How to Install Dense Pack Cellulose Insulation

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Cellulose insulation is a type of blow-in insulation that is made from newspaper clippings. It is blown into the crevices between the studs of the wall and the joists along the floor of attics. Cellulose insulation is environmentally friendly. Dense pack cellulose insulation has much higher insulation values and reduces leaking in walls significantly. Installing dense pack cellulose insulation is similar to installing regular cellulose insulation. Only a few tools are needed to complete the job.

Things You'll Need

  • Tape measure
  • Plastic
  • Masking tape
  • Insulation blower
  • Dust mask
  • Gloves
  • Safety goggles
  • Measure the area where the cellulose insulation will be installed. Run a tape measure across the length and width of any wall in the room. Multiply the two measurements together and record the total square footage of the first side. Repeat the process for all of the other sides.

  • Add all of the sides together for the total square footage of the walls in the room. This will determine how many bags of insulation will be needed. The number of bags will vary based on how thick you want the insulation to be installed.

  • Cover all vents and other areas you do not want to insulate with plastic. Tape the plastic over the areas with masking tape.

  • Put the first bag of cellulose insulation into an insulation blower and point the hose of the blower toward any corner of the room. Turn on the blower and begin spraying the insulation into the cavity between the wall studs. Move down the first stud and fill the wall up to the desired thickness.

  • Move on to the second wall cavity and repeat the process. Continue around the room in the same manner until all of the cavities are filled to the desired thickness. Add more bags of insulation to the blower when necessary.

Tips & Warnings

  • Refer to the bags of insulation for R-values and how many bags you will need for your specific project. One bag of cellulose insulation covers 40-square feet at an R-value of 13.
  • How much insulation you need will vary depending on where you live.
  • Always wear a dust mask, gloves, and safety goggles when working with cellulose insulation.
  • Long sleeves are also recommended to prevent itching.

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