There is NOTHING better to help make the sale than showing the comparison on performance of their own new home
It's easy to make performance promises but the customer will only believe what they see. Show the difference between Spray Foam
(@ R13 walls R20 Attic) and the prescriptive amount of fiberglass.
Show them the monthly energy savings and compare that to the increase to their mortgage (when upgrading to SPF). This shows positive cash flow from the very first month
Use the comparison report to show the efficiency of the foamed home verses fiberglass
Point out the amount of energy savings. Fist the percentage, then the yearly and then the monthly
Change the conversation from "cost" to "investment"
Show how the monthly savings vs the increase to their mortgage payment.
putting them in a Positive cash flow from month #1