Airtightness: Do we really need to know the ACH?

A look behind the science of airtightness measurements and why this simple test is critical if you want to build high-performance homes. Learn the history, lessons learned, what are the risks of not knowing the numbers and what you can avoid if you do.

Critical Canadian Home Building Science Part 7: The Great Canadian VAPOUR BARRIER controversy.

Do we still need "Vapour Barriers" made of polyethylene in high-performance walls with continuous insulation and good air barrier detailing? The industry and codes continue to struggle with this question.

A Better ACH Metric for Small or Attached Canadian Homes—NLR vs ACH