Better Air Quality – One of the major reasons for crawl space insulation in Michigan is due to air quality. When your home has inefficient or no insulation, there is no telling what is coming inside. Your crawl space becomes more susceptible to not only critters but pollutants as well. When dust, dirt, pollen, mold spores, and other pollutants are allowed to enter, the air quality of your home is compromised. For those who have respiratory issues already, it can make life at home a lot more difficult.