Chimney Crown Repair & Replacement in Queens & Long Island
The crown is the concrete or mortar slab that caps the top of the chimney. Freeze-thaw cycles crack it, letting water into the masonry below; small cracks can be sealed, while badly broken crowns need to be replaced.
What is chimney crown repair & replacement?
The crown is the slab at the top of a masonry chimney that sheds water away from the brick. Many crowns are built as a thin layer of mortar without an overhang, which cracks quickly in freeze-thaw winters.
Hairline cracks can be sealed with a flexible crown coating. Wide cracks, crumbling crowns or crowns without a proper overhang usually need to be replaced.
Warning signs
- Cracks in the top of the chimney
- Pieces of concrete on the roof
- Water in the firebox
- Spalling brick near the top of the chimney
How SkyFlue does it
- 1Inspect and photographWe look at the chimney inside and out and photograph what we find.
- 2Clear written estimateYou get a written estimate describing the work before anything starts.
- 3Seal or removeSeal minor cracks, or remove a failed crown down to sound masonry.
- 4Build a new crownProper slope, overhang and drip edge, with a gap around the flue.
- 5Cap itA cap is usually installed or reset with the new crown.
What affects the scope
- Crack size and crown condition
- Number of flues
- Chimney size
- Whether brick below the crown also needs repair
When to call
Call when you see cracks or crumbling at the top — crown problems quickly spread into the brick.
Call (934) 271-0372Chimney Crown Repair & Replacement FAQ
What's the difference between a chimney crown and a cap?+
The crown is the masonry slab sealing the top of the chimney. The cap is the metal cover over the flue openings.
Can a cracked crown be sealed?+
Hairline cracks can often be sealed with a flexible crown coating. Wide cracks or a crumbling crown usually need replacement.
Why do crowns crack?+
Many are built too thin or without an overhang, and freeze-thaw cycles work into small cracks.
Should I get a cap with a new crown?+
Usually yes — they work together to keep water and animals out.