There are several options to insulating your attic space. Depending on the type of home you have.Below are some of the options:

  • Spray foam
  • Loose-fill Fiberglass
 

Spray Foam (Roof Deck)

From a performance standpoint, the best type of insulation is spray foam. There are two types; closed-cell and open-cell, aka 2-lb and ½-lb, respectively. They have insulation values of approximately R-6.5 and R-3.6 per inch, respectively. When installed properly, both types of insulation will fill all of the nooks and crannies and make for a perfect air barrier. When air can’t move through it, you have zero heat transfer through convection.

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Jet Stream® Ultra Blowing Wool Insulation

Knauf Insulation Jet Stream® ULTRA Blowing Wool Insulation is an unbonded, virgin fibrous glass blowing insulation designed with optimal thermal properties and excellent coverage and blowing characteristics.

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This seems to be the most commonly used in new-construction homes and has an R-value of approximately 2.5 per inch. Installers use a large machine to blow it in. You can’t simply buy it in bags and spread it around yourself.