The biggest issue we run into is not having enough black dirt (quality soil) on on hand. Trucking in more soil can add thousands of dollars, and it's not often evident at the start of construction or ... read more
Here is a good website to reference for foam insulation:
http://energy.gov/energysaver/types-insulation
Types of Liquid Foam Insulation
Today, most foam materials use foaming agents that don't use ... read more