Anybody have any solutions for keeping bats from flying behind house shutters. Every summer we seem to get a bats here. These shutters are on the patio and along side the pavements which we use on a daily basis. I do not like sitting on the patio at nite due to this. A bat actually flew out from behind the shutter on the patio today as I was grilling. The shutters are attached to the brick by a piece of wood at the top and bottom so the whole space between is open. Is there any pest sprays that we could spray on the brick to keep the bats from flying in there. I know the only other solution would be to enclose the area behind the shutter. Looking for any suggestions besides having to enclose the sides of all the shutters.