North Carolina Building Contractor License Practice Exam

If the horizontal width of a chimney is greater than 30 inches, what feature helps prevent ice and snow buildup?

1. Flashing

2. A cricket

3. A chimney cap

4. Ventilation

The correct answer is: A cricket

A cricket is a small, sloped structure that is built on the roof just above a chimney to direct water away from the chimney and prevent the accumulation of snow and ice. When the width of a chimney exceeds 30 inches, this added feature becomes particularly important because larger horizontal surfaces tend to trap more snow and ice. By aiding in the drainage of melting snow and directing water away from the chimney, a cricket effectively reduces the risk of ice dams, which can lead to leaks and other water damage. In contrast, flashing is used to seal the joints between the chimney and the roofing material to prevent leaks, but it does not actively address snow and ice build-up. A chimney cap is designed to protect the chimney from debris and animals while also preventing downdrafts, but it does not influence snow and ice accumulation. Ventilation helps to promote air circulation, which can assist in drying out moisture but is not a preventive measure for snow or ice accumulation around a chimney.