First things first, you must identify how these critters might enter your home or business.
The typical entry points are:
- Broken or open vents beneath the awnings of your roof
- Openings into the foundation of your home or deck
Once you have identified these locations its time to build them out. A strong wire mesh held in place with industrial staples or nails will work. Do not use regular window screen material, Raccoons will tear through that like paper.
In addition to these locations, raccoons will also den beneath decks, in old sheds, in the rafters of barns, and in the rarely used spaces of large warehouses. In cases when the infestation is already apparent it is imperative that you call a professional as raccoons are known carriers of possibly deadly diseases such as rabies.