Cap flashing
Counter flashing is set into ground-out mortar joints so it overlaps the step flashing.
Roof Repair
Chimney Flashing Repair Rahway, NJ
Most leaks around a chimney in Rahway come from the flashing, and a roofer can fix them with new step and counter flashing set into the brick instead of tar, with a cricket behind wide chimneys to keep water from piling up. Dial (908) 562-6861 to talk with a local roofer about the chimney leak.
Few places on a roof leak as often as the gap around a chimney. Because the chimney and the roof are separate structures, the flashing has to bridge a joint that never stops moving. Tar and caulk alone cannot handle that movement for long.
Each side of a chimney gets its own kind of flashing. Along the front sits a one-piece apron, step pieces run up each side with the shingles, a saddle or cricket diverts water behind, and counter flashing ground into the mortar covers the top edges. Counter flashing is the piece that most often fails or is skipped, replaced by surface-mounted metal and a bead of caulk.
Before replacing flashing, it helps to know whether the chimney above the roof is letting water in. Brick and mortar absorb rain, and a cracked crown or open joints can let water travel down through the masonry to the roof line. Sorting out which one is leaking avoids paying for the wrong repair.
Depending on what the roofer finds, chimney flashing repair in Rahway, NJ can go hand in hand with flashing repair and roof leak repair.
Need chimney flashing repair in Rahway? Call (908) 562-6861 to talk to a local roofer.
Call nowThe process
What happens during chimney flashing repair
The work follows the path water takes, front to back.
Check the joint
The roofer looks at the flashing on all four sides, the mortar joints, the crown and cap and the attic framing around the chimney. A hose test on one side at a time can confirm the source.
Strip the old flashing
The roofer removes the existing metal, layers of tar and the nearby shingles. Soft or rotted decking around the chimney is replaced at this stage.
Install the base flashing
A membrane underlayment goes around the chimney, then the front apron and the side step flashing are installed with the shingles. Nothing is fastened to the masonry at this stage, so the roof and chimney can move.
Install the back pan
The upslope side gets a saddle or, for wide chimneys, a small peaked cricket that sheds water to both sides. Building codes call for a cricket behind chimneys wider than about thirty inches across the slope.
Cut in the counter flashing
Counter flashing is let into a ground-out mortar joint and sealed, overlapping the base flashing below. Set into the brick, it lasts far longer than metal glued to the face.
What is included
What chimney flashing repair covers
Chimney saddle
Water and debris are steered around the chimney so water cannot pond against the brick.
Decking repair
Water-damaged wood at the chimney is cut out so the shingles have solid nailing.
Step flashing
Side flashing is woven in with new shingles nailed to the deck, not the brick.
Apron flashing
A one-piece apron is installed across the downhill face with counter flashing over it.
Related service
Chimney Flashing Replacement Rahway, NJ
Chimney flashing replacement makes sense when the metal is rusted, the counter flashing is only glued to the brick or the joint has been tarred over several times. If the original flashing was installed incorrectly, more sealant cannot correct the lapping. It is also the right moment to add a cricket or back pan.
Not every flashing metal suits brick. Copper and lead-coated copper last a very long time and form neatly to brick, galvanized steel is durable when painted, and aluminum should be coated or kept out of direct contact with mortar, which can corrode it. Matching the metal to the masonry avoids early corrosion.
Related service
Chimney Leak Repair Rahway, NJ
Leaks around a chimney have two main sources: the flashing at the roof and the masonry above it. Water that appears only in hard rain at the base points to flashing, while a slow leak that lingers after rain hints at soaked brick or a cracked crown. Testing the flashing and the masonry separately pins down the source.
Leaks through the chimney body need masonry work rather than flashing. Typical fixes are crown repair, a new cap and repointing of open mortar joints, sometimes followed by a vapor-permeable masonry water repellent. The roofer can spot many of these from the roof and tell you who should fix them.
Local help
Chimney Flashing Repair Near Me
Chimney flashing calls in Rahway come mostly from older brick chimneys that have been reflashed with tar more than once. Across Rahway and nearby communities including Avenel, Colonia, Linden and Iselin, the chimney type decides the fix: masonry needs counter flashing cut into the brick, and a framed chase needs step flashing behind the siding, so it helps to know which kind you have when you call.
Need chimney flashing repair around Rahway? Call (908) 562-6861 for a Rahway roofer who serves the towns around it too.
How the weather here affects roofs around Rahway
Winters here are long and cold, with snow on the roof for weeks at a time and plenty of nights below freezing. Heat escaping from the attic melts snow on the upper roof, and the water refreezes at the colder eaves, building ice dams that push water up under the shingles. Strong coastal storms push rain into every weak spot at the flashing and valleys. Most homeowners in Rahway, NJ have the roof checked in the fall and again after the snow melts.
Why call
Why fix it now
Smaller repairs
A roof problem fixed early rarely spreads to the decking, the insulation or the ceilings.
Local knowledge
Local roofers see the same roofs and storm damage across Rahway and nearby towns.
Clear next steps
Ask the roofer about the cause, the options and the estimate before work starts.
Common questions about chimney flashing repair
Can chimney flashing be repaired without replacing it?
Minor problems such as a loose counter flashing piece can be refastened into the mortar. When the metal is rusted, missing pieces or was never installed correctly, replacement is the lasting fix. Another coat of tar is a short-term patch.
How do I know if my chimney flashing is leaking?
Water marks beside the chimney inside the house are the usual first clue. In the attic, wet or dark framing around the chimney opening points the same way. On the roof, rusted metal, loose counter flashing and heavy tar are warning signs. Call (908) 562-6861 to have a roofer check it.
Why is my chimney still leaking after new flashing?
When new flashing does not stop the leak, the masonry is the usual suspect. Rain soaks through porous brick or a cracked crown and runs down inside the chimney. Sometimes moisture inside the flue itself is to blame. Call (908) 562-6861 to have the source traced.
Why does my chimney need a cricket?
It is a little roof-like peak that sits behind the chimney. Water flowing down the slope hits the cricket and is steered around both sides. Wide chimneys need one under most building codes.
Should a roofer or a mason repair my chimney flashing?
A roofer handles the flashing, because it has to be woven into the roof. Roofers routinely grind the mortar joint and set counter flashing. If the crown, cap or brick is damaged, a mason handles that part.
More questions? Call (908) 562-6861
Often needed together
Flashing Repair
Flashing repairs at the joints where most roof leaks start, so water runs onto the shingles instead of into the wall.
Learn moreRoof Leak Repair
Finding where water gets through the roof and sealing it at the source, so the stain on the ceiling stops growing.
Learn moreRoof Leak Detection
Finding stubborn leaks that earlier patches missed, with a clear answer on roof leak versus condensation.
Learn moreShingle Roof Repair
Replacing missing, creased or cracked shingles, resealing lifted tabs and fixing popped nails, before a small gap turns into a leak.
Learn more
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