I've trimmed my trees so no squirrels can get on the roof however there is a tree on neighbor's property that they can jump from. but I've seen wood peckers go at it too, being made of wood. this is the 2nd time it's been damaged by squirrels and / or wood pecker. how do you squirrel / wood pecker proof it? I put hardware cloth right behind it after the 1st time, so the critters can't go in, but they still try & so, damage the wood outside. I'm thinking METAL, any ideas what that runs cost wise?