Envelope Challenge

The Envelope Challenge

Sponsored by Roxul Inc. and Building Products of Canada with technical support from Clearshpere and research support from Ryerson University Graduate Studies, Building Science, the Sustainable Housing Foundation is launching the Envelope Challenge in 2011.

As part of his graduate studies, Rick Roos will examine a number of high performance walls types recently or currently being built that meet or exceed the upcoming 2012 building code to produce a framework for assessing the strengths and weakness of various building envelope typologies according to criteria defined through industry consultation. Envelope designs submitted by the Sustainable Housing Foundation’s Envelope Challenge participants will undergo in-depth engineering analysis. A rating scale will be devised to appropriately convey the strengths and weaknesses of the envelope analysis criteria.

Computer modelling, manual calculation and on-site measurements will provide data for rating the envelope designs in terms of the agreed set of criteria. The following is an initial list that will be more fully developed in consultation with industry.

  • Thermal resistance
  • Moisture dynamics
  • Durability
  • Construction costs
  • Environmental impact
  • Air tightness
  • Ease of construction