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My only concern with the larger ones is the weight but I can find a way to raise it. I would rather mount on a steel pole so no rot and no need for raccoon proofing.
The Super Rocket Roost itself weighs 35 lbs. With it mounted on a 4’’x6’’x16’ post, 2 people can fairly easily lift it into place upright into a 3’ deep hole, despite the entire assembly now weighing over 100 lbs. with the post. It will not fall over once in the hole, assuming the hole is not over-dug in diameter (it only needs to be 7’’ or so in diameter). You can paint the pole before lifting it, and use a post protector to insulate it from the ground. These practices will have the pole standing for 30+ years. Raccoons would not fit into the Roost box nor could they reach more than a few inches into the box, so I don’t think they would be a problem. Bats likely would not emerge if there was a raccoon clinging to the post just under the emergence point.
Are you saying with the larger versions and a single post the entire post is pressure treated? And that is not an issue for bat health?
For the Super Rocket, although a full 16’ PT post is used as the base, bats do not actually roost on the PT post. At most they may land on it, but the roost itself is not PT. The Super Rocket Roost sold mostly assembled. To finish it, you would slip it on a post and secure with a few lag bolts, then slip the plastic hull over it. The base of the post should have a post protector slipped over it. The post around the bottom of the roost exit should be roughened up with a utility knife. At that point it could be painted if desired but otherwise lifted into place and cemented.