What does a collar in roofing refer to?

A collar in roofing specifically refers to a flange that seals around a vent pipe. This component is crucial in ensuring that the area where the vent penetrates the roof is watertight, effectively preventing leaks. The collar is typically made from materials that can withstand the elements and provide a secure fit around the pipe, creating a barrier against moisture and water intrusion.

In roofing systems, proper sealing around vent pipes is essential because these areas are particularly vulnerable to weather damage. Without an adequate collar, water can seep through the roof around the pipe, leading to potential structural damage and costly repairs. Therefore, understanding the role of a collar in sealing and protecting vent pipes is fundamental in roofing practices.