I have a 1928 vintage boathouse in northern WI with a clay tile roof and a finished cathedral ceiling in the second floor and want to insulate the 2" roof cavity between the finished ceiling and the wood under the tiles - the purpose is to discourage/eliminate the ability for the bats to get into that cavity. The cavity is accessible by removing the fascia boards along the edge, but then whatever foam is used must be blown in about 17' up to the peak. There are no fire breaks and the roof tiles are mounted on wood with sleepers 16" apart, so it may require a long hose or wand to insert insulation. Any suggestions? The boathouse is not heated or used in the winter, and the desire is to insulate the void to keep bats from occupying it in the summer.