Are you starting to see a white powder form on the exterior of your chimney? This residue is called efflorescence, and it’s not uncommon for homeowners to think that this is just a sign of an aging chimney. However, it’s a sign that your chimney needs an inspection, and the professionals at Chimney Champions want you to know that efflorescence should not be ignored. In fact, it could be a sign of a larger issue with your chimney, and definitely should be inspected. Here are several facts you need to know about this white, powdery substance appearing on your stack.