This type of insulation typically fiberglass or cellulose insulation can be added over existing insulation provided it s installed perpendicular to joists.
How to add cellulose insulation to attic.
Do not tack down roll or batt insulation because compacting reduces its effectiveness or r value.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Move across the attic until you ve hit your desired height at every point.
Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling.
3 have a friend add material to the hopper.
Densely packed bales of cellulose are fed into the hopper of an insulation blower powered by an electric motor.
Lay the batts perpendicular to the joists so.
Roll or batt insulation.
Make sure the fill s depth is uniform across the attic.
Block all vents in the attic floor with baffles making sure to extend the baffles at least four inches above the planned thickness of your insulation.
Unlike fiberglass insulation installed in roll out batts on the attic floor.
Fasten blocking around the hatch or door to allow the material to be installed around this area without escaping.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6.
This can be added on top of old insulation.
To make it easy to eyeball how level the material is as you blow it in screw depth guides to joists throughout the space.
The cellulose is blown into the attic or walls through long flexible tubes that run from the blower to an application nozzle.
Then pivot in place and do the same thing to the other side.
How to install attic insulation over existing insulation wear a long sleeve shirt gloves eye protection and a dust mask.
Blow in insulation until the hopper is empty.