Fiberglass Insulation

• Fiberglass insulation used in a wood frame wall
  
  Possibly the most widely used and traditional type of insulation, because of its generally low cost, fiberglass insulation is made from a mixture of sand and recycled glass and is naturally fire-resistant. Fiberglass is most commonly used in a roll or batt form, but is occasionally "blown in." When installed properly, fiberglass has been known to outlive other types of insulation.
  
  

Cellulose

• Blown-in cellulose insulation in an attic
  
  Cellulous is often described as the most environmentally friendly type of insulation, as it is made from 80 percent post-consumer recycled newsprint. This type of insulation is blown in with a hose and is becoming more and more popular with home builders. The energy efficiency of cellulose is very close and slightly outperforms fiberglass insulation; however, the life expectancy of cellulose is not as long.
  
  

Spray Foam

• Spray foam insulation installation
  
  Much like cellulose, spray foam insulation is installed with a type of blower that uses compressed gas. This can be a better alternative to cellulose as it expands to about 100 times its original volume, filling any air gaps in the stud wall and creating a more efficient temperature barrier. One of the only notable drawbacks to this type of insulation is that it is more difficult to remove for any reason and cannot be reused, unlike fiberglass.