Chimney Crown Repair and Waterproofing in Delaware County and the Main Line
A damaged chimney crown is one of the most common sources of chimney leaks our team sees in Delaware County and across the Main Line. Crown repair, paired with the right waterproofing product, is one of the most cost-effective things you can do to extend the life of a chimney.
Lou Curley’s Chimney Service repairs cracked and deteriorated crowns and seals them with CrownSaver, the industry’s leading crown waterproofing product. Our team is CSIA, NFI, and F.I.R.E. certified, and our founder, Lou Curley, is Pennsylvania’s first CSIA Master Chimney Sweep. Call 610-626-2439 or request an appointment online.
What Is a Chimney Crown?
The crown is the concrete or mortar slab that covers the top of the chimney. Its job is to direct rainwater and snowmelt away from the flue and the brickwork below, instead of letting water seep down the sides of the chimney where it does the most damage. Together with the chimney cap, the crown is your chimney’s first line of defense against water.
When the crown cracks or deteriorates, water gets into the chimney. Once water is in, the damage compounds: mortar joints fail, flue tiles crack, dampers rust, and the masonry below the roofline starts to deteriorate from the inside out. The cost of fixing all of that is many times the cost of repairing the crown.
How We Repair a Chimney Crown
Crown problems come in different sizes, and so do the fixes. Our team will recommend the right level of repair after inspecting the crown, not a one-size-fits-all approach.
- CrownSaver waterproofing. For crowns with hairline cracks and minimal damage, we apply CrownSaver, a flexible crown sealant designed specifically for this job. CrownSaver bonds to the existing crown, fills hairline cracks, and creates a waterproof membrane that flexes with the concrete as temperatures change. This is the workhorse product for most of the crown repairs we do, and it carries a manufacturer’s warranty.
- Crown patch and seal. For crowns with moderate damage, we patch larger cracks and gaps before sealing with CrownSaver. This restores the crown’s structural function and waterproofs the repair in one visit.
- Full crown rebuild (rare). In cases where the crown is missing or so far gone that patching is not viable, we can pour a new concrete crown with a built-in drip edge. Full crown rebuilds are uncommon: most crowns we inspect can be repaired and waterproofed, not replaced. If our inspection turns up a true crown rebuild candidate, we will walk you through the scope and the alternatives before any work starts.
Common Signs of Chimney Crown Damage
A few things to watch for that might indicate the crown needs attention:
- Visible cracks. Temperature swings and house settling cause cracks. Small cracks become big ones quickly once water is involved.
- Missing pieces. If chunks of the crown are missing or you see concrete fragments around the foundation, on the roof, or in the firebox, the crown is failing.
- Pooled water on the chimney top. Water that pools instead of running off means the crown’s drainage is compromised. Water in the firebox is another sign.
- Rust in the fireplace. Rust means moisture is getting in somewhere, and a damaged crown is one of the more common culprits.
- Interior wall damage. Stains, discoloration, or fraying paint on the ceilings or walls near the chimney often trace back to a chimney leak, with the crown as a starting point.
- Mortar joint damage. When the crown stops shedding water, the brick and mortar below it suffer next.
What Causes Chimney Crowns to Deteriorate
A few common causes our team sees:
- Natural wear and tear. Concrete crowns slowly degrade under constant freeze-thaw cycles. This is why annual inspections matter: we catch the damage early, before the inside of the chimney is affected.
- Improper original construction. A lot of older crowns in our service area were built with mortar instead of concrete, which is the wrong material for the job. Those crowns fail much faster than crowns built to spec.
- Weather. Heat, cold, wind, and ice all take a toll on a crown. The crown is the most exposed concrete surface on the whole house.
Why Homeowners in Delaware County and the Main Line Choose Our Team
A crown repair is only as good as the diagnosis and the product behind it. Our team holds CSIA, NFI, and F.I.R.E. certifications and has done this work on chimneys across Delaware County and the Main Line for years. We use CrownSaver because it is the right product, not because it is the cheapest. Our founder, Lou Curley, is Pennsylvania’s first CSIA Master Chimney Sweep.
Damaged Crown? Call Our Team
If you suspect a chimney leak or a damaged crown, call 610-626-2439 or request an appointment online. We will inspect the chimney for leaks, identify weaknesses, and recommend the right level of repair for your crown.
To reduce the need for chimney leak repairs overall, ask our team about pairing crown repair with masonry repair and waterproofing and a full-coverage chimney cap for the most complete water protection a chimney can have.