Top course repair
Damage to the top courses from a leaking crown is fixed in the same job so the new crown sits on sound masonry.
Masonry Repair
Chimney Crown Repair Shrewsbury, NJ
A chimney sweep in Shrewsbury can seal hairline cracks in a chimney crown or rebuild a crown that is breaking apart, with a design that sheds water past the masonry. One call to (732) 876-9672 reaches a nearby chimney crown pro.
At the very top of a masonry chimney sits the crown, a sloped slab that seals the brick around the flue and sheds rain. Sitting fully exposed at the highest point of the house, it takes a beating from rain, snow and sun. Once it cracks, water runs straight into the brick and mortar below, and every freeze widens the crack.
A crown is not the same as a chimney cap, though the words are often mixed up. The crown is the masonry slab, while the cap is the metal cover with a mesh screen that sits over the flue opening. One cannot stand in for the other.
Many crowns crack early because of how they were built. Builders and roofers often form the crown from mortar mix spread thin and flush with the brick, with no overhang and no gap around the flue tile. Mortar is not meant for that job, and a flue tile that heats and expands will crack a crown that is cast tight against it.
Many chimney crown repair calls in Shrewsbury also turn up a need for chimney cap installation or chimney leak repair.
Dealing with this in Shrewsbury, NJ right now? Call (732) 876-9672 and describe the problem to a chimney sweep who works in Shrewsbury.
Call nowThe process
The crown repair process
Crown repair runs from a simple seal coat to a full rebuild, depending on the damage.
Check the top
The crown is tapped and checked to see whether it is solid with surface cracks or breaking up. The flue tile, cap and upper brick are checked at the same time, since crown damage often spreads to them.
Remove loose material
Any crumbling material is chipped away and the surface is prepared. Skipping prep is the main reason crown patches peel off.
Apply crown sealer
Hairline cracks in an otherwise sound crown are filled and the whole crown is coated with a flexible, elastomeric crown sealer. This is a good option when the crown is solid and the cracks are caught early.
Rebuild if needed
A failing crown is chipped off and replaced with a properly built concrete crown. The new crown is sloped, overhangs the brick with a drip edge and is thick enough to resist cracking.
Leave room to move
A bond break is left between the crown and the flue tile so the tile can expand without cracking the crown. It is one of the most overlooked parts of a crown.
Cap the flue
With the crown done, a cap with a mesh screen is added to keep rain and animals out of the flue. It is a good moment to repoint the top courses if needed.
What is included
Types of crown repair
Drip edges
An overhang with a drip edge is formed into the crown to protect the brick below.
Crown replacement
Thin mortar crowns are replaced that sheds water past the brick.
Crack sealing
Small cracks in a sound crown are sealed that keeps water out and moves with the concrete.
Bond breaks
The flue tile is separated from the crown so heat does not crack the crown.
Related service
Chimney Crown Replacement Shrewsbury, NJ
A crown that is breaking apart or was built from thin mortar usually needs to be replaced rather than coated. First the failed crown comes off, exposing the top of the brick and the flue tile. Forms are set to create the overhang, the flue tile is wrapped to allow movement, and concrete is placed and sloped away from the flue.
In Shrewsbury, the weather affects when a crown can be replaced. Fresh concrete should not freeze while it cures, which makes mild weather the best time for the job. A winter crown failure can often be sealed temporarily to buy time until warmer weather. Make sure the plan includes a drip edge and a flexible joint around the flue, not just new concrete.
Local help
Chimney Crown Repair Near Me
In Shrewsbury, a crown that looked fine in the fall can be cracked by spring. Homes in Shrewsbury and nearby towns like Little Silver, Red Bank, Oceanport and Eatontown include plenty of older chimneys whose crowns were troweled from mortar rather than built as proper concrete crowns, and a properly built crown is one of the best investments in a chimney.
Searching for chimney crown repair near me from Shrewsbury or Little Silver, Red Bank, Oceanport and Eatontown? Call (732) 876-9672 to talk to a chimney sweep who works in your part of town.
How the weather here affects chimneys around Shrewsbury
Cold winters keep fireplaces, wood stoves and oil burners working for half the year or more. The hardest thing on brick here is not the cold itself but the constant swing above and below freezing: water soaks into brick, mortar joints and the crown on a mild day, freezes overnight and expands, which is how cracks, loose bricks and leaks start. Wind driven rain from coastal storms finds any gap in flashing, too. Most homeowners in Shrewsbury, NJ schedule a sweep in early fall, and a repair check after a hard winter.
Why call
Why not wait
Less damage
A chimney problem fixed early rarely spreads to the masonry, the liner or the house.
Local knowledge
Local sweeps see the same chimney types and weather wear across Shrewsbury and nearby towns.
Straight answers
Ask your questions before you agree to anything.
Chimney Crown Repair questions
How long does a chimney crown last?
A well-built crown can last a very long time, while a thin mortar crown may crack within a few years. The weak ones are thin, flush with the brick and cast tight to the flue. Having the crown checked each year lets you seal cracks before replacement is needed.
Do I need a new crown if mine is cracked?
That depends on how deep and widespread the cracks are. If the crown is sound with only small cracks, a crown coating is often all it needs. A crown that is breaking apart or was built too thin usually needs to be replaced.
What causes chimney crowns to crack?
The most common causes are freeze-thaw cycles, poor construction and flue tile expansion. Thin mortar crowns with no room for flue tile movement tend to crack early. Water and frost then finish the job.
How serious is a cracked chimney crown?
Small crown cracks deserve attention because they let water straight into the chimney. Water that gets through a crack soaks the brick and mortar, freezes and causes spalling, crumbling joints and leaks. Fixing it now is far easier than repairing the masonry damage later.
What is the difference between a chimney crown and a chimney cap?
A crown is masonry and seals the top of the chimney, while a cap is a metal hood with a screen that covers the flue itself. They protect different parts of the chimney. A damaged crown needs its own repair.
More questions? Call (732) 876-9672
Often needed together
Chimney Cap Installation
Putting a sturdy cap on top of the chimney sized to the flue tile or the whole crown.
Learn moreChimney Leak Repair
Stopping chimney leaks at the source, whether the drip shows up in the attic, the ceiling or the firebox.
Learn moreChimney Masonry Repair
Fixing the brick, stone and mortar that hold a chimney together, so the chimney stays solid and dry.
Learn moreChimney Waterproofing
Treating chimney brick and mortar with a breathable water repellent, to slow freeze-thaw damage and spalling.
Learn more
Looking for something else?
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Call (732) 876-9672 to talk to a chimney sweep serving Shrewsbury, NJ.
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