Vapor barrier / Discussions

...barrier, those are most likely to create a problem in an air-conditioned home in a very hot and humid climate, so if you plan to have AC and keep your house very cool then upgrading to a ‘smart’ membrane is good idea. They are more breathable than standard 6 mil poly vapour barriers. From a design and quality of work p...

...barriers - Choosing a weather barrier house wrap, which is best? This page explains air / vapor barriers -  The difference between air barriers and vapor barriers    this one caulking and sealants which is best? But a 'double vapor barrier' isn't really something you need to concern yourself with, so don't go out of y...

...vapor barrier without tearing out the whole wall? I've read enough of the basement articles to know that on a new wall I should put a vapor barrier right against the foundation, then the wall assembly. Ideally with a perimeter drain as well. But this isn't new and that's not gonna happen for a while. Thanks! Putting va...

...vapor barrier also be the air barrier? There is a difference between the two, read more here first –  The difference between air barriers and vapor barriers If you plan to have an additional air barrier, for example a house wrap or Tyvek at the bottom (which would be my preference, then the options open up for how to ...

...vapor barrier on the house side (not pointed downward toward the basement). I want to had additional insulation, especially over the unheated garage. Is wool insulation over the existing fiberglass recommended, or should I simply add unfaced fiberglass insulation? Thanks, DB

...vapor barrier behind our drywall but doubt it - this is an older wood framed bungalow. In addition, i dont expect our interior drywall forms a very great air barrier either - we have the usual holes from outlets etc but we have a lot of windows and other installations - all done seemingly DIY so I have no idea if they ...

...vapor barriers was originally to prevent moisture accumulation and damage in walls, which it does above grade, but below grade a vapor barrier CAUSES moisture accumulation and rot. It’s a bit late now I guess, but what you should probably do if you can is see about cutting holes in the vapor barrier to let the moisture...

...vapor barrier that satisfies building inspectors (as it looks the same as any poly vapour barrier) but it will also let moisture escape. It’s called certainteed Membrain, and when too much humidity builds up, it actually has pores that open and let some moisture escape. But keep in mind, interior vapour barriers are on...

...barrier.  Then stud out the inside and R13 insulation then dry wall. Thoughts? What is your climate zone? Experiencing tornadoes is a clue, but closer is better. A foil bubble wrap will for sure act as a vapor barrier, but that should only be installed in a cold climate, so I’m assuming you’re a bit to the north. Foil ...

...vapor barrier using 6 Mil plastic and hold the new walls a few inches off of the block. I am worried about the moisture that makes it past the Drylok and it stoped by the vapor barrier. I have no french drain or any drain sytem. I believe Im right when saying that that space between the block and barrier has to breath ...

...barrier on the ground, but the rest is a little suspect to me as it is to you. First though I would point you to this page in case you haven’t seen it yet, it discusses the issues with crawl spaces and how they are best insulated and kept dry. Crawl Space Insulation Tips for Insulating Crawlspaces Properly So a few que...

...vapor retarder primer (vapor barrier paint) in our Edelweiss LEED Platinum Demo House instead of a 6 mil poly vapor barrier, it was for the walls not the floor. As for thickness, that is what we would call a bit of a concern with using it as a vapor barrier, it is harder to be sure there is consistency of coverage. Our...

I have a cinderblock foundation in my house built in central east Ontario in 1983. In 1999 I finished the basement, with tar paper against the cement wall, then studs and four inches of batt insulation and then a vapour barrier and drywall. Two years ago I noticed cracking on the exterior of some of the foundation bloc...

...vapor barrier on ground/walls, taping best able around mechanicals and piers - and adherred to the skim of mortar under the rim. Questions: 1) do you think an interior french drain to the sump is necessary? 2)  spray foam insulation on walls necessary? 3) would you pursue a radon system drawing under the vapor barrier...

...vapor barrier) and difficult to escape on the other side (OSB) is likely part of the problem. The other thing at play here is the interior vapor barrier and air conditioning the space. Here is another important page to read –  Never Install Air-Conditioning in a Home with a Vapor Barrier You will read there about how a...

...barrier over the cellulose on the inside under the drywall,  will I then cause vapor to be trapped between the outside vinyl /foam board and poly barrier.  The foil faced foam board is  not completly tight against the underlying shingles and I assume does allow for some air movement underneath it and  the vinyl siding....

...barrier afterwards/ that would actually be a bit better. There was usually a poly vapour barrier installed after the insulation and stud wall seemingly to ensure it would go moldy as quickly as possible. Either way, if you are getting mold and you have a stud wall with batt insulation against concrete then I don’t see ...

...vapor barrier' potentially trapping moisture in the roof deck causing long term issues given Naples is hot and humid. I was of impression open cell foam is an air barrier but not a vapor barrier, would the moisture only travel one way? I have read one option is to a/c the attic space, another is to install the 'peel an...