UFFI foam insulation was used extensively in North American homes during the 1970’s until it was banned due to fears over offgassing of formaldehyde. Those fears were largely unfounded and the ban was overturned in the U.S., although it still remains in effect in Canada. Learn the history of this insulation, why and where it was banned, and how to inspect for it in the home in our new article on UFFI insulation inspection.