wall-system / Green Building & Sustainable Home Renovation Information & Advice

What is the best wall system for a home?  We're frequently asked which is the perfect wall system for high-performance LEED, Passive House or Zero Energy Homes, Well, a perfect Answer to that Is, first Ask the Right Questions! - After all, what is the best way to get from one place to another?  You have to choose betwe...

What is the difference between a slab on grade and a crawl space? A slab on grade, or ‘frost protected shallow foundation’ is exactly that, a slab of concrete on the ground. There’s more to it of course, but let’s start with a ‘win’ in the comprehension department shall we?  A slab on grade rests directly on the groun...

What is the BREEAM rating system and should I get my home certified? The BREEAM rating system (Building Research Establishment Environmental Assessment Method) is the world's longest-established method for assessing, rating, and certifying the sustainability of buildings. Launched in 1990 in the UK, it has become a glo...

What is LEED for Homes about? LEED (Leadership in Energy and Environmental Design) is an internationally recognized rating system for commercial buildings and homes administered by the CaGBC (Canada Green Building Council)  to encourage sustainable building practices. While the commercial program has been in effect for...

What is the two thirds rule? How insulation and wall assemblies work best In the world of durable, high-performance green building, few concepts are as little understood as the two-thirds rule. It's pretty much common knowledge that in cold climates the vapor barrier goes on the inside of insulation, and in hot humid c...

LEED Platinum V4 wall design: building Science  The wall we designed for the Edelweiss house, Canada's first LEED Platinum V4 Home is best categorized as a 'REMOTE' wall, a high performance building envelope developed by the Cold Climate Housing Research Centre in Alaska. REMOTE stands for 'Residential Exterior Membr...

Dense-packed cellulose insulation - the history In 2005, Metric Homes of Carp, Ontario designed and built Canada's first Energy Star labelled home in Canada. This home was built with dense-packed (or dense-blown) cellulose as the wall insulation of choice. Their intent was to produce a better built home with the goal o...

LEED® for Homes: A Guide to the v4.1 version of this Green Building Certification For homeowners in Canada and the United States, the LEED® (Leadership in Energy and Environmental Design) for Homes rating system is the premier benchmark for designing and constructing healthy, sustainable, and highly efficient homes. De...

Larson truss wall systems for new green home building & renovations for max wall insulation A Larsen Truss is a type of lightweight & non structural double-stud wall assembly that allows for thicker insulation, is ideal for dense-packed cellulose insulation wall systems and a very high R-value building envelope...

The difference between air barriers and vapor barriers The job of a vapor barrier is to prevent vapor diffusion, and the job of an air barrier is to stop air leakage through differences in air pressure. A wall system should have one vapor barrier, but can have many air barriers. A vapor barrier can act as a very effect...

When it comes to hot water tanks, size isn't everything!  Determining the ideal capacity for a hot water tank is a critical step in saving money and home decarbonization. For decades, the 'bigger is better' philosophy led to the standard installation of massive 60-gallon (227-liter) tanks in 3-bedroom homes, regardless...