Internet #205920791

Model # 902018

Store SKU #1001320880

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
$ 58 55
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Product Overview

  • Guards against moisture
  • For use as vapor retarder
  • 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
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
  • The right insulation can save on energy and heating and cooling bills. Check out our Buying Guide for helpful tips.

Product Overview

  • Guards against moisture
  • For use as vapor retarder
  • 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
Model #: 902018
Sku #: 1001320880
Internet #: 205920791

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
  • The right insulation can save on energy and heating and cooling bills. Check out our Buying Guide for helpful tips.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Key Features

Product Overview
Key Features
  • Guards against moisture
  • For use as vapor retarder
  • 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
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
  • The right insulation can save on energy and heating and cooling bills. Check out our Buying Guide for helpful tips.

Product Overview

  • Guards against moisture
  • For use as vapor retarder
  • 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder
Model #: 902018
Sku #: 1001320880
Internet #: 205920791

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
  • The right insulation can save on energy and heating and cooling bills. Check out our Buying Guide for helpful tips.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar

Compare Similar Products
Brand CertainTeed MemBrain CertainTeed CertainTeed CertainTeed
Name 100 in. x 50 ft. Air Barrier with Smart Vapor Retarder MemBrain 8 ft. x 100 ft. Air Barrier with Smart Vapor Retarder MemBrain 10 ft. x 100 ft. Air Barrier with Smart Vapor Retarder MemBrain 12 ft. x 100 ft. Air Barrier with Smart Vapor Retarder
Price
$58.55
$190.43
$211.35
$233.54
Ratings (48) (5) (0) (2)
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Specifications

Dimensions

Product Length (ft.)
50
Product Thickness (in.)
0.002
Product Width (in.)
100

Details

Insulation Accessory Type
Vapor Barrier Insulation
Insulation Features
Vapor Retardant
Insulation Type
Accessory
Number of Pieces
1
Product Weight (lb.)
5lb
Returnable
90-Day

Warranty / Certifications

Warranty Information
None

Specifications

Dimensions

Product Length (ft.)
50
Product Thickness (in.)
0.002
Product Width (in.)
100

Details

Insulation Accessory Type
Vapor Barrier Insulation
Insulation Features
Vapor Retardant
Insulation Type
Accessory
Number of Pieces
1
Product Weight (lb.)
5lb
Returnable
90-Day

Warranty / Certifications

Warranty Information
None

Questions & Answers

What tape should be used on the seams where 2 pieces of membrain meet?

What tape should be used on the seams where 2 pieces of membrain meet?
Asked by: gp
Use SIGA or Pro Clima tapes. you need to tape ALL seams. Tape is too weak and not vapor open and will not last. This product can be used in high performance or Passive House construction but it must be taped well with the proper product.
Answered by: Surferosa
Date published: 2019-01-26

I am installing unfaced insulation between the ceiling joists in my basement to help insulate and...

I am installing unfaced insulation between the ceiling joists in my basement to help insulate and sound proof between the basement and first floor. Would this product be appropriate to install in this situation?
Asked by: BB
I would think this would work since it’s breathable. I did the same thing a few years ago in my basement with unfaced insulation before this product existed and I used Breathable House Wrap like tyvec.
Answered by: WeakEndWarrior
Date published: 2018-03-12

how does it attach to metal studs?

how does it attach to metal studs?
Asked by: Chris
Normally the vapor retarder is stapled to wood studs but if you are using metal studs then I would spray the edge of the metal stub with 3M adhesive 77, let it tack up then stick the air barrier to it. The adhesive is in the paint department in a spray can at Home Depot stores.
Answered by: JohnTheBuilder
Date published: 2019-01-28

Is this product plastic membrane or a foil ?

Is this product plastic membrane or a foil ?
Asked by: CuriousGeorge
This is a plastic material. It feels a bit like the "crinkly" type of cellophane, such as used in windowed envelopes.
Answered by: JeremyR
Date published: 2018-04-26
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Customer Reviews

100 in. x 50 ft. Air Barrier with Smart Vapor Retarder is rated 4.6 out of 5 by 48.
Rated 1 out of 5 by from I purchased 3 rolls of this. The membrain itself seems fine, my problem is with the quantity per ... I purchased 3 rolls of this. The membrain itself seems fine, my problem is with the quantity per roll. This isn't cheap poly. At almost $65 per roll, I expect to get what I paid for. I measured all 3 rolls. One was 49 ft 6 inches, which I suppose is 'close enough'. The second roll was 49 ft 8 inches, but one end was cut so concave that the usable length was only 49 ft. The last roll however, was totally beyond explanation. It was only 40 foot long. That is a full 20 percent short of its stated length. Like I started out with, this stuff isn't cheap, so I don't think it is too much to ask to receive what is listed, and all 3 were short, one unacceptably short. I have tried to contact CertainTeed about it, but they won' respond. All 3 boxes were factory sealed, so I know the problem happened at the factory. The picture shows how the piece on the wall that should have reached the corner came up almost 10 feet short.
Date published: 2019-01-18
Rated 4 out of 5 by from Easy to install. Easy to install.
Date published: 2019-06-04
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 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
Rated 4 out of 5 by from Time will tell if it keeps out the moisture I'm using this product a little differently as a temporary fix. My sunroom has an old and drafty door that I cannot replace until I remodel the entire room. Last year, to keep out the cold, I put up a sheet of rigid foam over it during the winter. In the spring when I removed the foam, I found a little bit of mold growing on the foam and door frame. Now that I have this vapor retarder, I placed that around the door and then put the foam over it. I don't know the exact thickness of the product. If I had to compare it to something I'd say maybe similar or a tiny bit thicker than a Ziploc bag. I can't comment quite yet on whether it's doing what it's supposed to do since I won't be taking the foam down until spring. I plan on using this product for the walls of the sunroom when I remodel it because there's currently no moisture barrier in there.
Date published: 2015-10-16
Rated 4 out of 5 by from Great Vapor Barrier! We were so happy to find a vapor barrier of such a large size! The 100 ft by 50 ft was perfect for the space we were looking to refinish. So glad that we didn't need to purchase multiple projects for this step. The vapor barrier was packaged well (although the package was much smaller than I expected), but it certainly was true to the dimensions described. Very happy with this selection!
Date published: 2015-06-22
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 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
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