How to Install Blown-In Cellulose Insulation

Written by ehow home & garden editor
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Blown-in cellulose insulation is an environmentally friendly way to insulate your house. The main ingredient in cellulose insulation is recycled newspaper. Chemical additives make it fire retardant. With the right tools, blown-in cellulose insulation is safe and easy to install especially in attics with irregular spaces. Any insulation installation produces dust; but cellulose insulation doesn't make you itch like fiberglass insulation does. Read on to learn more.

Skill level:
Moderately Challenging

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Things you need

  • Plywood for attic walkway
  • Measuring tape
  • Blown-in insulation
  • Dust mask
  • Goggles
  • Insulation blower (rental)
  • 20-inch-wide cardboard strips
  • Soffit vent chutes
  • Staples
  • Staple gun
  • Metal flashing
  • Metal screws

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  1. 1

    Place strips of plywood for a walkway down the length of your attic. If you want to reserve part of the attic for storage, place plywood strips there as well so you don't accidentally step through the ceiling.

  2. 2

    Measure the length and width of your attic space. Determine how thick you want your blown-in insulation. Use the formula on the cellulose insulation package to determine how much to buy.

  3. 3

    Purchase the insulation. If you don't have dust masks and goggles, purchase them also as well as any other supplies you might need for the project. Pick up the insulation blower at the rental place. Be sure you understand how to use the blower.

  4. 4

    Prepare a cardboard wall around the access door to the attic. This helps prevent the cellulose from drifting into the house.

  5. 5

    Staple soffit vent chutes on the inside walls of the soffit vent to keep the insulation from blowing out of the attic. Surround the heat ducts and anything else that generates heat with metal flashing to keep the cellulose from getting too hot.

  6. 6

    Use the insulation blower to distribute the insulation. Start at the farthest corners of the attic and work toward the attic access. Be careful not to step off the plywood planks at any time. Remember to measure the depth of the insulation as you go to make sure you are installing it evenly.

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