Moistop Ultra® 15

Moistop® Ultra 15

Moistop Ultra 15 represents a new standard for concrete underslab products. With a water vapor permeance of .01 perms and a tensile strength and puncture resistance that outperforms even thicker membranes, Moistop Ultra 15 exceeds ASTM E-1745-97 Class “A”, “B” and “C” requirements for underslab vapor retarders. Manufactured from ISO certified virgin resins through a unique process, Moistop Ultra 15 is extremely durable and puncture resistant.

Moistop Ultra 15 is economically engineered to deliver a superior level of performance at a comparatively low installed cost. The product not only stands up to the most rugged jobsite abuse, it is also resistant to degradation from burial – delivering life-long protection from unwanted moisture vapor migration through concrete slabs. The product is an integral component in the Fortifiber Building Systems Group’s Moisture Control System for flooring, and engineered to address commercial applications.


  • Exceeds ASTM-E-1745 class "A", "B" and "C" standards
  • Exceptional Tear Strength
  • Puncture Resistant


  • 144" x 163

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  • Data Sheets

    Moistop® Ultra 15 Data Sheet Click to download  

    Architectural Specification Sheet Click to download  

    Moistop® Ultra 15 Safety Data Sheet Click to download  

    ForeSight Green Building Information Click to download  

  • Install Guides

    Moistop Ultra and The Boot Click to download

    Moistop Ultra Combined Details Click to download

    On Grade Vapor Retarder Click to download

    Below Grade Vapor Retarder Click to download

    Between Concrete Base and Finished Slabs Click to download

    Concrete Capped Crawl Space Click to download

    Expansive Soil Environment Click to download

  • Warranties

    Standard Warranty Click to download

  • CAD Drawings

    Ultra CAD Drawing cad