The 2 most common bats that we deal with here in PA are the little brown bat and the big brown bat. Both are equally as good at getting into our houses. Bats play a vital role in our environment. Studies have shown that 1 little brown bat will eat up to 1000 mosquitos in the 1st hour of flight each night. And sometimes more than 2000 in 1 night. That is a lot of bugs!
Both little brown bats and big brown bats only need around a 3/8-5/8-inch hole or gap to be able to get into your house. They will find areas along the soffit and fascia, gaps around dormers or other roof junctions, ridge vents and many more. Knowing where to seal and how to seal each spot takes years of experience. Also, when to seal them is another big issue. Here in PA, we have a blackout period from May 15- the end of July. This is the time when females will be taking care of their young, which are unable to fly for the first few months of their life. If exclusion work is done during this time. The adults will not be able to reenter the house leaving the young helpless. It will even cause the adults to look for any possible entry to get back to them. They might even hang on window screens, enter through open doors and windows. They know no limits when trying to get back to their young. Also, the young will not just sit around and wait. They will look for a way out. With everything now sealed to the exterior of the house they will often find a way down into the living space. This is the last thing you want. When dealing with bats it is important to work with a company that will take the proper precautions for your safety and the safety of the bats.