There are several signs that suggest the need for chimney repair. Look out for: Cracked or deteriorating mortar joints between the bricks. Loose bricks or stones on the chimney structure. Water leaks or stains on the ceiling or walls near the chimney. White staining or efflorescence on the exterior surface of the chimney. Damaged or missing chimney cap or crown. Excessive creosote buildup or a strong, unpleasant odor coming from the chimney. Smoke entering your home instead of being properly vented outside. If you notice any of these signs, it's essential to have a professional chimney inspection and repair done promptly to prevent further damage and ensure the safety of your home.