It's one of the most common questions homeowners ask: does spray foam need a thermal barrier? In British Columbia, the answer is usually yes. Spray polyurethane foam is a plastic, and even with fire retardants it can burn and release thick smoke. That's why BC code requires a spray foam thermal barrier in most occupied areas, including basements, garages, and finished rooms. Attics and crawlspaces can be more nuanced depending on the product and how the space is used. Western Insulation breaks down the rules in plain language so you can plan your project with confidence. Learn more: https://westerninsulation.ca/spray-foam-thermal-barrier-bc/