Closed cell spray foam density is measured by weight. For example, a 12-in. square box filled with 2-lb. density foam (fully expanded) would weigh two pounds. And a 12-in. square box filled with 3-lb.

It is also fairly expensive. Depending on the region and market, spray-foam insulation can sell for $1.30 to $3.50 per square foot. In most home markets, this type of insulation is considered an ...

Business groups fear legislation moving through Springfield banning single-use plastics and styrofoam containers will drive ...