How to Install a Vapor Barrier with Wall Insulation
Photo Credit Seaside Crawl Space
The vapor barrier goes over the insulation.
When installing a vapor barrier and foundation insulation in a crawl space, use this diagram to make sure it is done correctly.
To get the most out of the SilverBack® vapor barrier and foundation insulation, be sure to install them both correctly. This diagram illustrates how to properly install them in a crawl space.
Click this link to learn more about crawl space insulation.
Installing the vapor barrier in the crawl space over the insulation will prevent holes in the barrier from securing the rigid foam to the wall. It definitely should go without saying that the holes would not be a good thing.
The rigid foam will not absorb moisture. However, please be aware that spray foam is not the same as rigid foam. The spray-on version will absorb moisture, and that moisture will lower its R-value.
Learn more about crawl space encapsulation and get familiar with everything needed for encapsulating a crawl space. Both this website, along with CrawlSpaceRepair.com, have several different resources that can help with the process, as every step of the process is important. DIY crawl space projects are not nearly as difficult as people may think when they have the right resources.
