Bats in Canada are insectivores and rarely bother humans. However bats will sometimes fly into a house to find warmth in the winter. This can be a frightening situation but the best thing to do is to leave the opening they entered through, like a window or a door, open for them to leave and that is generally what they will do. Having a bat enter an attic is much harder to realize. They are nocturnal so are only active at night and they do not make a lot of noise. If you have a bat in your attic then you may not even know it yet. The only way to tell is if you are hearing squeaking sounds which can easily be mistaken for mice. The difference between mice in your attic and bats is that mice will enter the attic through the house. Bats will enter the attic through a hole in the roof. This one can be already present like a warped or raised roof edge or can be one they made like a wall vent they broke through. Either way, the bat will live in the attic for as long as it is unnoticed. Will breed and make a family who will defecate and urinate on the insulation and will cause serious damage to the attic space. That is why it is a good reason to inspect your home and your roof frequently, especially during bat mating season which occurs in the late summer and early fall. If you discover that you do have a bat in your attic there is not much you can do about it on your own. Unless you have roofing experience and even then, how do you get it out?
The process for getting wildlife out of your home is with something called a one-way door. It’s a device made for getting squirrels, rats and other small animals like birds and bats out of your attic, or out from anywhere, they are living. Larger animals like skunks and raccoons can also be evicted using a one-way door but the type of door used is different, more complex and more expensive to make or buy. The basic process is to attach a one-way door to the main entryway the animal used to get inside. This could be anything like a soffit roof intersection or a broken or chewed-through roof vent. You can attach the one-way door with some steel mesh and bolts to make it secure. It has to be very secure as the animal will try to get back in through it and may even try to rip it off. Once it’s on and secures the animal will be forced to vacate or starve to death, being as no animal will willingly starve itself to death, it will vacate. This is a big procedure and is very dangerous. Do not do this yourself if you can afford to hire a professional. Even with roofing experience the work is not like roofing and takes years of training. Call a professional as falling off a roof can be a deadly experience.