Drip edges
The crown extends past the chimney face so water drips clear instead of running down the brick.
Masonry Repair
Chimney Crown Repair Burtonsville, MD
A chimney sweep in Burtonsville 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 (240) 358-7617 to reach a local chimney sweep.
At the very top of a masonry chimney sits the crown, a sloped slab that seals the brick around the flue and sheds rain. Because it faces every storm, freeze and heat wave head on, the crown is usually the first part of the chimney to fail. Once it cracks, water runs straight into the brick and mortar below, and every freeze widens the crack.
It helps to separate the crown from the cap. The crown is the masonry slab, while the cap is the metal cover with a mesh screen that sits over the flue opening. Both matter, but a cap does nothing for a cracked crown.
A lot of crown failures trace back to the original construction. 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.
Chimney Crown Repair is often paired with chimney cap installation and chimney leak repair, depending on the cause.
Looking for Burtonsville chimney crown repair? Call (240) 358-7617 and describe the problem to a chimney sweep who works in Burtonsville.
Call nowThe process
What happens during a crown repair
Here is how a chimney technician typically handles a crown repair.
Inspect the crown
The crown is tapped and checked to see whether it is solid with surface cracks or breaking up. The cap and the upper masonry are part of the same check.
Prep the crown
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.
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. It is one of the most overlooked parts of a crown.
Finish the top
A chimney cap is installed or reset over the flue once the crown has cured. Any spalled brick at the top can be repaired at the same time.
What is included
Types of crown repair
Crown sealer
Minor cracking is filled and coated with an elastomeric sealer before water and frost can widen them.
Expansion joints
The joint between the crown and flue tile is opened and sealed with flexible material to prevent the most common type of crown crack.
Upper brick repair
The brick under the crown is repointed or replaced where needed to stop damage from spreading downward.
Crown rebuilding
A failed crown is replaced with a properly built concrete crown built to last through many winters.
Related service
Chimney Crown Replacement Burtonsville, MD
A crown that is breaking apart or was built from thin mortar usually needs to be replaced rather than coated. The old crown is broken out down to the brick, and the top courses are checked and repaired if needed. 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 Burtonsville, the weather affects when a crown can be replaced. Because new concrete is vulnerable to frost while it cures, crown work is easier outside the coldest months. In the meantime, a temporary cover can keep the worst of the water out. Ask the chimney sweep whether the new crown will have an overhang, a drip edge and an expansion joint at the flue, since those three details decide how long it lasts.
Local help
Chimney Crown Repair Near Me
Chimney crowns in Burtonsville take the full force of the weather year round. Homes in Burtonsville and nearby towns like West Laurel, Fulton, Fairland and Scaggsville include plenty of older chimneys whose crowns were troweled from mortar rather than built as proper concrete crowns, so sealing cracks early or replacing a poorly built crown protects the rest of the chimney.
For chimney crown repair in Burtonsville, MD or nearby towns like West Laurel, Fulton, Fairland and Scaggsville, call (240) 358-7617 to reach a chimney sweep who covers your street.
How the weather here affects chimneys around Burtonsville
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: rain and melting snow soak into the crown and joints, then freeze and push them apart, which is how cracks, loose bricks and leaks start. Wind driven rain from coastal storms finds any gap in flashing, too. That is why chimney cleaning in Burtonsville is usually booked in the fall, before the first cold night.
Why call
Why act early
Safer fires
Small chimney problems caught early usually stay small repairs.
Local knowledge
Local sweeps see the same chimney types and weather wear across Burtonsville and nearby towns.
Clear next steps
Ask the sweep about the cause, the options and the estimate before work starts.
Common questions about chimney crown repair
Do I need a new crown if mine is cracked?
How far the cracking goes decides it. 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?
Crowns crack from water freezing in small cracks, from being built thin out of mortar, and from the flue tile expanding against them. Thin mortar crowns with no room for flue tile movement tend to crack early. Each freeze after that makes the crack wider.
When does a chimney crown need replacing?
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.
Is a chimney crown the same as 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. 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.
Is a cracked chimney crown a big deal?
A cracked crown is worth fixing quickly, even if the crack looks small. 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.
More questions? Call (240) 358-7617
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
Tracing chimney leaks to the real entry point and sealing it, 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, with materials matched to the original masonry.
Learn moreChimney Waterproofing
Waterproofing masonry chimneys with vapor-permeable repellents, not paint, applied after repairs so the brick sheds water but can still dry out.
Learn more
Looking for something else?
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(240) 358-7617
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