Crown replacement
Thin mortar crowns are replaced built to last through many winters.
Masonry Repair
Chimney Crown Repair La Plata, MD
A chimney sweep in La Plata 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. Dial (240) 622-3033 to talk with a local chimney sweep about the crown.
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. A cracked crown funnels water into the chimney, where freezing and thawing break the masonry apart from the top down.
People often confuse the crown with the cap, but they are different parts. 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.
Crowns often fail sooner than they should for a few common reasons. 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. That combination tends to crack within a few winters.
Many chimney crown repair calls in La Plata also turn up a need for chimney cap installation or chimney leak repair.
Looking for La Plata chimney crown repair? Call (240) 622-3033 to talk to a local chimney sweep.
Call nowThe process
How chimney crown repair works
Here is how a chimney technician typically handles a crown repair.
Check the top
From the roof, the crown is examined for cracks, crumbling, poor slope and missing overhang. Damage to the top courses of brick or the flue tile is noted too.
Clean the surface
Any crumbling material is chipped away and the surface is prepared. Good prep decides how long the repair lasts.
Apply crown sealer
Small cracks are sealed with a flexible coating made for chimney crowns, which bridges cracks and resists water. This is a good option when the crown is solid and the cracks are caught early.
Recast the top
If the crown is crumbling, thin or cracked through, it is removed and a new one is formed and cast. A proper replacement slopes away from the flue and extends past the brick with a drip edge underneath.
Expansion joint
A bond break is left between the crown and the flue tile so the tile can expand without cracking the crown. Without it, the hot flue tile will crack a new crown just like the old one.
Protect the work
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
Crown work a chimney sweep handles
Upper brick repair
Spalled bricks and worn joints near the top are repaired along with the crown to stop damage from spreading downward.
Overhangs
The crown extends past the chimney face so water drips clear instead of running down the brick.
Crack sealing
Minor cracking is filled and coated with an elastomeric sealer to extend the life of the crown.
Expansion joints
The joint between the crown and flue tile is opened and sealed with flexible material so heat does not crack the crown.
Related service
Chimney Crown Replacement La Plata, MD
Chimney crown replacement is the right call when the crown is cracked all the way through, crumbling, missing pieces or was built too thin to last. First the failed crown comes off, exposing the top of the brick and the flue tile. A form is built around the top of the chimney, a bond break goes around the flue tile, and the new crown is cast with a slope, an overhang and a drip edge.
Crown work in La Plata depends on the season. Concrete needs to cure without freezing, so most crown replacements are done from spring into fall. A winter crown failure can often be sealed temporarily to buy time until warmer weather. It is worth asking how the new crown will handle water runoff and flue tile expansion.
Local help
Chimney Crown Repair Near Me
Chimney crowns in La Plata take the full force of the weather year round. Across La Plata and nearby places including Bensville, Waldorf, Bryans Road and Accokeek, 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.
Searching for chimney crown repair near me from La Plata or Bensville, Waldorf, Bryans Road and Accokeek? Call (240) 622-3033 to talk to a chimney sweep who works in your part of town.
What the local climate does to a chimney
The heating season here is shorter than up north, yet most winters bring plenty of cold nights by the fire. Temperatures cross the freezing mark again and again, which is hard on brick and mortar, and heavy rain through the year keeps chimneys wet. In summer, humidity and nesting animals become the bigger issue. Most chimney cleaning in La Plata is booked in the fall, before the first cold snap.
Why call
Why act early
Safer fires
Small chimney problems caught early usually stay small repairs.
Sweeps who know La Plata
Local sweeps see the same chimney types and weather wear across La Plata and nearby towns.
Know what happens next
Ask the sweep about the cause, the options and the estimate before work starts.
Chimney Crown Repair questions
Is a cracked chimney crown a big deal?
Crown cracks start small but cause damage well beyond the crown. 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.
What is the difference between a chimney crown and a chimney cap?
Think of the crown as the roof of the chimney and the cap as the lid on the flue. They protect different parts of the chimney. Adding a cap will not fix crown damage.
What causes chimney crowns to crack?
The most common causes are freeze-thaw cycles, poor construction and flue tile expansion. Many crowns are troweled from mortar mix with no overhang and no gap around the flue tile, so they crack within a few years. Once a crack forms, water gets in, freezes and widens it every winter.
Can a cracked chimney crown be repaired?
How far the cracking goes decides it. Hairline cracks in a solid crown can be sealed with a flexible crown coating that bridges the cracks and keeps water out. If the crown is cracked through, crumbling or missing pieces, replacement is the better option.
When does a chimney crown need replacing?
How long a crown lasts depends mostly on how it was built. 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.
More questions? Call (240) 622-3033
Related services
Chimney Cap Installation
Fitting a metal cap over the top of the flue sized to the flue tile or the whole crown.
Learn moreChimney Leak Repair
Tracing chimney leaks to the real entry point and sealing it, 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, applied after repairs so the brick sheds water but can still dry out.
Learn more
Looking for something else?
See all chimney servicesTalk to a La Plata chimney sweep about chimney crown repair
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(240) 622-3033
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