We continue our series on updates to the National Building Code with Troy Ferreira, technical director for the Canadian Roofing Contractors Association. Ferreira has been involved with commenting and proposing revisions for the 2020 NBC, which has just come into effect nationally but is still being revised. We touch on new language affecting fire protection for spray foam, open cell spray foam requirements, asphalt core boards, snow loads, air tightness, energy efficiency and other topics.