R value / Guides

R values and insulation performance
Efficient home design

Understanding thermal performance

...r temperatures the performance decreases dramatically. Importantly, it is at these more extreme temperatures [i.e. farther away from interior temperatures] wher...

Thermal image showing where home heat loss is occurring.
Insulation and soundproofing

How insulation works

...rtable. RADIATION (in this non-nuclear case) refers to heat transferred through electromagnetic waves, particularly in the infrared spectrum. Heat emanates fr...

Net Zero Energy home
Off-grid and Net-Zero Housing

Net Zero Energy house in Edmonton, Alberta

...r cold weather climates. Efficiencies range from 100%-400% depending on outdoor temperature. More details can be found in the Belgravia Green Brochure or em...

How to choose Triple pane, high performance windows
Windows and doors

The best tips for buying windows

...rfaces and R-values for that same wall insulation level of R50. Having more window area, on the other hand, guarantees more solar gain [except for North-oriente...

Wood frame Triple-glazed, argon-filled windows in the Ecohome Demo House
Windows and doors

Choosing windows - which window frame? wood v aluminum v vinyl

...rior for a more traditional look. Fibreglass frames are the preferred material of the LEED for Homes rating system due to performance and a more moderate en...

Energy modeling simulation of heat loss through thermal bridging
Efficient home design

What is a thermal bridge and why is it so important to break it?

...r side results in a wall that performs closer to R13 or even lower, depending on the amount of studs. The true or 'effective' R value of a wall is further impac...

An attic with 'insulating paint' which doesn't insulate
Insulation and soundproofing

Does 'insulating paint' work?

...roper insulation or the money to undertake a proper retrofit can also fall victim to this scam, and after dropping $100 or more per can, they are only further a...


Case Study: Kenogami House, Saguenay, Quebec

...r tank. From there it can serve domestic hot water needs, or be transferred to the radiant concrete floor as thermal storage to balance temperatures between day...

Roxul mineral wool batt insulation in LEED Homes
Insulation and soundproofing

Choosing the right insulation: the pros, cons and applications for walls, slabs & basements

...r barrier and air barrier. Blowing agents are 1430 times worse than carbon dioxide, exponentially worse than EPS. For ecological reasons rather than performan...

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

Rigid insulation panels: which ones to use for different applications

...rial as a type II vapour retarder, suitable for residential construction. Also, rather regrettably for traditionally produced XPS, the hydro fluorocarbons (HF...

heat pumps in tandem with heat pump hot water tanks
Hot water

Increased efficiency with heat pumps working in tandem

...requirement to about the Passive House standard of 15 kWh per square meter. Windows are a part of that but they are also part of our energy performance strategy...