Greetings: I have recent heard that an external stove pipe chimney should have a snow deflector on the roof side of the installation (to prevent a snow slide from taking out the chimney). Are these available from a vendor? If so amyone have a good link? Also, are these required by code or is it just a common sense precaution (i.e. would it pass a building inspection in NY state without it)? Any thoughts here appreciated. Larry S.