Bats can fit into an opening as small as ½ inch. Therefore any man made structure can have a numerous amount of potential hiding places for Bats The existing entry points and pathways that are currently being used by Bats to access the interior of a building are much easier for other Bats to find now due to staining from the bats oils in their fur, urine and droppings (guano).
Warm Attics are a very common place that Bats attempt to Roost in. However, some other structures that bats find desirable include but are not limited to:
Roof Tiles and Shingles
If Bats have been living in a structure for long then a thorough clean up process is absolutely necessary. Any odors left behind will only continue to attract other bats. Not to mention that bat droppings (guano) are extremely toxic. Bats can carry a fungus known to cause Histoplasmosis. Histoplasmosis is an airborne disease caused by the microscopic spores of soil fungus, Histoplasma Capsulatum, which affects the lungs of humans. It can masquerade as influenza, or with more severe symptoms, be misdiagnosed as tuberculosis. Many infections in humans do not produce symptoms or cause distress. Skin and blood tests reveal the presence of an infection; however, a positive histoplasmin reaction may only be evidence of a previous exposure. The fungus, spores, and possibly hyphal fragments, created by Bat Guano, become airborne and may be inhaled by people who enter contaminated areas where Bats have nested or are Roosting if not sanitized by a trained professional.
Bat Guano and Urine accumulating in Attics, Lofts, and Wall Spaces can attract arthropods such as Roaches as well as other pests. Roaches and other pest nuisances are most likely to become an issue after Bats have been eliminated from the structure, but leave the behind the parasites that were using Bats as their hosts.
Iowa Illinois Termite & Pest Control, Inc. will scope out what kinds of cracks and crevices bats are getting into, decide on a systematic method of sealing these cracks and crevices to exclude them from future use.
The ONLY way to completely exclude Bats from your home or building is to systematically seal the gaps, cracks and crevices. This takes time and patience.