We use a bat exclusion system that filters bats out from the attic space or walls of any structure whether its a home, office building, or business. Our one-way door filtration system provides an exit for all bats but does not allow any access for them to return. It is impossible to retrieve all bats by hand since they typically will drop down the wall cavities of your home to find shelter and warmth. An exclusion door system is the only true way to remove the entire colony of bats and to guarentee they can not return. All other possible entry points must be repaired and sealed to ensure they will not come back the following season, bats are very territorial and if all access points are not closed off it is more than likely the colony will come back.