The job involves many cases of clear caulking and the sealing of every nook and Gap all around the roof and windows. This includes the ridge of the metal roof and all the soffit gaps. This is a job that, in my case, will take all day. What the company also does is install exit tubes where the bats have been entering and exiting. This will allow the bats to get out but not back in. The tubes stay in place for a couple of weeks to ensure all the bats are out. Then the tubes are removed and the final holes sealed up. The Little Brown Bat is suffering a serious decline as a result of white nose syndrome. This is the main reason for this method of extraction which doesn't kill any of the bats.
Once the house is sealed up you need to ensure that it remains sealed year after year as the bats are imprinted on the house and will always attempt to return to it to live. I would prefer they did not. The company doing this job is a general critter removal company but they specialize in bat removal and have over 18 years experience doing so. I'll be happy to have this completed today so I can properly lag my TV tower to the attic wall when I install it in a couple of weeks.