Identifying Chimney Discoloration

Unsightly staining and discoloration can ruin an otherwise beautiful chimney. The presence of these stains does not only affect the look of your chimney; it could also be an indication of more serious problems.

Today, we discuss the possible causes of chimney discoloration.

White or Gray Stains

Efflorescence is usually indicated by a powdery white or gray stain on your chimney. When water evaporates, it leaves a small amount of minerals on your chimney, causing efflorescence. Rain and snow can cause some efflorescence in areas that receive a lot of precipitation. However, if you notice a lot of efflorescence on the inside of your chimney, it could mean that water is getting into the material. This water can cause leaks and other structural damage to your chimney over time. It is critical to address the issue before it worsens.

To prevent discoloration or, worse, a fire, you should call a chimney sweep or contractor specializing in such issues. Chimneys are crucial to letting smoke, toxins and dangerous fumes escape your home. Your house can be freed from these dangerous substances by maintaining a clean chimney. 

Dark Green Stains

Algae growth causes dark green stains or discoloration on the outside of the chimney. This type of discoloration is common in areas where water pools or flows consistently. Furthermore, it can happen on a chimney where the chimney crown doesn’t have an adequate overhang. Since it is difficult to distinguish between dark green algae stains and brown or black soot stains, a chimney inspection is usually required to determine the source of the discoloration.

Red Stains

If a red stain appears on the side of a chimney, it means rust. Metal chimneys or chimneys with metal caps are usually the ones that suffer from this problem, which results from exposure to water. Repairing rusted chimneys is important to prevent leaks.

You don’t have to live with discoloration on the sides of your chimney simply because everything seems to be working fine. Chimney Doctors offers chimney relining, inspection and repair services. Call us at (518) 882-5009, or fill out our contact form to schedule an appointment. We serve clients in Clifton Park, NY, and nearby areas.