My mom's house had a ladybug problem. When I was researching control methods I learned that wherever they congregate, they deposit a pheremone (kind of a bug perfume) that tends to attract more ladybugs. The more ladybugs attracted, the more pheremone deposited, and in a few years they can be thicker than hairs on a dog's back.
We got rid of the problem. Sold the house.
2011 Dodge Ram 1500 HEMI Quad Cab
2011 Jay Flight 26BH