Commissioned by Plegt Vos Oost, A.T.I. Abseiltechnieken has installed exclusion flaps for bats on a number of facades. These flaps guarantee a one-way traffic of animals so they can leave the facade after their hibernation and cannot re-enter it before the demolition of the building. A few locations were difficult to reach for standard aerial work methods, for which applying our abseiling techniques was a good alternative. Our rope access engineers could easily position themselves at the hard-to-reach locations to install the exclusion flaps.