What is UFFI?

UFFI stands for Urea-Formaldehyde Foam Insulation. It is indeed an insulation material that was commonly used in the past but has been banned in Canada due to health concerns associated with formaldehyde emissions. These emissions can lead to indoor air quality issues and negatively impact residents' health. The decision to ban UFFI was made as a precautionary measure to protect public health, highlighting the importance of considering the potential health effects of building materials.

The other options represent different categories of building materials or codes that do not relate to UFFI specifically, making them less relevant to the question. UFFI is notable in discussions about building safety and health standards due to its past usage and subsequent regulatory actions.