Additionally professional insulation installers must display a similar chart in the attic verifying the required depth of the insulation has been met.
Cellulose insulation settling in attic.
Blown in cellulose is an environmentally friendly material made from recycled newspaper so it s easier on your skin and lungs.
Fortunately a high quality professional installation can prevent most of the problems caused by settling.
It prevents settling in wall cavities.
The mounds of loose material fill.
Cellulose insulation can settle by as much as 20 percent depending on how it is installed.
Cellulose insulation installs as fluffy aerated material that settles over the following weeks and months.
While settling is one of blown in cellulose insulation s advantages this can also be a problem mostly with walls.
In walls standard practice is to install cellulose insulation at 3 0 to 3 5 pcf.
Unlike fiberglass insulation installed in roll out batts on the attic floor cellulose is blown into the attic under air pressure through large diameter hoses.
This could leave gaps in a wall as the insulation compacts vertically or it could leave space between a floor and the insulation beneath it.
There are also a few drawbacks to cellulose insulation.
Blown in cellulose has a higher r rating and is less expensive than either blown insulation like fiberglass attic insulation or fiberglass batts.
Cellulose blown in ceiling insulation is a good choice for diyers.