When must chimneys be provided with crickets?

Chimneys must be provided with crickets when the dimensions parallel to the ridge line exceed 30 inches. This requirement is included in the North Carolina Residential Code to address the potential for water pooling around the chimney, which could lead to leaks and roof damage over time.

Crickets, also known as saddles, are designed to divert water away from the chimney, preventing the accumulation of debris and promoting proper drainage. When the width of the chimney is substantial, such as being greater than 30 inches, it is more likely to obstruct the flow of water, thus necessitating the implementation of a cricket for effective water management.

Understanding this code provision is vital for ensuring the integrity and longevity of roofing systems in residential construction. This regulation helps maintain the roof's health and minimizes maintenance issues that can arise from improper water drainage around chimney structures.