When bidding large commercial projects, we typically come across contractors who would like the see our Spray Foam numbers compared to traditional batt or rigid board insulation. When we ask for the Spray Foam spec, they simply say, “Give me an R-Value of ‘this or that'”. What many people fail to realize is that R-Values are created in a vacuum. In other words, your 32 R-Value Batt insulation was given the 32 R-Value without accounting for air, moisture and other mechanisms of heat transfer.
In order to better understand the benefits of Spray Foam insulation over your traditional fiberglass model, you really should understand Convective Looping and Thermal Drift. When considering ‘real’ R-Values, 93% of conductive heat flow is already stopped by R-13 insulation. This is insulation actually performing at R-13. Upgrading from R-13 to R-40 reduces conductive heat flow by only another 5%. R-Value measures the energy (Heat) moving through the insulation material (Conduction). But the real culprit in energy or heat wasting in air-leakage (Convection).
Learn more about Real R-Value and how only Spray Foam Insulation offers it at www.skyline-industries.com.
Links to more information:
The R-Value Myth
Understanding the 6 Factors of Heat Transfer and Energy Loss
Commercial Roof Restoration