Harboring pests in your home isn't just a nuisance, but it can cost you lots of money. It is critical to monitor your pest situation on an ongoing basis.
Even the best preventative measures may not be enough and an invasion can begin.
Once a month, walk all around the exterior of your home checking for possible entrance points. Hairline cracks in your foundation likely won't be big enough to allow entry for mice or rats, but carpenter ants and smaller insects can easily invade through them.
Cracks and crevices are usually easily repaired using simple caulk. It's pretty inexpensive and easily obtained.
For homes with an air conditioning unit, the pipes have to enter the house somehow, so the entry point will need to be properly sealed. This is one of the most common ways that pests enter the home.
Many times, the seal around the air conditioning pipes are poorly done and will easily erode. You can't repair the problem with just anything though. Rats can easily chew