Why are plastic vents better?

December 11, 2018 Brendan Ellingham


When is the last time you threw a baseball at one of your roof vents?

We do it all the time.

This is how we learned that when you throw a baseball at your average metal vent, it will most likely become bent out of shape. We also learned that more durable plastic vents won’t bend or break—as demonstrated in the video below.

Along with being virtually unaffected by the impact of a baseball bat, there are a number of reasons for choosing plastic vents over metal vents.

“Some of the metal vents—a lot of people are using aluminum—even when you take the product out of the box, it can curl or bend,” said Donna Burtch, Duraflo product manager at Canplas adding that plastic vents are a lot lighter and easier to install.

“One good reason to choose plastic is safety, because metal has sharp edges,” said Burtch. Metal vents have seams, rivets and welding. These give more potential for water to get in, or for an installer to injure themselves.

Metal also lends to more condensation with temperature changes. This is why in more humid climates such as British Columbia, you will see moss growing around metal roof vents. This also means that the metal will start to corrode and rust.

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