An attic ventilation baffle is a type of ventilation system that helps introduce air from outside the home into the attic to create air circulation. The baffle acts as a channel that aids in the ordered circulation of air in an attic space and is generally made using polyvinyl chloride.
Other materials that are used to make attic ventilation baffles include cardboard and rigid foam board. A baffle is easy to install in an attic, as it only requires a few staples to hold up. An attic without proper air circulation faces the risk of moisture build-up, increasing the risk of rotting wood.