Crown rebuilding
A failed crown is replaced with a properly built concrete crown that sheds water past the brick.
Masonry Repair
Chimney Crown Repair Sunbury, PA
A chimney sweep in Sunbury can seal hairline cracks in a chimney crown or rebuild a crown that is breaking apart, so rain stops soaking into the brick from above. Call (272) 238-4101 to reach a local chimney sweep.
The chimney crown is the slab of concrete or mortar on top of the chimney, around the flue tile, and its job is to keep water out of the masonry below. 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.
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. Both matter, but a cap does nothing for a cracked crown.
A lot of crown failures trace back to the original construction. 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.
If the problem goes deeper than it first looked, a Sunbury chimney sweep may also recommend chimney cap installation or chimney leak repair.
Need chimney crown repair in Sunbury? Call (272) 238-4101 to talk to a local chimney sweep.
Call nowThe process
The crown repair process
Here is how a chimney technician typically handles a crown repair.
Assess the cracks
The crown is tapped and checked to see whether it is solid with surface cracks or breaking up. Damage to the top courses of brick or the flue tile is noted too.
Prep the crown
Any crumbling material is chipped away and the surface is prepared. Repairs only hold on a clean, sound, dry surface.
Coat the crown
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
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
The crown is separated from the flue tile by an expansion joint sealed with flexible material. That one detail prevents the most common crown cracks.
Finish the top
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
Crown work a chimney sweep handles
Overhangs
An overhang with a drip edge is formed into the crown which keeps runoff from soaking the masonry.
Expansion joints
The flue tile is separated from the crown to prevent the most common type of crown crack.
Crack sealing
Hairline cracks are sealed with a flexible crown coating that keeps water out and moves with the concrete.
Top course repair
The brick under the crown is repointed or replaced where needed to stop damage from spreading downward.
Related service
Chimney Crown Replacement Sunbury, PA
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. 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.
Crown work in Sunbury depends on the season. Concrete needs to cure without freezing, so most crown replacements are done from spring into fall. 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
Around Sunbury, crown cracks usually show up after a winter of freezing and thawing. From Sunbury out to neighboring communities such as Northumberland, Winfield, Selinsgrove and Lewisburg, many original crowns are thin, flush with the brick and locked tight against the flue tile, which is a recipe for cracking, which is why catching crown cracks in their first season keeps the repair simple.
For chimney crown repair in Sunbury, PA or nearby towns like Northumberland, Winfield, Selinsgrove and Lewisburg, call (272) 238-4101 to reach a chimney sweep who covers your street.
Chimneys in this climate
Winters here are long and cold, and the heating season usually runs from October well into April. 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 Sunbury is usually booked in the fall, before the first cold night.
Why call
Why fix it now
Smaller repairs
Small chimney problems caught early usually stay small repairs.
Local knowledge
Local sweeps see the same chimney types and weather wear across Sunbury and nearby towns.
Clear next steps
Ask your questions before you agree to anything.
Chimney Crown Repair questions
Do I need a new crown if mine is cracked?
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. Deep cracks and loose chunks call for a new crown.
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. They protect different parts of the chimney. A damaged crown needs its own repair.
Is a cracked chimney crown a big deal?
Small crown cracks deserve attention because they let water straight into the chimney. Once water reaches the masonry, it leads to spalled brick, failing mortar, rusted dampers and damaged flue tiles. Sealing a crack early is a small job, while ignoring it can lead to rebuilding the top of the chimney.
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. An annual inspection catches cracks while they can still be sealed.
What causes chimney crowns to crack?
Weather, shortcuts in the original build and heat from the flue are behind most crown cracks. A crown cast tight against the flue tile will crack when the tile heats and expands. Water and frost then finish the job.
More questions? Call (272) 238-4101
Related services
Chimney Cap Installation
Putting a sturdy cap on top of the chimney to keep out rain, animals, leaves and stray sparks.
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
Protecting chimney masonry from rain with a penetrating repellent, applied after repairs so the brick sheds water but can still dry out.
Learn more
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See all chimney servicesGet chimney crown repair help in Sunbury
Call (272) 238-4101 to talk to a chimney sweep serving Sunbury, PA.
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