Quote Originally Posted by KMG View Post
Get an insulating foam like Great Stuff and fill the tree with it. It can then be trimmed, sanded, and painted if need be. These types of foam does expand a good bit so go slow so you don't waste it and make a mess.

http://www.amazon.com/GREAT-STUFF-Fi...ds=great+stuff
Brilliant! Thank you. I'll see if I can find some tomorrow

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