In many New York homes, especially in Westchester County, the chimney is not just an architectural feature—it plays a critical role in heating, ventilation, and fire safety. However, due to the region’s seasonal climate and aging housing stock, chimneys often suffer from wear and tear that requires timely attention.
At On Time Roofing, we’re more than just a leading provider of roofing services in Westchester County. We’re also seasoned experts in chimney repair and maintenance. In this blog, we explore the most common chimney problems we see across local homes—and how to effectively resolve them.
1. Cracked or Deteriorating Mortar Joints
One of the most frequent issues in older chimneys is crumbling mortar joints. The mortar that binds chimney bricks can break down over time due to freeze-thaw cycles, water infiltration, and aging.
Fix:
A process called tuckpointing can repair damaged mortar without replacing the entire chimney. We remove the deteriorated joints and reapply fresh mortar, restoring the structural integrity and sealing out moisture.
Tip: If neglected, deteriorating mortar can lead to full brick displacement and costly structural repairs. It’s best to act early with the help of a professional chimney contractor in Westchester County.
2. Chimney Leaks and Water Intrusion
Water is a chimney’s worst enemy. Leaks can enter through cracked crowns, flashing, or worn-out mortar. These leaks often lead to interior ceiling stains, mold, and weakened masonry.
Fix:
Our expert team at On Time Roofing performs full chimney waterproofing, crown sealing, and flashing replacement to ensure your chimney is watertight. We also inspect for roofing vulnerabilities since chimneys are tightly connected to the roofline.
3. Damaged or Missing Chimney Cap
A chimney cap protects the flue from rain, snow, animals, and debris. When missing or broken, it leaves the flue exposed to weather and pests.
Fix:
Installing a high-quality stainless steel or copper chimney cap will prevent birds, squirrels, and moisture from entering the chimney. It also keeps embers from escaping and causing roof fires—a vital component of roofing services in Westchester County.
4. Spalling Bricks (Flaking or Popping Brick Faces)
Spalling occurs when the outer surface of bricks begins to peel or flake due to moisture infiltration and freezing temperatures. It weakens the structure and affects appearance.
Fix:
We remove and replace the damaged bricks and apply breathable sealants that allow the masonry to repel water while still releasing internal moisture. If widespread, partial or full chimney rebuilding may be required.
5. Creosote Buildup and Blocked Flues
For homes with wood-burning fireplaces, creosote—an oily, tar-like residue—can build up inside the flue. It’s highly flammable and a leading cause of chimney fires.
Fix:
A professional chimney sweep should clean your chimney annually. We provide inspections, cleanings, and smoke test evaluations to ensure safe operation, all performed by certified chimney contractors in Westchester County.
6. Chimney Flashing Failure
The metal flashing where the chimney meets the roof often corrodes or detaches over time, creating a major entry point for water leaks.
Fix:
At On Time Roofing, we offer comprehensive flashing repair and replacement. As a leading provider of both chimney repair in Westchester County and roofing services, we ensure a seamless, water-tight bond between roof and chimney—protecting both structures.
7. Tilting or Leaning Chimney
If your chimney appears to be tilting or leaning away from the house, this could signal foundation issues, severe water damage, or structural failure.
Fix:
Immediate evaluation is critical. Our structural chimney assessments determine the cause and recommend either reinforcement or partial rebuild, depending on the severity.
Homeowner Insight: Leaning chimneys are not only dangerous but can compromise your home’s entire roofing system.
8. Smoke Indoors or Poor Draft
If smoke is backing up into your home when using the fireplace, it could be due to a blocked flue, closed damper, or insufficient air flow.
Fix:
We inspect the damper mechanism, check for blockages (such as nests), and ensure the flue is the correct height for proper draft. Sometimes, simple adjustments or a flue liner installation solves the issue.
Why On Time Roofing is the Right Choice for Chimney Repairs
- Over 15 years of experience with roofing and chimneys
- Trusted chimney contractor in Westchester County
- Licensed and insured for complete home exterior services
- Free chimney and roof inspections
- Responsive service and long-lasting solutions
Protect Your Chimney—and Your Home
Delaying chimney repairs can lead to serious consequences, from moisture damage to fire hazards. At On Time Roofing, we make it easy to keep your chimney in excellent shape through expert inspections, maintenance, and repairs—backed by a team with decades of experience.
If you need a chimney repair in Westchester County or suspect issues with your flashing, cap, or masonry, contact us at 914-924-4869. We’ll help protect your home with prompt, professional service.
