Introduction - History - Manufacturing - Physics of R-Value - Embodied Energy - Energy Cycle - U of C study - PCM's - Conclusion

 

 

R-Value Exposed

The thermal resistance of insulation is depicted by

2

L = thickness
k = thermal conductivity.


THERMAL CONDUCTIVITY CALCULATED

  • Cellulose is .041
  • Fiberglass is .045
  • Polyurethane foam is .024


Calculating the R value of the insulation using

4

R-Value given in:equation

 

We find the R value of 1 inch of the following insulations:

Cellulose is 3.52
Fiberglass is 3.20
Polyurethane foam is 5.9