to divert water around it. Secondary sources quoting the International Residential Code say one is required on the ridge side of a chimney more than 30 inches wide, measured across the slope. The code edition adopted locally governs, so confirm with the roofer and the permit office. If your wide chimney has a flat, shingled shelf behind it with no cricket, that is a likely leak point.
Chimney leak repair cost in Greenville
From our roof repair page, repairing or resealing flashing runs about $400 to $1,200 in the Greenville market, which includes chimney, wall and valley flashing. Building a cricket, repointing mortar or repairing a crown adds to that and is priced by the job; we have no sourced Greenville range for masonry work, so ask for it as a separate line in the estimate.
| Repair | Typical cost | Notes |
|---|---|---|
| Repair or reseal flashing | $400 – $1,200 | Chimney, wall and valley flashing (from our repair page) |
| Replace missing or damaged shingles | $300 – $850 | Depends on match and access |
| Cricket, mortar or crown work | Quote per job | Ask for a separate written line item |
What to do when you see the stain
- Photograph the ceiling stain with a date, and check the attic for wet insulation or dark decking near the chimney
- Place a bucket or tarp as needed, but do not climb on a wet roof
- Do not just caulk it: roofing sealant over failed flashing buys a season at most
- Book an inspection: a licensed roofer will check the flashing, mortar, crown and cricket from the roof and the attic
Repair or replace when the chimney leaks
If the roof is under about 15 years old and the leak is isolated, repair is almost always right. If the roof is 20 to 25 years old, or has leaks elsewhere, the chimney leak may be a sign that the whole system is finished. Use the repair or replace guide and the signs you need a new roof to decide.
Our roofing services
Related Guides and Services
- Roof repair cost in Greenville
- Roof repair in Greenville: leak and flashing repair prices
- Free roof inspection
- Repair or replace your roof
How Greenville Roofing Experts Works
We are a referral service, not a roofing company. Your request goes to one licensed South Carolina roofer serving the Greenville area, and the referral costs you nothing. See how we vet our pros for the bar that roofer has to clear, read about us and why this arrangement works, or check the answers to common roofing questions. For anything else, contact us.
Chimney Leak Questions
How much does it cost to fix a roof leak around a chimney?
About $400 to $1,200 for flashing repair in the Greenville market. Cricket, mortar or crown work is extra and quoted per job.
Can I fix a chimney leak with roofing cement?
It may stop a drip briefly, but caulk over failed flashing rarely lasts. Proper repair replaces or reseals the flashing.
Why does my roof leak around the chimney only when it rains hard?
Wind-driven or heavy rain finds gaps that light rain does not. Flashing gaps and a missing cricket are the usual causes.
Do I need a new roof if the chimney leaks?
Not usually. A single chimney leak on a roof under 15 years old is a repair. Several leaks on a roof past 20 years point toward replacement.
Sources
Repair costs are this site's Greenville market ranges (modelled). The cricket requirement is quoted in secondary sources; confirm the adopted code edition with the permit office.
- GAF, What Is a Roof Cricket?. Cricket purpose; 30-inch threshold quoted from IRC R903.2.2 in secondary sources
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