Overhangs
An overhang with a drip edge is formed into the crown to protect the brick below.
Masonry Repair
Chimney Crown Repair Morrisville, PA
A chimney sweep in Morrisville 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. Call (267) 697-3471 to reach a local chimney sweep.
A chimney crown covers the top of the brick and slopes away from the flue so water runs off instead of soaking in. Because it faces every storm, freeze and heat wave head on, the crown is usually the first part of the chimney to fail. Water that gets through a cracked crown soaks the top courses of brick and expands as it freezes.
It helps to separate the crown from the cap. A cap is metal and covers the flue opening, while the crown is concrete and covers the rest of the chimney top. One cannot stand in for the other.
Many crowns crack early because of how they were built. A common shortcut is a thin layer of mortar troweled over the top, with no overhang to throw water clear and nothing to let the flue tile expand. Mortar shrinks and cracks under weather, and an expanding flue tile will split a crown that has no room for movement.
Chimney Crown Repair is often paired with chimney cap installation and chimney leak repair, depending on the cause.
Dealing with this in Morrisville, PA right now? Call (267) 697-3471 to talk to a local chimney sweep.
Call nowThe process
What happens during a crown repair
The right fix depends on whether the crown is basically sound with surface cracks or failing all the way through.
Assess the cracks
The technician checks the crown for crack size and depth, overhang, slope and the joint around the flue tile. The cap and the upper masonry are part of the same check.
Prep the crown
Loose concrete, moss and debris are cleared and the surface is cleaned and dried. Skipping prep is the main reason crown patches peel off.
Seal minor cracks
For minor cracking, a brushable crown repair coating seals the cracks and stretches with the concrete as it moves. It works well on a structurally sound crown with surface cracks.
Replace the crown
Crowns that are breaking apart are replaced rather than patched. It is built from concrete or a crown mix rather than plain mortar, with an overhang that throws water clear.
Leave room to move
The gap around the flue tile is filled with a flexible sealant rather than locked tight in concrete. That one detail prevents the most common crown cracks.
Protect the work
A chimney cap is installed or reset over the flue once the crown has cured. Damaged upper brick and joints are often handled in the same visit.
What is included
Types of crown repair
Crown replacement
A failed crown is replaced with a properly built concrete crown built to last through many winters.
Bond breaks
The flue tile is separated from the crown so heat does not crack the crown.
Top course repair
Spalled bricks and worn joints near the top are repaired along with the crown to stop damage from spreading downward.
Crown sealer
Small cracks in a sound crown are sealed that keeps water out and moves with the concrete.
Related service
Chimney Crown Replacement Morrisville, PA
When a crown has deep cracks, loose chunks or no overhang at all, replacing it is more reliable than sealing it. First the failed crown comes off, exposing the top of the brick and the flue tile. Some crowns are cast in place on the chimney, and others use a precast crown set on a bed of mortar, both with an overhang and a gap around the flue.
In Morrisville, 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. In the meantime, a temporary cover can keep the worst of the water out. 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 Morrisville, a crown that looked fine in the fall can be cracked by spring. Across Morrisville and nearby places including Yardley, Fairless Hills, Levittown and Woodbourne, the crowns that crack first are the ones with no overhang and no room for the flue tile to move, so sealing cracks early or replacing a poorly built crown protects the rest of the chimney.
For chimney crown repair in Morrisville, PA or nearby towns like Yardley, Fairless Hills, Levittown and Woodbourne, call (267) 697-3471 to reach a chimney sweep who covers your street.
How the weather here affects chimneys around Morrisville
Cold winters keep fireplaces, wood stoves and oil burners working for half the year or more. Masonry takes the worst of it from the freeze and thaw cycle: 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 Morrisville, PA schedule a sweep in early fall, and a repair check after a hard winter.
Why call
Why act early
Smaller repairs
Small chimney problems caught early usually stay small repairs.
Sweeps who know Morrisville
Chimney sweeps in Morrisville know the chimneys and fireplaces common in local homes.
Straight answers
Ask the sweep about the cause, the options and the estimate before work starts.
Chimney Crown Repair questions
How long does a chimney crown last?
How long a crown lasts depends mostly on how it was built. Crowns made from mortar mix, with no overhang or no gap around the flue tile, fail much sooner. Yearly inspections, as NFPA 211 recommends, are the best way to keep an eye on it.
Is a chimney crown the same as a chimney cap?
Think of the crown as the roof of the chimney and the cap as the lid on the flue. The crown keeps water out of the brick, and the cap keeps rain, animals and debris out of the flue. A cap cannot make up for a cracked crown.
Can a cracked chimney crown be repaired?
How far the cracking goes decides it. Minor surface cracks are usually sealed with an elastomeric crown sealer. If the crown is cracked through, crumbling or missing pieces, replacement is the better option.
Why did my chimney crown crack?
Crowns crack from water freezing in small cracks, from being built thin out of mortar, and from the flue tile expanding against them. A crown cast tight against the flue tile will crack when the tile heats and expands. Each freeze after that makes the crack wider.
How serious is a cracked chimney crown?
A cracked crown is worth fixing quickly, even if the crack looks small. The water it lets in damages the brick, the flue and the framing around the chimney. Fixing it now is far easier than repairing the masonry damage later.
More questions? Call (267) 697-3471
Other services that may help
Chimney Cap Installation
Installing chimney caps with mesh sides so water, birds and debris stay out of the flue.
Learn moreChimney Leak Repair
Finding and stopping water that gets in through the crown, cap, flashing or brick, before the water rots framing or ruins the flue.
Learn moreChimney Masonry Repair
Repairing spalled brick, crumbling mortar, cracks and loose courses on masonry chimneys, before freeze-thaw damage spreads.
Learn moreChimney Waterproofing
Waterproofing masonry chimneys with vapor-permeable repellents, not paint, as the last step in keeping a chimney dry.
Learn more
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