My friend put the two telephone poles in the ground today to hold the large bat house I built him. He said the poles were 30 foot tall and he put about 5 foot in the ground. Other then safety concerns with weight, wind etc. Is there a reason you would not put the house 20-25 foot in the air? He is going to build some braces and a pulley system across the top of the poles to lift the house. Is higher always better as far as the bats are concerned. It is in an open area of his yard were trees etc. are not an issue and the poles will be facing southeast and catching a lot of morning sun.
Thats good info. I probably won't be around when he mounts.I told him to get the bottom at least 15 foot up but he made the comment that since he will have the pulleys he could put it all the way to the top just as easy as he can put it 15 foot up. I didn't think it would matter but again I don't want to have to move this beast, it is going to be a permanent structure. Hopefully the first location works out.