How To Install Encapsulated Crawl Space. Clean it off using a stain solver. Most crawl space encapsulation contractors won't agree to seal in an area with a combustion appliance unless it's a sealed unit.
A conditioned crawl space is also sometimes called a closed, sealed, unvented, or encapsulated crawl space. If you're still in the design phase and you can't eliminate the crawlspace (by making it a basement or a slab), at least make it tall enough that you can easily move around down there. Crawl space encapsulation costs and installation factors.
The cost may be as high as $30,000 on.
Foundation waterproofing costs an average of $5,500. Homeowners that have dry crawl spaces are certainly not convinced a sump pump is necessary or even a dehumidifier. Crawl space encapsulation works great when you’re dealing with such issues as ground moisture and humid air. If you’re looking for overall costs, estimates for total cost to encapsulate crawl space starts at $2,000 and may reach up to $15,000.