R-values / Guides

R values and insulation performance
Efficient home design

Understanding thermal performance

...R-values are measured at a mean temperature of 24°C [75°F] and a temperature difference of 28°C [50°F], but this doesn’t necessarily match with the temperatures...

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

How insulation works

Insulation slows the rate of heat transfer, helping keep homes warmer in winter and cooler in summer. How well-insulated your home is will determine how comfor...

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

...R-values to simplify things for us. So don't tax yourself by trying to figure out both. The higher the R-value number, the better insulated the product is. Ke...

Roxul mineral wool batt insulation in LEED Homes
Insulation and soundproofing

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

Not all insulation materials are the same, and they are not always interchangeable A basic understanding of how walls work is needed to help you understand w...

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

The best tips for buying windows

...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-oriented windows] ...

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

...R-values to Passive House standard easily taking a standard code compliant R-24 wall up to a R-52 high performance envelope. Even Lloyd Alter of Treehugger ma...