What is the best practice for preventing bats from entering buildings?

Sealing entry points and ensuring proper ventilation is recognized as the best practice for preventing bats from entering buildings. Bats often seek shelter in buildings to roost or give birth, especially in the summer months. By sealing potential entry points such as gaps, cracks, and holes in walls, roofs, and around windows and doors, you effectively block access to these areas.

Proper ventilation is also important as it can help maintain an appropriate indoor climate, making the environment less attractive to bats. It ensures that the building does not become too humid or stagnant, factors that could encourage bats to enter.

In contrast, creating open entry points would directly invite bats into the building rather than preventing their entry. Installing fake nests might mislead some species, but it doesn't address the fundamental issue of entry points. Leaving windows wide open is also counterproductive as it offers an easy passage for bats. Thus, sealing entry points and ensuring proper ventilation is the most effective method to keep bats out of buildings.