PU foam has a mixed environmental profile. Positively, its superior insulation reduces operational energy consumption significantly. Modern formulations use pentane or water as blowing agents with low ozone depletion and global warming potential. Some products incorporate recycled content. However, the production of isocyanates is energy-intensive, and end-of-life recycling options are limited compared to some materials. Life-cycle assessments generally show net positive environmental benefits due to decades of energy savings offsetting production impacts.

