This crawl space has a full-size door as an entry, this creates a large gap in the insulation on the crawl space walls, and it is not airtight. Regardless of how large the crawl space door is, this is always a concern when encapsulating. This is why we always installed a custom friction fit door behind every exterior crawl space door. It meets code by filling the gap and ensuring a continuous R-10 of insulation on the crawl space walls and also air seals. Keeping as much air carrying moisture as possible out of the crawl space.