While encapsulation is an important part of creating a healthy crawl space, encapsulation alone is not enough on three fronts.
First, the crawl space must be free from water leakage. Whether you have a leaky crawl space or a potentially leaky crawl space, you must address this problem before encapsulating. Water leaking onto the plastic barrier would create a multitude of other problems, so waterproofing must indeed be done first.
Secondly, encapsulation is necessary to reduce the unwanted elements such as water vapor and soil gases. Encapsulation involves not only covering the dirt floor, but covering the foundation walls to grade, including sealing seams and protrusions; it is far superior to a loosely placed, unsealed, thinner vapor barrier.
Thirdly, once the water problem is eliminated and the elements are sealed out, both from the soil beneath and the air from the outside, keeping the air clean and dry is essential for creating a healthier environment.
For more information about encapsulation and creating a healthier home contact your local B-Dry®.