Flight at dusk and dawn.
Get rid of bats in an attic.
If it gets colder than that the bats in the attic will migrate out allowing you to seal up cracks and other entry points once they leave for the season.
However there are less obvious reasons that could cost you serious time and money.
The ultrasonic bat repelleroffers you an affordable and humane way to get rid of the bats in your attic.
Another method involves the use of mothballs.
In large numbers bats can raise up a racket when coming and going.
Cut the legs off old pantyhose and add a handful of mothballs to the resulting bag recommends nc state s cooperative extension.
Remember to use this wonderful device with a combination of scents and shiny objects to help drive the bats out quickly.
The bats can be expected to depart in a couple of days.
An exterminator will do the best job but this is often too expensive an option for some.
Bats will hibernate in the winter if the temperature stays at around 35 to 40 f.
If you live in an area with mild temperatures throughout the year the bats will stay year round.
The droppings they leave behind can be significant if you have a lot of bats in your house.
Once the bats are gone finish the job by sealing your attic and making sure you clean up all materials once finished.
Since bats can carry rabies you will want to get rid of them if you find them in your attic.