Cetainteed MemBrain Vapor Retarder - All Sizes

CertainTeed's MemBrain™ Continuous Air Barrier & Smart Vapor Retarder is a vapor retarder sheeting intended for use with unfaced, vapor-permeable mass insulation (fiber glass and mineral wool) in wall and ceiling cavities.

MemBrain Continuous Air Barrier & Smart Vapor Retarder is a unique product that acts as a vapor retarder sheeting for use with unfaced, vapor-permeable mass insulation. It is a polyamide film that changes its permeability with ambient humidity conditions to provide a continuous air seal. With high resistance to water vapor in winter, it reacts to relative humidity by altering pore size, allowing water vapor to pass through it. This transformation permits drying to occur, in either direction, through the process of vapor diffusion. When installed with standard tape and sealing practices, it creates an air barrier that has been tested under stringent performance guidelines. This product can be used in place of traditional vapor retarders with unfaced fiber glass insulation to provide an insulation system that is ideal for severe climate conditions.

Key Features

• Provides a continuous air seal and vapor retarder function
• Increases to greater than 10 perms using the wet cup method
• High resistance to water vapor in winter, yet allows vapor diffusion for drying in both directions
• Suitable for use with unfaced, vapor-permeable mass insulation (such as fiber glass and mineral wool) in wall and ceiling cavities
• Ideal for use in severe climate conditions with high temperatures and humidity

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Frequently Asked Questions

What is MemBrain Continuous Air Barrier & Smart Vapor Retarder? MemBrain is a polyamide film that acts as a vapor retarder sheeting and air barrier in wall and ceiling cavities. It changes its permeability with ambient humidity conditions, all while providing a continuous air seal.

How does MemBrain work? MemBrain reacts to relative humidity by altering pore size, allowing water vapor to pass through it. When conditions change and relative humidity increases above 60%, the pores in the material expand and its permeability increases. This transformation permits drying to occur, in either direction, through the process of vapor diffusion.

Can MemBrain be used as an interior air barrier system? Yes, MemBrain can be installed as an interior air barrier system combined with recommended tapes and sealants.

What is the permeance of MemBrain? The product’s permeance is 1 perm or less when tested in accordance with ASTM E96, dry cup method, and increases to greater than 10 perms using the wet cup method.

What are the benefits of using MemBrain? MemBrain provides a continuous air barrier, allows for seasonal drying potential, and supports the drying process, therefore decreasing moisture accumulation within the construction and potential moisture damage.

How is MemBrain installed? MemBrain is installed with standard tape and sealing practices.

What sizes does MemBrain come in? MemBrain is available in rolls of various sizes, ranging from 100 sq. ft. to 1200 sq. ft.

Can MemBrain be used with any type of insulation? MemBrain is intended for use with unfaced, vapor-permeable mass insulation such as fiber glass and mineral wool in wall and ceiling cavities.

Customer Feedback

The CertainTeed MemBrain Continuous Air Barrier & Smart Vapor Retarder is an innovative and effective solution for improving building envelope performance and preventing moisture-related issues. Its unique permeability feature makes it ideal for use in various climates, allowing it to adapt to changes in humidity levels and promote proper drying. The product's ability to function as both a vapor retarder and air barrier provides reliable protection for insulation and construction materials, ultimately increasing the longevity and energy efficiency of a building.

Insulation4US.com offers a wide range of sizes for the CertainTeed MemBrain Vapor Retarder, making it easy to find the perfect fit for any project. The product is also straightforward to install with standard tape and sealing practices, which can save both time and money during the construction process.

Overall, the CertainTeed MemBrain Continuous Air Barrier & Smart Vapor Retarder is an excellent investment for any building project, providing long-lasting protection against moisture and air leaks. With the added convenience of being available in all sizes, it's an ideal solution for contractors, builders, and DIY enthusiasts alike.