Basement vapour barrier / Guides

Radon and vapour barrier below slab on grade floor
Radon in Homes - Mitigation

Vapour / radon barriers below slab floors

...vapour barrier, we used a 10 mil barrier and a radon evacuation stack to lower radon gas levels in homes, research shows (see below) that thicker membranes offer more effective protection. In this video we are installing a 10 mil vapour barrier but we would probably use a thick vapor barrier like this one in future a...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...basement to have any chance at doing what you want it to do without growing black stinky and unhealthy mold, it should be finished with respect to the conclusions of building scientists regarding moisture movement namely; " Vapor barriers on basement insulation will rot your walls " We put vapour barriers in baseme...

Better Basement Design on basement walls prevents mold and midlew
Healthy indoor air quality

Basement renovations: How to prevent mold when finishing basements

...basement wall assembly, with a stud wall directly against the foundation followed by fiberglass insulation and a vapour barrier. Notice the difference between the studs against the foundation and the studs that formed an interior division wall; the vapour barrier did not protect the exterior wall from damage and mold g...

Insulating crawlspaces as part of home renovation
Crawl spaces

How to insulate crawlspaces properly as part of renovating an older home

...vapour barrier at 1 inch, and testing shows that EPS foam acts as a vapour barrier (1 perm) at 2 inches or thicker. Rock wool insulation batts on basement walls © Ecohome Rock wool (mineral wool) boards are an alternative product you can use and they are made from recycled stone dust, so it does not burn and do...

How to insulate basements properly
Insulation and soundproofing

Best practices for basement insulation in new home construction

...vapour barrier primer © Benjamin Moore Interior gypsum board: Latex paint ( or vapour retarder primer ) is recomended as an interior vapour control layer below grade. It is most important to not include a polyethylene vapour barrier or other vapour impermeable materials that prevent walls from drying. 6 mil...

Slab on grade or a foundation and basement?
Foundation choices

Slab-on-grade vs foundation and crawlspace or basement

...basement, no basement walls, just one slab of concrete on which you build your house. They aren’t suitable for all building sites, which we will get into later, but for now let’s assume you can build on one. There is a lot of prep work to do first, you need well-packed soil, proper drainage, insulation, vapour barrie...

Installing foam panel insulation, which is best?
Insulation and soundproofing

Rigid insulation panels: which ones to use for different applications

...vapour barrier. Here is the fun part - Since there is foil on either side of the panel, you end up with a harmless second vapour barrier, which is usually heresy in building design. But this can help in summer months when there is a risk of the vapour drive reversing due to air conditioning during hot humid weather. ...

Slab-on-grade for Ecohome's upcoming video building guide
Slab on Grade

how to build a slab-on-grade on standard soil

...barrier / vapour barrier For added durability over the commonly used 6-mil polyethylene vapour barrier, we used a 10-mil barrier instead. The added thickness gives us more protection against accidental holes made during the construction phase, giving us greater confidence in it for radon gas protection. 10-mil Su...

Passive home designer Harold Orr, one of the original high performance homes
Passive solar home design

The principal designer of the house that inspired the global Passivhaus movement reflects on the project that started it all.

...basement, a crawl space with R20 in the floor system, and a very tight air / vapour barrier. How homes lose energy in cold climates In my prescription I said "No basement" and a "very tight air / vapour barrier". If we could reduce air leakage by 80% and heat loss to ground (basement) by about...

Slab-on-grade construction technical guide
Slab on Grade

Slab-on-grade technical guide

...basement with much cheaper and better performing walls, though if you do need to build a basement to optimize sqft on your building plot, then learn best practice for insulating when building a new basement here , or if you have a basement and need to learn how to finish a basement & insulate correctly to avoid mold, s...

Off grid, passively heated and cooled house in the Gatineau Hills, Que
Off-grid and Net-Zero Housing

Off grid living blog, part 2: passively heated, this house in Quebec aims for LEED certification

...vapour barrier; 2x8 stud wall at 24" centres with mineral wool batts R 28; 1"1/4 exterior mineral wool board R5; plywood sheathing; house wrap; strapping; cement board siding. The ceiling is a mix of Roxul mineral wool batts and cellulose totalling R80, the basement is a mix of EPS foam and Roxul batts ...