How to Densely Pack a Wall With Cellulose That Has Fiberglass Insulation

Just because your home was insulated with fiberglass insulation when it was built doesn't mean it has adequate insulation today. Insulation deteriorates and settles over the years, meaning most of the protection could be sitting in the bottom half of the wall, with the top half essentially hollow. Blown-in insulation fills in whatever gaps have developed.

Electronic stud finder
Pencil
Insulation blower
Jigsaw
Cellulose insulation
2 cans of spray foam insulation
Drywall knife
Thick wallpaper border, 12 inches wide

Instructions

- 1
  Find each stud in the wall. Make a pencil mark halfway between each pair of studs, six or eight inches below the ceiling.
- 2
  Set the end of the blower hose against the wall over one pencil mark. Trace around the hose, making the circle a little wider than the hole. Repeat this tracing for each mark. Cut out the traced circles with a jigsaw.
- 3
  Load the insulation blower with cellulose insulation. Push the hose all the way into the first hole, so the end of the hose gets to the bottom of the interior cavity of the wall.
- 4
  Start the blower. Fill the cavity inside with cellulose insulation while slowly pulling the hose out. Completely fill the space. Repeat the filling for each hole.
- 5
  Spray foam insulation into the mouth of each hole, letting it expand outward. Smooth it out with a drywall knife. Repeat this for each hole. Let the foam insulation dry for at least one hour.
- 6
  Hang a wallpaper border along the top of the wall to cover the patched holes.

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