Chimney cleaning removes soot, creosote, and debris from inside the flue—it’s maintenance that should happen annually. Chimney repair fixes structural problems with the masonry, flue liner, cap, crown, or flashing. These are two completely different services.
You might need cleaning every year, but repairs are only needed when something is damaged or worn out. However, during a cleaning, problems are often discovered that require repair. Cracked flue tiles, damaged dampers, or deteriorating mortar joints are commonly found during routine cleanings.
Both services are important for safety, but they serve different purposes. Cleaning prevents fires and ensures proper ventilation. Repairs prevent water damage, structural problems, and dangerous gas leaks. A well-maintained chimney needs both services at appropriate intervals.