Product cost isn't the only factor in the value equation. Jobsite efficiency, quicker turnaround during installation and product flexibility are critical in today's ever evolving industry dynamics. Fiber glass installation requires no machinery or downtime and keeps the jobsite more efficient for maximum productivity and a better bottom line.

T. Dean Moody elaborates. "For builders that want to keep tight schedules, fiber glass is the way to go. Spray foam is very labor intensive, fiber glass is more efficient."

John Ratzow adds, "Spray foam is as much art as it is science - temperatures have to be correct, humidity and dew point have to be taken into account - it's easy to mess it up. And you need an extremely talented person to install it correctly. It takes at least two times longer to install spray foam compared to fiber glass, for the builder it could be even longer because of the re-entry time requirement. There is a lot of training and maintenance required for spray foam equipment, before, during and after installation."

Ratzow explains that Wisconsin Insulation Services does very few full-cavity spray foam jobs and when they do it's only for very high end projects. He added that they only use closed cell foam because he has concerns with open cell foam and the effect of climate and vapor on the sheathing.