DIY Frequently Asked Questions / Loose-Fill Insulation')">
Comes compacted in bags and is poured or blown into walls and between joists of the attic floor.
Good for retrofitting insulation into previously uninsulated homes.
Each bag is labeled according to federal specifications for both mineral wool and cellulose. Left column lists the R-value, second column tells how many bags are needed to cover 1,000 square feet of attic floor area, the third column gives the minimum thickness after completing the job.
Some manufacturers have two columns on thickness for loose-fill and cellulose insulation. The second of these is labeled “settled density”. This is important since cellulose settles quickly.
Types include fiberglass rock wool and cellulose. Cellulose is made from waste paper that has been treated to be fire retardant. It is also less likely to cause skin irritation.
DIY Frequently Asked Questions / Loose-Fill Insulation')">
Comes compacted in bags and is poured or blown into walls and between joists of the attic floor.