You must meet the National Energy Code for Buildings (NECB) 2020 standards. The days of using simple fiberglass “batt” insulation are mostly over for retail, as they often fail to meet today’s strict energy tiers and can lead to condensation dripping on merchandise.
The industry standard for modern retail is Insulated Metal Panels (IMPs). These are “sandwich” panels with a foam core that provide high thermal resistance (R-value) in a single step, ensuring your store meets code and stays comfortable during Canadian winters.