STX, so just seal the wood seams with flashing, seal the flashing, then coat the roof with roof tar?
Yes, I did not want any wasp, yellow jackets or bees to get in the blind. I sealed the flashing with the roofing tar/coating also on the corners and edges of the blind after I painted it OD green. I had sliding plexiglass windows also. The walls were plywood and the door was an old home door. The only thing that hurt the blind was after about 15 yrs woodpeckers made a hole in the door when the blind was not used for several years. Owls made a mess of the inside. Had the hole not been in the door the blind might still be there today(with some additional painting it at some point years ago).
I would make sure to get the roof on with two thick coats.