Roof leak repair
Leak repair
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Roofing in Frederick & Central MD
Flashing repair
Chimney, sidewall and valley flashing rebuilt in metal across Central Maryland — the junctions where a roof stops being a roof, and where almost every leak on a sound roof actually starts.
Licensed & insuredFree written estimatesFrederick-based crewClean-site guarantee
Quick answer
What does chimney flashing repair cost in Maryland?
Replacing chimney flashing in metal runs roughly $850 to $2,600 in 2026. The spread is mostly access and masonry: a single-storey chimney with sound mortar joints that will take a cut reglet is at the bottom, a tall front chimney with crumbling joints that needs the counter flashing solved differently is at the top. If the crown itself has failed, that is masonry work rather than roofing, and we will tell you before you spend money on flashing that cannot fix it.
The work
What flashing actually involves.
A roof plane sheds water perfectly well. What leaks is every place the plane is interrupted: a chimney coming through it, a wall rising out of it, two slopes meeting, a dormer landing on it. Those junctions are solved with shaped metal, and the metal has a service life shorter than the shingles around it.
The repair that goes wrong is the one done in sealant. A bead of mastic along the top of a chimney flashing buys perhaps two summers before the sun and the differential movement between brick and metal open it again, and each reapplication sits on the failed one below. Properly done, the metal is replaced and the courses above it are lifted and relaid so water runs over joints rather than into them.
The detail most often simply missing is kick-out flashing — the small diverter at the bottom of a sidewall that throws water out into the gutter instead of letting it run behind the siding. It costs almost nothing during a re-roof and its absence is a leading cause of rotten wall sheathing behind intact siding in this part of Maryland.
Chimneys and sidewalls
Kick-out flashing fitted
Metal, not mastic
What flashing costs in Maryland
Flashing work is priced per detail rather than per square foot. Access and the state of the masonry drive the spread more than the metal does.
- Chimney flashing, replaced in metal
- $850 – $2,600
- Sidewall step flashing, per run
- $600 – $1,800
- Kick-out flashing fitted, each
- $150 – $400
- Open valley relined, per valley
- $900 – $2,400
- Skylight reflashed with a proper kit
- $650 – $1,600
- Pipe or vent collar replacement
- $250 – $500
Ranges, not quotes. Real numbers come from a walkthrough — access, condition, height and finish level move a price more than square footage does. Estimates are free and in writing.
Get your numberFull flashing cost guide for MarylandPrefer to just talk?
Call and describe the job. You’ll get a straight answer on whether it’s something we do and roughly what it runs.
(301) 524-1729
Self-performed
Flashing repair
What’s included
Everything the flashing scope actually covers.
Written into the estimate, not assumed. If something on your job is not on this list, it gets priced and named before anyone starts.
Step flashing at sidewalls
01Individual pieces woven into each shingle course rather than one long bent strip. A continuous piece is faster and fails at the first seasonal movement.
Chimney counter flashing
02New base and counter flashing, with the counter let into a cut reglet in the mortar joint where the masonry allows it rather than surface-sealed to the brick face.
Kick-out flashing fitted
03At every roof-to-wall termination. If yours is missing, we fit it and show you the stain on the sheathing it should have prevented.
Valley rebuild
04Open valleys relined in metal over new membrane, closed valleys rewoven. Either way the membrane underneath is new rather than whatever was there.
Pipe, vent and skylight collars
05Boots and collars replaced as units, and skylight flashing kits used as the manufacturer supplies them. A skylight sealed in with mastic is a future ceiling repair.
Masonry defects reported, not hidden
06If the real problem is a failed chimney crown or open mortar joints, flashing will not fix it and we tell you so instead of quietly flashing around it.
On the job
Roofing work across Frederick & Central MD.
What the trade looks like at each stage. Photos of our own recent jobs come out at the walkthrough, on the actual house.
Straight answers
Flashing questions
Not covered here? Call and ask — you’ll get a real answer, not a “depends on the job”.
We can, and occasionally it is the right call — a sound flashing with one open joint, on a roof due for replacement in two years, is a reasonable candidate for a proper sealant repair with a stated two-year expectation. What we will not do is sell sealant as a repair on failed metal. Brick and metal move at different rates in Maryland's temperature swing, so a bead across that junction is a consumable, and the third application is sitting on two failed ones.
It is a small metal diverter at the point where a roof slope ends against a wall, and its job is to throw the water running down that junction out into the gutter instead of behind the siding. Yours probably does not have one because it was not standard practice for years and it takes two minutes to leave out. The consequence shows up a decade later as soft sheathing and rotten framing behind siding that looks perfectly fine from the street, which is why we fit them as a matter of course.
On our replacements, yes — all of it is new, and that is itemised rather than assumed. It is worth checking on any quote you compare us against, because reusing serviceable-looking flashing is the most common way a replacement quote comes in a few hundred dollars lower. It is also the most common reason a new roof leaks in its first two years, so the saving has a short life.
Same crew, same visit
The rest of the roofing work.
Most roofing jobs are two or three of these at once, which is why they are priced and scheduled together rather than as separate call-outs.
From the field
Read up before you book.
Longer answers than a quote page has room for — how the work fails, what putting it right actually involves, and when waiting is the honest call.
Sources worth your time
Check us, and check the work
None of these are ours. They are the offices and standards bodies that set the rules we work to, so you can verify what we say rather than take it.
Talk to the people doing the work
Get a straight number for the whole job.
Tell us what needs doing. We’ll walk it with you, sequence every trade it touches, put the price in writing, and leave you to decide.
Get a quote
Let’s price your project.
Two short steps. No obligation, no pressure — just a clear number and a straight answer about what the job involves.
Tick as many as you like. Most jobs are two or three of them at once, and I sort out the detail when I come and look. Nobody gets turned away for choosing the wrong box.
