What is a common sign of a chimney that needs immediate attention?

Smoke escaping from joints is a critical sign that a chimney needs immediate attention because it indicates a failure in the system that could lead to dangerous conditions. This scenario often points to issues such as insufficient sealing or damage in the chimney's structure, which can allow smoke, and possibly harmful gases like carbon monoxide, to enter the living space of a home.

Addressing smoke escaping from joints promptly is essential for safety, as prolonged exposure to these gases can lead to serious health risks and fire hazards. Detecting this smoke during operation suggests that the chimney is not functioning properly, likely due to blockages, cracks, or improper installation.

In contrast, other signs such as user complaints about loud noises, unburned fuel in the fireplace, or cold spots near the chimney can indicate maintenance issues but do not necessarily imply an immediate danger to occupants or a malfunction that could rapidly escalate into a more severe problem. Therefore, recognizing smoke escaping from joints as an urgent issue is vital for any chimney maintenance and repair practices.