What is a common sign that indicates a blocked chimney?

A common sign that indicates a blocked chimney is smoke entering the living space. When a chimney is functioning properly, it draws smoke and gases from the fireplace up and out of the home. However, if there is a blockage—such as creosote buildup, debris, or an animal nest—the natural flow of smoke is disrupted. As a result, smoke will not escape through the chimney and instead will vent back into the living areas, creating a dangerous and uncomfortable environment.

This situation not only poses a risk of smoke inhalation but also increases the potential for chimney fires due to the accumulation of flammable materials. Recognizing smoke entering the home as a sign of a blockage prompts immediate action, such as ceasing to use the fireplace and contacting a professional chimney sweep for inspection and cleaning to ensure safety.