No, it is never normal for a residential chimney to leak during heavy rainstorms, regardless of how intense the downpour or wind conditions may be. A properly constructed and well-maintained chimney system should feature an intact rain cap, sound concrete crown, properly sealed metal step flashing, and waterproofed masonry that work together to keep interior flues and living spaces completely dry. If water enters during rain, it points to a physical defect or failure. You can troubleshoot chimney leaks safely by inspecting flashings and caps. You can verify that your corrective action is successful when repairing cracked crowns, installing a proper cap, and sealing flashing joints ensures your chimney remains entirely watertight during future severe weather events.
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