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Why Do I Have a Discoloration on My Chimney?

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Your chimney is not only used for heat and comfort, but also aesthetics and beauty. Just as a chimney can save homeowner’s money in utilities and add value to the property, it can just as easily decrease the value if it’s neglected or damaged. When your chimney becomes discolored, it becomes obvious there is a problem. Oftentimes, the color can tell you what the problem is.

Stains on the Exterior

White Stains – When water passes through the masonry, it leaves behind minerals like water molecules. If you have white stains on the exterior surfaces of your masonry chimney, your chimney is being affected by water. This is especially common in ocean regions where there are a lot of salts in the air, such as in our service area.

Red Stains – Red stains are common toward the top of the masonry chimney. They are a result of a corroded and rusted chimney cap. A damaged chimney cap may allow water inside, allowing the rusty water to run down the chimney face.

Stains on the Interior

Green/Black Stains – Noticeable stains on the inside of the chimney system are often a result of water damage. Greenish/black stains are a direct result of mold and mildew. The bacteria and spores are likely present in the air and affecting the quality of the air you breathe.

Black/Brown Stains – Caused by soot and creosote, these common stains are mostly found in the firebox. A regularly cleaned and maintained fireplace will not stain. Soot stains may be an indication of a dangerous overproduction of carbon monoxide in the chimney.

Stains on the masonry are not the only kinds of stains that may indicate a dangerous hazard. If you have any type of heat appliance including gas fireplaces or electric heaters, you should be aware of the surrounding space. For instance, if the wall near your heat appliance appears discolored, the heat is affecting it. Most of the building materials that make up your home are flammable, including wood, insulation, wiring, wall coverings, and window treatments. When heat affects the area around the appliance, it still weakens the beams and materials over time, drying them and making them brittle while increasing their fire risk.

No matter what the discoloration or where it occurs, it indicates a problem. If you have noticed a change in appearance, a stain, or otherwise discolored area of the chimney’s masonry or area nearby, you should call a professional for an assessment. Hudson Chimney provides important services such as chimney inspections that can keep your family safe. Remember to schedule your inspection annually, especially if you notice a change or a problem in your system.

Call Hudson Chimney at 904-282-4159 or contact us online!