Squirrel damage to a cedar shake roof in Portland, Oregon Posted March 10th, 2009 by Patrick Morin & filed under Animal Damage to roof, Cedar Shakes, Roofing. The Adobe Flash Player is required for video playback.Get the latest Flash Player or Watch this video on YouTube. You may have wondered how squirrels got into your attic. They’ll chew their way through the cedar shakes and make nests in your attic. Would you like us to come have a look?