How to Blow Insulation in a House


Insulation for your home comes in different types and depends on your preference. The most common is roll insulation, but blown insulation can also be used. Blown insulation, including cellulose made from recycled newspapers, is typically used in an attic, but it can also be applied inside your interior walls. You can blow insulation into a house by using an insulation blower.

  • Stud finder
  • Power drill
  • Hole saw attachment
  • Insulation blower
  • Rag
Use a stud finder to find the location of all of the studs along the wall of the room you want to insulate.

Drill a hole between each of the studs and into the drywall with a power drill using the hole saw attachment. The hole should be located 2 to 3 inches below the top of the wall or wall plate. Set the cut pieces of drywall aside.

Insert the end of the blower house into a hole and hold it in place by wrapping a rag around the end of the hose to keep insulation from coming out.

Have a second person turn on the insulation blower and begin blowing insulation into the cavity in the wall.

Turn off the insulation blower when you begin to feel resistance from the insulation in the wall cavity.

Repeat Steps 3, 4 an 5 for the rest of the wall cavities you want to fill with blown insulation.

Replace the cut drywall sections and patch with drywall mud. Repaint the walls, if needed, to complete the project.

Tips and Warnings

  • Foam sealer can also be used to patch the drywall.

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