Model # 902018

Internet #205920791

Store SKU #1001320880

CertainTeed MemBrain 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder

CertainTeed MemBrain

100 in. x 50 ft. Air Barrier with Smart Vapor Retarder

  • Guards against moisture
  • For use as vapor retarder
  • 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
$59.72 /each

Frequently Bought Together

Product Overview

For extra protection against moisture, the MemBrain Continuous Air Barrier and Smart Vapor Retarder is your weapon of choice. It lets wall cavities dry out, to help prevent mold. In summer, when humidity is high, it increases permeability so that moisture can escape, as air tightness is maintained. In winter, when humidity is low, it continues to block moisture. Use MemBrain with un-faced insulation in place of kraft faced insulation or polyethylene. Not all climate zones require vapor retarders.

  • Unlike traditional vapor retarders, MemBrain helps prevent mold by sensing and adapting permeance to varying humidity throughout the year to keep the wall cavity dry
  • For use with un-faced insulation as a vapor retarder in climate zones where one is required
  • Prevents moisture vapor from entering the wall cavity in the winter
  • Allows any moisture buildup to escape the wall cavity in the summer
  • Installs like poly with an extra level of moisture protection
  • Continuous air barrier and smart vapor retarder
  • Unique, patented product
  • Roll is 100 in. tall and 50 ft. long
  • How much do you need? Let our calculator help:

    Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can I use this over faced insulation and leave in in place when hanging drywall? Would be a year or so at least.

Asked by: Sharp712
It is not recommend to be used with faced insulation.
Answered by: daninkaty
Date published: 2017-02-14

What type of drywall could be put over this in a basement? Since the drywall cant breathe won't the moisture be trapped?

I am looking into using Roxul comfort board IS behind the framed wall and Roxul comfort batt between the studs on the outer walls or my basement. Both allow moisture to pass through so I need an air barrier that does the same but I am concerned that moisture will just build up behind the drywall.
Asked by: Adam
This material is to be put on the outside of stud wall to stop moisture from getting to the studs and insulation and drywall. As long as there is space between the stud wall and basement wall for it to breath then that should let the moisture not build up. If you have a lot of moisture then I'd consider a interior French drain.
Answered by: daninkaty
Date published: 2017-02-14

Is insulation required for the product to function?

Asked by: CW
No ,but using insulation will help control the climate better. Be sure to use the barrier on the outside of the stud wall.
Answered by: daninkaty
Date published: 2017-02-14

will this item work for a barrier under house in a crawl space that has high moisture under it.

Asked by: lars
Yes that is one of the uses for this material.
Answered by: daninkaty
Date published: 2017-02-14
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Customer Reviews

100 in. x 50 ft. Air Barrier with Smart Vapor Retarder is rated 4.7 out of 5 by 19.
Rated 5 out of 5 by from Heavy duty! We are finishing the mud room on the house and have now used this product over the insulation and behind the drywall. We have already discovered that the heat loss has been reduced with the use of this product. Long range we are hoping for a big return on investment in the form of lower heat bills. Easy to install and easy to use, we are happy with the product.
Date published: 2016-11-18
Rated 5 out of 5 by from The better building plastic Easy to use and it breathes. There is less likelihood of mold problems
Date published: 2016-09-28
Rated 5 out of 5 by from Very easy to work with. Purchased this for our Sprinter Van conversion. Very easy to work with. Purchased this for our Sprinter Van conversion.
Date published: 2017-01-03
Rated 5 out of 5 by from Vapor barrier Great product used it with Roxul Insulation in my basement.
Date published: 2016-11-30
Rated 5 out of 5 by from Quality product. Easy to apply.... Quality product. Easy to apply.
Date published: 2017-01-24
Rated 5 out of 5 by from Smart Investment This is a much better solution to vapor barrier protection than regular poly sheeting. Now realistically it's hard to know how effective this material is in allowing moisture to escape the walls in the summer, and yet prevent moisture from entering the walls in the winter, when it's the biggest problem. But if what they claim is even half true, this is a worthwhile investment. I've opened old walls to find terrible insulation degradation and rot even though a perfectly good moisture barrier was in place. And this technology, I assume, is similar to any "Tyvek" type product for sheathing the outside of a building to prevent moisture problems, so I'm betting it works well, as Tyvek is well proven.
Date published: 2015-08-04
Rated 5 out of 5 by from Works? I bought a very old house. While installing new wiring, discovered mice had shredded all the rolled fiberglass insulation. It was in balls at the bottom of the wall cavities. Decided to replace it with stone wool insulation (better sound proofing and less likely to be mice nesting). It has no vapor barrier. Besides in bathrooms, with high humidity, I think vapor barriers do more harm than good (at least for one season out of the year) ... but they are required by code in my zone. Thought I would give this a try. It was not much more than standard vapor barrier and just as easy to install. Time will tell how 'smart' it really is.
Date published: 2016-06-25
Rated 5 out of 5 by from Easy to install The size fit the room walls great. There is a little over lap at the top and bottom of the wall. We put it over a none backed insulation as per the instructions. The wife and I had no problem installing it ourselves. Started at the top and went down. We used a tar based caulk to adhere it to the studs, then stapled after that. If this does keep mold from growing I'm all for it.
Date published: 2015-06-16
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