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CertainTeed MemBrain 8 ft. W X 100 ft. L X 2 mil Air Barrier and Smart Vapor Retarder Roll 833 sq ft

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Blocks outside air while adjusting its vapor permeability with humidity, so moisture can escape instead of getting trapped in walls or attics.
Certainteed MPN 902008 In Stock & Ready to Ship
$179.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

CertainTeed's MemBrain air barrier is built to do two jobs most wraps can't: block outside air infiltration while acting as a smart vapor retarder that adjusts its permeability with humidity levels. That means it helps keep conditioned air where it belongs in winter, then allows trapped moisture to escape during humid months instead of getting locked inside wall or attic cavities. It's meant for use in attics and walls, giving builders and remodelers one product that handles both air sealing and vapor control in a single install.

This roll measures 8 feet wide by 100 feet long, covering up to 833 square feet, and it's manufactured formaldehyde free. Made in the USA by CertainTeed under the MemBrain sub-brand, it's suited for new construction or retrofit projects where controlling both airflow and moisture is part of the building plan.

  • Product Type: Air Barrier and Smart Vapor Retarder
  • Dimensions: 8' wide x 100' long (Roll)
  • Coverage Area: 833 sq ft
  • Thickness: 2 mil
  • Usage: Attics and Walls
  • Formaldehyde Free: Yes
  • Country of Origin: USA

The Details Specifications

Brand Certainteed
Model / MPN 902008
UPC 042919020083
Weight 12 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Certainteed. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

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The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Certainteed

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