spray foam can actually outperform it. Plus, with so many ways you can use expanding foam, this material certainly is handy.

Spray foam is used in attics ... per inch of the three forms of insulation discussed at 3.6 per inch. “We use an expanding foam in closed-cell application that has an R-value of 6.5 per inch ...

Foam guns contain more parts than cannons, such as a spray nozzle with trigger and control knob near it that can adjust bead size (1/8 to 3 inches). Furthermore, two-finger triggers make operation ...