Quick Answer: Signs Your Chimney Needs Repair The top five signs your chimney needs repair are white staining (efflorescence) on bricks, cracked or crumbling mortar joints, a damaged chimney crown, rust on the firebox or damper, and spalling or flaking bricks. If you notice any of these, schedule a professional inspection before the damage spreads. Key Takeaways Most chimney damage starts small and invisible. Hairline mortar cracks and minor crown damage can escalate into thousands of dollars in structural repairs if left untreated for even one season. Water is the number one enemy of your chimney. Over 90% of the…










