Using Insulfoam over ISO on this Salt Lake City, Utah commercial project helped the contractor, All Weather Waterproofing, secure the project and saved them roughly $90,000 on 5200 squares. Insulfoam EPS product used: 1# Insulfoam EPS and 1.25# Insulfoam SP in two layers to achieve an R21.
“Cost is the most important factor when a building owner chooses a roof system for a commercial building, according to a 2014 survey of building owners conducted by Buildings magazine for the EPDM Roofing Association. According to the study, 39 percent of building owners cited cost as their top roofing consideration. Product warranty and long-lasting components also were highly rated just behind cost, indicating building owners and roofing professionals want to balance performance and cost.” – Professional Roofing Magazine, An Insulation Option