It is most often due to construction related issues.
Bats need an opening as small as ¼ inch x1 inch to enter a structure. Chewing animals such as squirrels can create openings in sofit and fascia materials, in addition animals such as woodpeckers can bore holes in siding sofit and fascia that bats can use to enter the structure. However, post construction related openings account for the vast majority of bat entry points year in and year out. Deflection in the structure due to aging materials, poor workmanship, A new roof due to hail, repair from fire damage or ice dam issues, wind damage. READ MORE…