Rated 4.6 out of 5 by 13
Rated 5.0 out of 5.0 by thedogscar 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.
June 25, 2016
Rated 5.0 out of 5.0 by skaizun Fairly easy to install; obscure directions
The wrap unrolls fairly easily, and cuts with a single-edge razor blade through all four layers very easily. Although the instructions indicate that it can be used only for interior use, I had a need for it on the protected side of the edge of the garage where the sewer pipe comes out: Between the landscaper's work around the area and recent storm activity, the vinyl siding along that edge had blown off and was damaged beyond functional and aesthetic use. I also needed to replace the foam insulation panel between the garage wall and the siding, so, given that rain rarely hits that edge (there's an overhang), I decided it was worth the little extra effort to protect the middle surface. After installing the foam panel (in hindsight, I could have installed the wrap between the garage wall and foam panel!), I overlapped two pieces of the wrap, that I cut to size, over it. The instructions state that staples should be spread 12-24" apart, presumably to reduce the number of holes that penetrate it, and, thus, keep it functioning to prevent mold. However, the small area made that impossible, so, I stapled every 6" to keep it upright. The 2 mm thickness kept the sheet relatively in place, though it tended to flop over itself as I was stapling and trying to keep a smooth, wrinkle-free, layering. It took all of 5 minutes to do this small area, and I am very satisfied that it will protect much better against the elements than if I had left it alone. Before getting this product, I was going to use winter window insulating wrap, which is only a little thicker than food-style plastic wrap, and is made of petroleum product, rather than nylon, as this wrap is. As for value, it may seem expensive, but, it covers a lot of area, which, if it is exposed to a high humidity, will probably pay for itself in preventing mold, mildew, dirt, etc. As such, I believe it is worth the expense, and fairly easy for a do-it-yourselfer, though, if you are going to do entire walls, you should have at least one other person to help hold up one end, as I will, when I have to replace the shower, which is a few months off (plenty of wrap left!). I would also point out that the single-page instructions are very obscure, and I had to guess at what they were talking about (for one thing, it doesn't say whether the logo side should be facing out, up, or whatever; perhaps it doesn't make a difference, as it would with similar wraps, but, I erred on the logo-side-out-and-right-side-up side!).
April 14, 2016
Rated 5.0 out of 5.0 by MeCzech Looks to be a great product.
Our kitchen/bathroom remodeling project has progressed, ceiling and rebuilt 2 exterior walls are insulated and now we used over insulation this vapor barrier (pic.1) . Installing drywall will be next step. Just before we started using this product I found from product info that this vapor barrier is laid over unfaced insulation. Too late for us, because we have used faced insulation (surplus from previous improvements stage). We laid this vapor barrier over it anyhow and I hope, it will work well. Other use I found for placing this membrane as a vapor barrier for framing of shower stall to protect wooden studs under the cement board (pic 2) (waterproofed with red waterproofing from inside of shower stall). We were two people handling this membrane so that installing went very easy. It's a light material which gets stapled to studs and with little care while working with it, it does not tear easily. Inside the boxed wrap are very detailed instructions (pic.3) (English & Spanish) with pictures, advising how to work with membrane, how to cut it over larger openings and electrical boxes (pic. 4 & 5). I hope product will work well for us at least during seasonal very humid weather.
February 23, 2016
Rated 5.0 out of 5.0 by pablo55 Good product
the material is firm enough to easily handle a 14 foot reach. this was the easiest part of finishing the ceiling.
April 26, 2016
Rated 3.0 out of 5.0 by mixmox Not for exterior side of walls!
I obtained this product to use on a project to replace some exterior rotten wooden cladding.
The wood had rotted out and my plan was to pull off the rotten wood and replace it with new cladding.
The box states that this product prevents moisture vapor from entering the wall cavity in winter and allows vapor to escape the cavity in the summer. It goes on to say how the home can be protected from harmful moisture in the walls by installing in basements, bathrooms, laundry rooms and exterior walls. OK sounds good, and I imagined that it is a similar product to the wraps one sees installed to provide a vapor barrier.
Inside the box on the instruction sheet, we learn however that this product has to be installed on the inside side of the wall cavity, i.e. on the drywall side rather than on the cladding side. In that case, how could it possibly prevent outside moisture from entering the cavity??? Outside moisture gets to the cavity before encountering the product!
The instructions inside the box state that it is not suitable for use as an exterior vapor retarder. That piece of information is nowhere to be found on the outside of the box.
I decided to go ahead with the installation anyway as this is what I had. There was already a layer of Tyvek underneath the rotten cladding anyway so I decided to simply install the MemBrain over that and in the correct orientation.
This review should thus be read with 2 facts in mind:
a) it is supposed to be installed under the drywall and not the cladding
b) I have no way to tell how effectively it works, which would take some years of controlled testing.
The instructions give good clear information on how to roll it out and hang the product on the studs and sill (inside the building). The plastic sheeting is transparent and has the product name printed on it so that one can tell which side should face outwards. It is folded so that the top edge can be stapled along the top of the wall and then unfolded down into the room. In reality of course it will unfold as one goes to staple it along the top of the wall.
In my case, the wall consisted of pink insulation between studs, sheathing, Tyvek and shiplap boards. I removed the wooden shiplap and then installed the Membrane plus ½” foam insulation and the T1-11 siding.
The MemBrain was easy to cut and staple in place.
The outside of the box (and also the website) includes two diagrams of how the product prevents moisture coming in during the summer during high humidity, and keeps it in, in the winter. The diagram makes absolutely no sense at all though because water vapor (represented by blue arrows) is shown in both cases to be coming into the house! I think the arrows in the ‘summer’ diagram should be reversed 180° to indicate that moisture can get out, but not in. See pictures provided. Rather disconcerting.
October 9, 2015
Rated 5.0 out of 5.0 by bl Very easy to use
very easy to use and install ......................
April 5, 2016
Rated 5.0 out of 5.0 by Dundee Good Quality Vapor Barrier
I used this to cover the gravel in my crawl space. It features that the membrane when all taped will prevent moisture from coming through and it senses and adapts permeance to varying humidity throughout the different seasons of the year. It prevents moisture buildup by allowing it to escape the cavity in the summer. It installs like polyethylene with an extra level of moisture protection for comfort in the home. It is about 8' wide and 50' long so you can divide it into two shorter sections if needed. Coverage is about 420 sf.
March 25, 2016
Rated 5.0 out of 5.0 by MikeLikesIt Air Barrier with Smart Vapor Retarder
I need to install a vapor retarder in the bathroom. After reading up on this product, this look like is what I'm looking for. This product is use for interior walls and not for exterior walls. The product comes with instruction inside how to install it. It's pretty easy to install. If you should have to use more than one piece of MemBrain per wall, make sure the pieces overlap by at least 3". If there is any tears more than 4" use Scotch 610 2" wide to repair them. Time will tell if the product works.
January 7, 2016