Air barrier / Discussions

How do you do a vapor barrier in a dense pack cellulose wall?

...air conditioning. Are you absolutely sure that no vapour barrier is okay? How do I convince the building inspectors? I can see how it doesn’t exactly look like ...

Posted by Ian MacKay July 26, 2018, 2:48 p.m. Wall assemblies - renovation 4 Responses

My window drips when I run my air conditioning. What is the fix?

...barriers can cause exactly such a problem in a house with AC, this article covers that - Why you should never put a poly vapor barrier in a house with air con...

Posted by Sean Sullivan Aug. 27, 2020, 10:36 a.m. Heat pumps, geothermal and AC 5 Responses

How do you insulate 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

Is it possible to connect greenhouse with the building?

...barrier (less heat in summer, more in winter) and some space to grow plants like tomatoes or herbs. I have read your articles about greenhouses and solariums, s...

Posted by Julia Jedrys March 31, 2020, 6:47 p.m. Greenhouses and Sunrooms / Solariums 1 Responses

How do I insulate my half below grade basement?

...barrier playing out – that would be a vapor barrier on both sides of the stud wall, no? Dry inside does not mean for sure the concrete is dry, in fact if it h...

Posted by tom mckeand Oct. 14, 2019, 11:01 p.m. Basements improvements 1 Responses

What windows should you use when trying to build a Passive House?

...barrier in roof system ( Hot roof). Both exterior and interior will be clad with log siding. I wanted to use wood windows to maintain as much as a rustic feel...

Posted by Raoul Lions Jan. 25, 2019, 2:18 p.m. Windows and doors 1 Responses

Basement reno - How do I effectively insulate my basement?

...air and vapour barrier and has a high per-inch R value. Besides spray foam, yes, you could put Rockwool in each cavity, then EPS in that same cavity (sealed to ...

Posted by Steve J Feb. 13, 2019, 10:25 p.m. Foundation and basement improvements 2 Responses

Does paint work instead of a poly vapour barrier?

...air barrier as well, which is very different, read more here – The difference between air barriers and vapor barriers and how to apply them As for a way to ...

Posted by Bill Fletcher May 6, 2020, 1:46 p.m. 1 Responses

Can I spray foam insulate from the outside?

...air space so the exterior of the wall can dry. Here is our how to install siding properly video , and another on how to install a weather barrier . And read her...

Posted by Kurt Klischuk June 6, 2019, 8:56 a.m. Wall assemblies - renovation 1 Responses

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

...barriers as a radon barrier, which is better than nothing, but I’d want a thicker one for my home. There is a barrier called Radon Block, which is first of al...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

How do you remove water droplets from under a crawl space vapor barrier?

...barrier? Water is acculating on the dirt side of the vapor barrier. If I crawlspace has water droplets forming under the poly vapor barrier (on the dirt side)...

Posted by Paul Racioppo Feb. 7, 2020, 3:49 p.m. Crawl spaces 3 Responses

Can you put hemp insulation in an attic?

...barrier if so, just wondering if you have an air barrier. If you don’t have a proper air barrier and you are removing all the insulation, then that is really ...

Posted by Pamella Weatherly-Phillips Aug. 16, 2019, 11:49 a.m. Roof assemblies - renovation 1 Responses

What is the best way to insulate a home from the outside?

...air barrier. If you do add new plywood sheathing, you could just tape the joints and it will act as your air barrier Read all about how to insulate exterior w...

Posted by Sylvie Gagnon Dec. 12, 2017, 11:58 a.m. Wall assemblies - renovation 1 Responses

Can you spray foam a house from the outside?

...air barrier and vapor barrier all in one; going with celllulose will mean attention needs to be spent to keep it dry, make sure the wall is airtight, and that y...

Posted by Joan Lawrence July 11, 2019, 7:17 p.m. Wall assemblies - renovation 3 Responses

Is the ZIP sheathing system good or bad for water control?

...barrier and air barrier. It’s a great concept, but you are not alone in your skepticism. Before you give it a yay or nay, here are a couple of pages that will h...

Posted by Trevor Prinz Nov. 26, 2019, 4:03 p.m. Walls and Roofs 5 Responses

Do you have a diagram showing effect of winds on the pressure inside the house?

...air through any holes in your building envelope. That will create positive air pressure inside the house, and force air out other holes in your building envelop...

Posted by Bryan Bargen June 8, 2018, 5:20 p.m. Air and vapour barriers 1 Responses

Should you allow air flow through a crawl space with a dirt floor?

...barrier and prevent air leaks. You could then cover the spray foam with your existing plywood if its still in good shape, or to keep animals out entirely you co...

Posted by Amber Murray Aug. 17, 2020, 10 p.m. Crawl spaces 3 Responses

How do you re-do the insulation on a old cabin from the outside?

...barrier, vapor barrier and air barriers) work in a wall - Building science made easy video– How to design walls that work properly Since you are going about...

Posted by Raphael Couture Sept. 14, 2020, 8 a.m. Wall assemblies - renovation 3 Responses