One of the concerns about installing a sealed vapor barrier or encapsulating a crawl space is what do do to allow access for termite and other pest inspections or treatments. Pest control companies need to be able to both inspect and treat areas under your home so must have clear access to areas where floor joists and wooden sill boards meet the concrete or block structures.
This is the reason that all of our vapor barriers and foamboard insulation panels always stop at least three inches from any wooden structure. This allows pest companies to both inspect and treat any possible problems. In general encapsulating or sealing your crawl space reduces the number of pests (both insect and rodents) under your home by removing moisture and eliminating habitat.