Introducing the CertainTeed MemBrain 10 ft. W x 100 ft. L x 2 mil Air Barrier and Smart Vapor Retarder Roll — a powerhouse solution for modern homes. This single roll covers about 1,033 square feet, giving you a continuous air barrier and humidity-responsive vapor control across attics and walls, with a convenient 10 ft width and 100 ft length.
Smart, humidity‑responsive vapor control: MemBrain isn’t just a vapor barrier. It’s a smart vapor retarder that adapts its permeability based on interior moisture levels. In humid conditions, it allows controlled vapor movement to help dry the assembly, while in drier conditions it tightens to limit unwanted diffusion. The result is superior moisture management, reduced condensation risk, and a more stable, comfortable indoor environment.
Dual performance as an air barrier: In addition to smart vapor control, this roll acts as an effective air barrier, helping to minimize drafty seams and air leaks around edges and penetrations. By reducing uncontrolled air movement, it supports steady interior temperatures and lowers energy waste.
Product specifics that matter for planning
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Roll dimensions: 10 ft wide by 100 ft long; coverage ≈ 1,033 sq ft
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Thickness: 2 mil
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Use: Attics and Walls
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Material: MemBrain; Formaldehyde-free
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Seams: Seams should be sealed with compatible tapes to maintain an airtight barrier
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Package quantity: 1 roll per package
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Energy certification: Not Energy Star certified
Why MemBrain matters for your project: Moisture and air movement are two critical drivers of energy loss and indoor humidity issues. MemBrain’s adaptive permeability helps keep humidity in check while maintaining an effective barrier against drafts. This translates to fewer temperature fluctuations, reduced risk of mold in moist climates, and improved comfort year-round.
Ideal use scenarios
- New construction where a continuous air barrier and vapor management are essential for building envelope performance
- Retrofits upgrading existing attics and wall assemblies to improve energy efficiency
- Projects in climates with seasonal humidity swings, where moisture drying potential is a priority
Who should consider this product
Homeowners undertaking energy-efficiency upgrades, builders managing new builds, and remodelers aiming for a more durable, moisture-controlled envelope will benefit from MemBrain’s unique combination of air barrier performance and smart vapor control.
Key takeaway: With a robust 1,033 sq ft coverage in a single 2 mil roll, the CertainTeed MemBrain air barrier and smart vapor retarder delivers targeted moisture management and reliable air sealing for attics and walls — all in a single, formaldehyde-free solution that supports healthier, more comfortable living spaces.
