Get rid of bat? We have bat who like to roost contained by the shutters?...

We have bat who like to roost contained by the shutters? I have no desire to massacre them, but they keep coming put a bet on, even after numerous attempts to scare them away, such as smoking them out, etc.
Answers:    They enjoy sound machines that ooze a noise that will keep hold of the bats away. I hold forgotten where we bought ours but they really work.
give the name batman-lol--sorry couldnt pass that one up--use small cumbersome mesh wire and cover entrance hole-if you dont you going to hold a heck of a mess with bat poop-watch them they will give up the nest at a certian time in evening-then cover hole not to trap any inside