You can get to the same place with either material.
Cellulose insulation in attic ceiling.
Assuming your current attic insulation is made from fiberglass and has a value of r 13 you d have to add roughly 10 inches of additional fiberglass to hit r 38.
It is applied with a very small amount of water to activate an adhesive of some kind.
To hit code minimums you ve got to add new insulation on top of the old insulation.
Or 7 inches of cellulose.
This can prove advantageous at reducing the overall weight of the product on the ceiling drywall helping prevent possible sag.
Stabilized cellulose is used most often in attic roof insulation.
Steve easley energy expert and rick chitwood discuss the methods and equipment used to blow cellulose insulation into attics.
Blown in cellulose is an environmentally friendly material made from recycled newspaper so it s easier on your skin and lungs.
This reduces settling and decreases the amount of cellulose needed.
Many green builders aim for a ceiling rated at r 60 r 70 or even r 100.
Blown in cellulose has a higher r rating and is less expensive than either blown insulation like fiberglass attic insulation or fiberglass batts.
This video shows a diy cellulose insulation install in a cathedral ceiling in a new house construction that has limited accessibility crawl space was 18 5.