Is My Historical Chimney Worth Repairing?

Historic homes are a vital part of American history and should be preserved for future generations to enjoy. From the quaint Harriet Tubman Home in Auburn, New York, to the ornate 165-room Hearst Castle in San Simeon, California, each property leaves a lasting mark that withstands the test of time. Whether you are restoring an older residence showing signs of wear and neglect or updating a historical chimney to meet modern building codes, many property owners often wonder, “Is my historical chimney worth repairing?”

To Repair or Not to Repair

Fortunately, in most cases, repairing is certainly worth it. Since historical chimneys are difficult to replicate today, preserving the original structure maintains their soul and authenticity. On the other hand, a total rebuild is usually necessary when the foundation has failed or the masonry is physically crumbling to the point of structural instability. Before beginning any repair work, you will need to have a Certified Chimney Sweep® inspect the chimney and foundation to determine whether repair is feasible.

Tips for Repairing Historic Chimneys

• Schedule a Level 2 Inspection: Hire a CSIA-certified professional to conduct a Level 2 inspection, including a video scan of the internal flue. This reveals hidden cracks that could lead to leaks and other hazards. Depending on the findings, the sweep may need to conduct a more extensive level 3 inspection.
• Review the Inspection Report: The sweep’s report will list any issues discovered and the repairs or component replacements needed to restore the chimney to comply with today’s building codes. The work involved and the estimated repair costs will help you determine whether your historical chimney is worth repairing.
• Use Historically Compatible Mortar: Never use Portland cement on pre-1940s bricks. This cement is much harder than in the past and will cause the softer historic bricks to crack. A skilled mason will use a lime-based mortar for historical chimney repairs.
• Opt for Less Invasive Methods: Our spray-on liners and coatings are a much less invasive process for repairing chimney liners, crowns, and waterproofing aging brickwork.

We Have Solutions for Historic Chimney Problems

Historic chimneys face unique challenges due to age, weather, and outdated building standards. Here are our solutions to fix these common issues:

Waterproofing Historic Chimneys

Historic bricks are porous and absorb water like sponges, leading to cracking, crumbling, and spalling. RainTite® is a vapor-permeable water repellent that penetrates deep into the masonry. Unlike “sealers” that trap moisture inside (causing the brick to continue deteriorating), RainTite® allows this trapped moisture to evaporate while providing a protective shield against rain, ice, and UV damage.

Chimney Liner Repair

Most historic chimneys were built without a liner or have a clay liner that has reached its life expectancy. Thermocrete® is a spray-on ceramic coating that fills every crack and void with a durable, heat-resistant surface. It strengthens the stack and creates a seamless path for exhaust to vent without the need to remove an old liner or install a new one.

Parging Corbeled Brick Smoke Chambers

Older chimneys often have stepped or jagged bricks in the smoke chamber that create turbulence and trap flammable creosote. SmokTite® is a refractory ceramic coating that creates a hard, seamless surface, improves draft, and adds a critical layer of thermal protection between the fireplace heat and the historical home’s wooden framing.

Repairing Chimney Crown Cracks

The crown is an essential component at the top of the chimney that protects the interior masonry walls surrounding the exposed flue pipe. If it’s cracked, precipitation will leak into the structure, causing extensive water damage. EverCrown® hardens into a flexible, rubber-like barrier that seals minor cracks and gaps, protecting the crown against moisture intrusion.

Historical Chimney Repairs Near Me

The Approved Industries family of products goes on gently but hangs on tight, making them ideal for repairing most older and historical chimneys. Our advanced spray technology hardens into a smooth, heat- and moisture-resistant ceramic surface without affecting the original structure’s aesthetics. See why chimney and hearth professionals trust Approved Industries. Visit our website to find a certified pro near you and browse our complete line of advanced ceramic coatings.