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When bats get in your attic, it is usually not easy to get them out. The process can be long and complicated and it is best that you get a professional to handle the situation for you. If you have time on your hands however, you may attempt to do it yourself. Here are some pointers to what you would need to do:
For more information, you may want to click on one of these guides that I wrote:
How much does bat removal cost? - get the lowdown on prices.
Example bat removal photographs - get do-it-yourself ideas.
Bat job blog - learn from great examples of bat jobs I've done.
Identification of entry points
The first thing is to solve the mystery of how exactly the bats are getting in. Most times, it is through the gaps nears the edge of the roofline. A useful tip is that entry points usually have brown stains from the grease and the oil in their fur.
After caves, bats generally like to roost in attics and many times, the colonies are actually maternity colonies that comprise females after having given birth in the summer. Bats can stay in the same place all year so long as the place is conducive enough and each summer they’d just keep growing in population until the situation results in an infestation.
Another thing is to know for sure that the animals in your attic are bats via the kind of noise they make. Even though bats are generally quiet and nocturnal, a large number of bats would create a loud noise and you can identify them by their squeaks and flutters. Most of the noises are made at dusk when they fly out to forage for food.
To further confirm that you have bats, you may check for their guano or droppings. The odor of the droppings in large amounts can contaminate the attic and cause lung disease for occupants living in the house so you would need to be careful.
They do not like cold places so if your attic is warm, they would return each spring. Sometimes the young bats crawl and fly into the house due to inexperience and this is another way to identify them.
After identifying entry points and knowing for sure that bats are in the house, the best way to get them out of the attic is through exclusion. Exclusion allows for the bats to exit through a means but not to get back in through that means. There are different kinds of exclusion devices: