Wall assembly / Guides

Passive House wall system ; Larsen Trusses & dense-packed cellulose insulation
Wall assemblies - new construction

Larsen truss wall systems with double-stud construction & extra insulation for new homes & energy efficient home renovation

...walls and roof. Larsen trusses are not structural or load bearing, ; their intention is simply to facilitate a thicker wall assembly for added insulation, and to place the vapor barrier at the 2/3rds point in the wall assembly creating all the advantages of a double-stud wall assembly without many of the problems, li...

Choosing a building envelope
Wall assemblies - new construction

Choosing a building envelope - starting with the perfect wall

...wall assembly may serve more than one function, air barriers in particular. Many materials within a wall assembly can slow air flow without trapping vapour. Option 1) Dense-packed cellulose wall: Dense-packed cellulose wall © Gergana Gatina, Ecohome This is a wall of offset 2x4s (interior then exterior) with ...

How to Insulate Exterior Walls from the Outside US Canada Ecohome
Walls and Roofs

The easiest way to insulate walls from the exterior in older homes

...wall is built to make sure you are not creating a condensation point at a dangerous place within the wall assembly, or preventing internal moisture from the occasional leak in the exterior skin from running away, so the wall structure can dry out. Walls need to be built to meet their specific climate needs. All too o...

Artistic rendition of one of the pre-fab net zero energy homes, Alberta
Off-grid and Net-Zero Housing

Net Zero Energy Community in Calgary, Alberta

...Wall panels and roof components were pre-made in the company’s manufacturing facility in Edmonton, then shipped to Calgary for assembly. This allows for a more precise build in a controlled environment, less manufacturing waste, and shorter construction time onsite. After taking delivery, completed sections are assembl...

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

...wall are plenty. It eliminates thermal bridging through studs, provides lots of room for insulation, and the air/vapour barrier is sandwiched between walls where it won't need to be punctured for electrical work, as all wiring is done on the interior 2x4 wall. High efficiency Double wall assembly © Bala...

Tyvek home wrap left exposed to wind and UV rays
Air and vapour barriers

Choosing the right house wrap / weather barrier, which is best?

...wall assemblies, and many products with different characteristics that can be used in different cases. For the sake of simplicity and not getting off on a bunch of tangents, in this article we will stick with the bread and butter wall assembly we all know - a stud wall with exterior sheathing, housewrap, strapping and ...

Building science for LEED v4 wall design made easy
Concept and design

Building science for LEED v4 wall design made easy - video

...wall, a high performance building envelope developed by the Cold Climate Housing Research Centre in Alaska. REMOTE stands for 'Residential Exterior Membrane Outside-insulation TEchnique' . Edelweiss house LEED Platinum V4 wall assembly detail © Cosella Dorken Remote walls are framed the way you would be used to...

Basement Design for walls prevents mold & midlew when renovating & finishing
Healthy indoor air quality

Basement renovations: How to prevent mold when finishing basements

...wall assembly for a basement application - read on! Rigid insulation board against concrete adds R value, breaks the thermal bridge and raises the temperature of the stud wall, which helps prevent moist air from condensing. The stud wall allows for the installation of wiring, additional insulation and drywall. Dryw...

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

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

...wall assembly for a basement application - read on! Rigid insulation board against concrete adds R value, breaks the thermal bridge and raises the temperature of the stud wall, which helps prevent moist air from condensing. The stud wall allows for the installation of wiring, additional insulation and drywall. Dryw...

Poly vapour barriers in air conditioned houses can cause mold and rot
Healthy indoor air quality

Why you should Never Install Air-Con in a Home with a Vapor Barrier

...wall assemblies in all but the coldest of climates, or at least change their location within the wall assembly to avoid the possibility of interstitial condensation damaging wall structures . Moisture-impenetrable vapor barriers work great in winter and, before air conditioning and heavily insulated walls, they were ...

R values and insulation performance
Efficient home design

Understanding thermal performance

...wall assemblies and insulation products has long been characterized using R-value, a metric which describes thermal resistance. While R-value is useful, it doesn’t tell the whole story about heat flow through building enclosures such as walls and roofs. Recently, a study by RDH Building Engineering Ltd . h as shown t...