The following is a group of photos that have been found to be common entry points for snakes entering homes and buildings in the United States. As you can see these entry points are not limited to foundations, they can be on the sides of the house, on the roofline of the house and even in the attic area of the house. Most snakes that enter homes and buildings are often snakes that have the ability to climb.
The most common snake that is found in homes and buildings in the eastern part of United States would be the black rat snake.

If you have a snake in your home and need professional help, simply select the state you live in on the right hand side and then the area the closest represents where the problem is located, then call the number listed on the page! Its that easy! This is a very solvable problem with methods and products used in todays industry.