Is an R-value the most accurate measure for performance?

Not always.  It is the current method used for building codes use to rate insulation, but certainly is not the only thing a someone should consider when deciding on how to insulate their project.

• There are three types of heat flow:
  • Conductive – the way heat moves through materials
  • Convective – the way heat moves through the air
  • Radiant – when heat travels in a straight line heating anything solid it it’s path

  Only Conductive heat flow is used in determining R-Value levels, however, studies have shown that Convective Heat accounts for 25-40% of the energy used for heating and cooling a typical home. Spray Foam stops the Convective heat from infiltrating your home, something that other insulations just can’t do.