Other Green Solutions  
     
 
Wood Frame w/ fiberglass batt insulation
Pros:
  • Inexpensive
  • Some Johns-Manville fiberglass can have very low formaldehyde emissions
  • Cons:
  • Fiberglass batts are not an air barrier (air barrier is as important to you home's thremal performance as insulation is!)
  • The R-value of insulation materials is dependent on ambient temperature and wind conditions. Independent tests show that at 18 degrees F, with a 15 mph wind, the theoretical R-value of batt insulation drops from 19 to 7.
  • Correct installation for maximum theoretical thermal performance is impossible to achieve in real-world field conditions (i.e. actual installed thermal performance does not match lab conditions so R-19 walls can be even LOWER than R-7)
  • Convective air currents within the wall cavity diminish thermal performance
  • Little sound control benefit
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