The Duke Company is proud to carry Insulation Solutions products. For example, Viper® CS IITraditional dirt crawl spaces are full of moisture that enters via evaporation and diffusion through the floor and sidewalls. An important part of a crawl space moisture control strategy is the installation of a vapor barrier. A vapor barrier provides the crawl space with a moisture and soil gas protection layer that decreases the amount of moisture and radon present in the crawl space.


Viper® CS II


Viper® CS II is a crawl space vapor barrier. Manufactured using polyolefin, Viper CS II  is designed to control moisture migration in crawl space applications. Viper CS II has a low perm rating and is engineered with excellent puncture and tear resistance.

 This greatly reduces the risk for:
Mold Decreased Insulation R-Values Dust Mites
Mildew Increased Heating & Cooling Bills Aggravated Allergies
Wood Rot Odors Poor Storage Environment
Floor Failure Insects Poor Indoor Air Quality (IAQ)
Viper CS II is a “Class A” vapor barrier with excellent physical characteristics, including high puncture resistance, high tensile strength and low water vapor permeance. It will prevent ground moisture from entering the crawl space when installed on the walls and floor, greatly reducing the negative effects of a moisture laden crawl space.
When using Viper CS II in a crawl space application, you will be providing the home or building with the best protection on the market! Viper CS II offers several advantages over other crawl space vapor barriers:

Superior Puncture & Tear Resistance

  • Reduces chances of product damage during installation
  • Maintains integrity over time under foot traffic and storage
Super Low Water Vapor Permeability

  • Qualifies as a true vapor barrier (perm rating less than .01)
  • Ensures an effective seal against pressure driven moisture
Extrusion Coated Bright White Finish

  • Provides a bright, clean look for the crawl space
  • Smooth coating allows for easy removal of dirt, footprints and smudges


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crawl space vapor barrier

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