Certainteed MemBrain Continuous Air Barrier & Smart Vapor Retarder

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Certainteed MemBrain Continuous Air Barrier & Smart Vapor Retarder

by CertainTeed

MemBrain is a patented smart vapor retarder with MoistureSense Technology that helps provide superior moisture management needed in an airtight envelope. In "mixed-climate" parts of the country, where homes heat in the winter and cool in the summer, homes using traditional polyethylene vapor retarders may actually trap moisture in the cavity during the summer - raising the risk of costly moisture and mold issues, structural damage, health consequences and liability. This continuous indoor air barrier* creates a better performing building envelope and it has a dynamic performance and permeance rating compared to traditional kraft insulation or polyethylene sheeting. *When installed with standard tape and sealing practices. MemBrain forms a continuous air barrier system that enhances air tightness and improves overall comfort. For full MemBrain air barrier install instructions, view 30-28-127.
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Product Details
  • Product Brand:
  • Size:
    8' x 100'
  • Additional Information
  • Remains tight in winter when humidity in the cavity is low to prevent moisture from entering
  • Increases permeability in summer to let moisture escape, helping to keep the wall dry
  • Senses and adapts permeance to varying humidity throughout the year to keep the cavity dry
  • Application
    Vapor retarders are required by code in zones 4C and above. However, MemBrain is ideal for any area where the home cools in the summer and heats in the winter.
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