Step flashing
Rusted or missing step flashing along the sides is replaced to stop leaks along the sides of the chimney.
Masonry Repair
Chimney Flashing Repair Brandywine, MD
Leaks at the roof line in Brandywine usually come from flashing that has pulled loose, rusted through or been patched with tar, so the joint sheds water the way it was designed to. Dial (240) 685-5322 to talk with a local chimney sweep about the flashing.
The joint where a chimney passes through the roof is one of the most leak-prone spots on any house, and flashing is what keeps it dry. The chimney and the roof move independently as the house settles and as temperatures swing, so the seal between them has to allow for movement. Years of sun, freezing and thawing loosen the counter flashing, rust thin metal and dry out every bead of caulk.
Good flashing is a system, not a single strip of metal. Along the sides, individual step flashing pieces are layered with the shingles, while counter flashing is let into the mortar joints and lapped over them. On the uphill side, a cricket keeps water from pooling against the chimney, which matters most on wide chimneys.
Before the visit, a little information speeds things up. It helps to know the age of the roof, which side of the chimney the stain is on and whether it only leaks during heavy rain or snowmelt. Also mention any tar or caulk patches you can see from the ground, since repeated patching usually means the flashing itself has failed.
If the problem goes deeper than it first looked, a Brandywine chimney sweep may also recommend chimney leak repair or chimney waterproofing.
Need chimney flashing repair in Brandywine? Call (240) 685-5322 to talk to a local chimney sweep.
Call nowThe process
What happens during a flashing repair
Here is how a chimney technician typically handles a flashing repair.
Inspect the roof line
Each part of the flashing is inspected, along with the condition of the surrounding roofing. The attic side of the roof deck is checked for rot as well.
Rule out the masonry
Flashing leaks can be confused with crown, cap or brick leaks, so other sources are ruled out. New flashing will not stop a leak that starts at the crown.
Clear the old work
The technician strips off old roofing cement and corroded pieces down to the roof deck. Soft or rotted sheathing under the old flashing is repaired first.
Install step flashing
Step flashing goes in one piece per shingle course, so every piece overlaps the one below. A front apron and a waterproof underlayment complete the lower layers.
Cut a reglet
Counter flashing is let into a cut in the mortar joint and lapped over the step flashing so water cannot get behind it. Copper and coated steel are common choices, since bare aluminum can corrode where it meets mortar.
Build a saddle
Chimneys wider than about thirty inches usually call for a cricket on the high side under common building codes. It solves the most common cause of leaks on the uphill face.
What is included
Flashing work a chimney sweep handles
Tar patch removal
Old sealant repairs are cleaned off so the repair does not depend on sealant.
Cap flashing
Loose counter flashing is replaced and set into the masonry so water cannot run behind the step flashing.
Crickets
Missing or failed crickets are built or rebuilt and flashed to split water and snow around the chimney.
Apron flashing
The apron across the downhill face is replaced or resealed with the counter flashing lapped over it.
Related service
Chimney Flashing Replacement Brandywine, MD
When flashing is rusted, bent or covered in years of patches, replacing it outright is usually smarter than another repair. It is a full redo of the joint, from the underlayment up to the counter flashing in the mortar. A common shortcut is to reuse the old flashing during a reroof, and that often leads to a leak within a few years.
For Brandywine homeowners planning a new roof, it is worth asking that the chimney flashing be replaced at the same time. Coordinate the chimney sweep and the roofer so the step flashing goes in with the shingles and the counter flashing is set into the brick. While everything is exposed, a quick look at the crown, cap and upper mortar joints can save a second trip onto the roof.
Local help
Chimney Flashing Repair Near Me
Flashing leaks in Brandywine often show up after a big storm, heavy snow or a roof replacement that reused the old chimney flashing. Homes in Brandywine and nearby towns like Clinton, Waldorf, Accokeek and Rosaryville see the same seasonal cycle of heat, cold, rain and snow that loosens counter flashing and dries out sealant, which is why a real flashing repair outlasts another round of tar.
Need chimney flashing repair around Brandywine? Call (240) 685-5322 for a Brandywine chimney sweep who serves the towns around it too.
Chimneys in this climate
Winters here are moderate, but cold nights still come regularly and fireplaces see real use from late fall into early spring. Temperatures cross the freezing mark again and again, which is hard on brick and mortar, and soaking rains in spring and fall test every crown and flashing joint. In summer, humidity and nesting animals become the bigger issue. Most chimney cleaning in Brandywine is booked in the fall, before the first cold snap.
Why call
Why not wait
Less damage
A chimney problem fixed early rarely spreads to the masonry, the liner or the house.
Familiar with local homes
Local sweeps see the same chimney types and weather wear across Brandywine and nearby towns.
Know what happens next
Ask the sweep about the cause, the options and the estimate before work starts.
Chimney Flashing Repair questions
Can chimney flashing be repaired, or does it need replacing?
The answer depends on how much of the flashing is still sound. When only the counter flashing has come loose, resetting it is often enough. Once flashing has rust holes or years of patches, replacing it is more reliable than another repair.
What is a chimney cricket?
A cricket is a little ridge framed behind the chimney so water flows around it instead of pooling against it. Wide chimneys block a lot of runoff, and without a cricket that water sits against the flashing. For wider chimneys that do not sit on the ridge, a cricket is usually required by code.
Do I need new chimney flashing when I replace my roof?
The roof replacement is the best time to do it. Proper step flashing goes in with the shingles, so it is easiest when they are being replaced. Many leaks on newer roofs come from reused chimney flashing.
Why does my chimney flashing keep leaking after it was sealed?
Surface sealant cannot keep up with the movement between masonry and roof framing, so it fails. The real issue is usually the flashing layers underneath, not the bead on top. The leak may also be coming from the crown, cap or brick, which no flashing repair will touch.
How do I know if my chimney flashing is leaking?
Stains beside the chimney, dark wood in the attic and loose or corroded metal at the roof line are the usual giveaways. Water inside the fireplace points higher up, while water along the chimney chase or ceiling points to the roof joint. A controlled water test settles it.
More questions? Call (240) 685-5322
Related services
Chimney Leak Repair
Stopping chimney leaks at the source, instead of patching the stain on the ceiling.
Learn moreChimney Waterproofing
Treating chimney brick and mortar with a breathable water repellent, as the last step in keeping a chimney dry.
Learn moreChimney Crown Repair
Fixing cracked, thin or crumbling chimney crowns, before freeze-thaw damage spreads down the chimney.
Learn moreChimney Repair
Fixing cracked crowns, failing mortar, loose brick, leaky flashing and damaged flue tiles, before small damage turns into a rebuild.
Learn more
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