Rodent Rats Mice Mouse Exclusion(block holes house use to get in the building) is an important rodent control technique. It will get rid of the rats by making it difficult for them to enter the home or structure. Rats are easier to exclude than mice because rats a typically larger. Rats can be a problem in the home. Unfortunately, you may not see them until there is a big problem and it becomes more difficult to get rid of the rats. Rodents can cause a great deal of damage, contaminate food, and carry disease. Fortunately, there are ways to effectively kill the rats, with the two best ways as traps including both open and enclosed rat traps and baits.
http://ampmexterminators.com/ Rodent will destroy insulation in a crawlspace. Depending on the magnitude of Rodent infestation to where the crawlspace .
How rats mice get in the house