Air barrier / Discussions

Is There a Difference Between an Air Barrier and vapor barrier?

...airs. This page explains it clearly - The difference between air barriers and vapor barriers What is almost certainly happening is that warm, humid air is e...

Posted by Sherri Mccormick Aug. 17, 2018, 3:24 p.m. Roof assemblies - renovation 3 Responses

How do you attach exterior siding without affecting the air barrier on a passive house?

...airtight barrier. Thanks, Scott The Zip Sheathing System is an air barrier sheathing when the joints are taped as specified by the manufacturer. There should ...

Posted by Scott Bowker July 16, 2018, 11:07 p.m. Wall assemblies - new construction 3 Responses

How do I create a complete air barrier using a vapour retarding primer?

...air and vapour movement comes from the fact that usually one product (6-mil polyethylene) is used as both the vapour barrier AND air barrier, but air leakage an...

Posted by Mihai Wilson May 3, 2018, 10:15 p.m. Wall assemblies - renovation 1 Responses

Can I put a breathable peel and stick weather (air) barrier on the inside walls and ceiling?

...barriers - Choosing a weather barrier house wrap, which is best? This page explains air / vapor barriers - The difference between air barriers and vapor barri...

Posted by Anomika Singhn Oct. 1, 2018, 9:56 p.m. Air and vapour barriers 1 Responses

Does using T & G wood plank instead of drywall affect where we put the vapor & air barrier?

...air barrier . I won't go to far off on a tangent but please see this page about WRBs (weather resisistent barriers) as air barriers , because you could go with ...

Posted by Sue Colbourne Nov. 9, 2019, 6:16 p.m. Walls and ceilings - interior surfaces 3 Responses

Can you use a vapour retarder paint on the ceiling instead of using a poly vapour barrier?

...air barrier , we had our poly barrier go through the wall assembly and taped it to the exterior air barrier membrane. That would be a solution for new builds,...

Posted by Anwas Qwelten June 8, 2019, 3:56 p.m. Air and vapour barriers 2 Responses

is a double vapor barrier on a South Florida roof bad?

...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 b...

Posted by Arthur Moore April 6, 2020, 12:57 p.m. Roof assemblies - renovation 0 Responses

What is the best to insulate metal structures for all seasons?

...air barrier, preventing air flow, but allowing moisture to dry. I understand that any number of air barrier is acceptable, but would inner, outer, or both be pr...

Posted by Morgan Aldridge Jan. 19, 2019, 1:53 a.m. Wall assemblies - new construction 1 Responses

Why is there Mould on particle board outside vapor barrier on new addition?

...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...

Posted by Christine ML June 7, 2020, 1:35 p.m. Wall assemblies - renovation 1 Responses

Do I need a standard 6 mil poly vapor barrier with dense cellulose exterior wall?

...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 fo...

Posted by jeff Chormann May 1, 2020, 9:18 a.m. Air and vapour barriers 2 Responses

What is the best way to deal with a drop ceiling in a high humidity room?

...air barrier and possibly paint it to also be a vapor barrier. Then use unfaced mineral wool or fiberglass batts. But the tongue and groove boards would be naile...

Posted by steve Roberts Dec. 24, 2019, 8:01 p.m. Walls and ceilings - interior surfaces 1 Responses

How can I solve a moisture problem in attic from 1941 home?

...air barrier vs vapor barrier concepts. My house is above a dirt crawl space. And we have a very high water table at 18 inches!!! It is definately a part of my s...

Posted by Rachel Katz June 8, 2019, 4:06 p.m. Air and vapour barriers 0 Responses

What is the best way to do Stucco/E.I.F.S exterior window wraps?

...air barrier installation? Installing a window properly to avoid air and water leaks is left up to the installer, there is no certification that we know of. Ther...

Posted by Pat Estes July 17, 2020, 11:50 a.m. Windows and doors 1 Responses

How do you seal windows from the exterior for water and air but not create a vapor seal?

...air can escape on one side of the wall then it won’t enter on the other side, so one air barrier is enough. We covered the exterior gap with wood, and caulked a...

Posted by Piyush Prince Nov. 7, 2018, 12:10 a.m. Windows and doors 1 Responses

How do you build a cathedral ceiling?

...air and vapour barrier first, then the rest of the cavity will be filled with dense pack cellulose insulation, with an intello vapour barrier holding cellulose ...

Posted by Raoul Lions Oct. 19, 2019, 8:07 a.m. Roof assemblies - new construction 1 Responses

How do you insulate a 3 season cottage?

...air seal. I am concerned about the dew point and looking for advice on vapor barrier material and location.

Posted by MARK E BROWN LLC Nov. 7, 2019, 4:57 p.m. Wall assemblies - renovation 0 Responses

How should I insulate basement Walls in climate zone 5?

...barrier to the concrete or between the studs and drywall and the mineral wool has no vapor barrier. Is this space between concrete and studwall a terribly idea ...

Posted by Chad Johnson March 25, 2019, 8:33 p.m. Basements improvements 1 Responses

Is it possible to reconcile installing a wood stove in a airtight, super-insulated house?

...air barrier continuity can be maintained but when the stove is not in use it would represent a significant heat loss. We preach a lot about airtightness , air b...

Posted by rick seward Dec. 23, 2018, 2:49 p.m. Wood stove and biomass heat 1 Responses