Model # 902018

Internet #205920791

Store SKU #1001320880

CertainTeed MemBrain 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
0042919020182

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:

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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 22.
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 Vapor barrier Great product used it with Roxul Insulation in my basement.
Date published: 2016-11-30
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 4 out of 5 by from It's hard to know if such a product is really doing it's job until, potentially, years after the ... It's hard to know if such a product is really doing it's job until, potentially, years after the fact. That said, the material went on easily enough and I think it'll provide some extra protection in our finished basement. I was worried when I first started applying it because it's a bit more stiff and "crunchy" than I had expected (unlike typical poly), but it went on OK and I didn't experience any tearing. My box was somewhat over 50ft long to the point that I returned a 2nd box which was unneeded, when I thought I'd have to use 15-20ft of it. So, yes, it seems expensive but it was easy to work with and I hope it will do its job! One thing that's always in the back of my mind with any moisture / vapor barrier is that people are going to put holes in it whenever something like a picture gets mounted to the wall. If you're serious about this layer of protection, then I guess it's worth it to make a strong point to only wall-mount if you can do so into a stud. I'd be interested to see some scientific studies done on walls with this stuff, and whether a few small holes has any measurable impact or not.
Date published: 2017-03-28
Rated 5 out of 5 by from It was what I expected, took too long to arrive,... It was what I expected, took too long to arrive, so I went and bought some
Date published: 2017-02-28
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 Great product, easy to install and very sturdy Great product, easy to install and very sturdy
Date published: 2017-04-11
Rated 5 out of 5 by from Quality product. Easy to apply.... Quality product. Easy to apply.
Date published: 2017-01-24
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