The problem with plastic ridge venting is the ridge venting starts wraping and cracking with age. Most of the other fiber style ridge vents are easy for ctitters such as squirrels and mice to chew or tear our allowing easy access for bats and birds to enter the attic as well.

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The old way to " fix " the problem: Tearing off the ridge cap, removing the ridge vent, installing metal mesh, then installing ne wridge vent is more expensive.