Proper installation of the crawl space vapor barrier is critical to achieving long-term moisture protection. Correct sealing, overlapping, and layout effectively prevent moisture intrusion, mold growth, and wood decay. Adhering to established best practices helps maintain stable indoor air quality, reduce energy consumption, and safeguard the structural integrity of your home year-round.

PREPARATION 

Remove debris from crawlspace.

INSTALLATION 

1.Turn RGM-BW-CS Vapor Barrier up the foundation wall to a minimum height of six inches above the outside/exterior grade or in compliance with local building codes and terminate with bars. To form a complete seal, apply RG JIAYE Tape to the foundation wall prior to installing the bar.

2.Seal RGM-BW-CS Vapor Barrier around all penetrations and columns using RG JIAYE Tape.

3.Place RGM-BW-CS Vapor Barrier directly over the crawlspace floor. Where consistent with local code, if rigid insulation is to be used, install RGM-BW-CS Vapor Barrier prior to insulation (under insulation and between the foundation wall and insulation).

4.Overlap seams a minimum of six inches and seal with RG JIAYE Tape. Some codes require a minimum of a twelve inch overlap. Check appropriate codes prior to installation.

5.No penetration of the liner is allowed except for reinforcing steel and permanent utilities.

6.Repair damaged areas by cutting patches of vapor barrier, overlapping damaged area inches and taping all sides with tape.