How To Install Insulation In Attic Rafters

For diy attic insulation you ve got two choices.

How to install insulation in attic rafters.

Loose fill or batt the common term for blanket insulation. For rolled insulation place it between roof rafters. Staple sheets of 6 mil plastic over unfaced insulation to create a vapor barrier. It s worth changing tactics to insulate between the rafters and wall joists instead of the floor.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. You can use rigid foam panels or do as tom silva does with nearly all houses these. Overlap the sheets by 8 to 10 inches. Place the plastic sheeting on top of the rolled insulation.

Attach insulation staple it to the rafters or scabbed on boards with a staple gun so that the paper backing is toward the interior of the room to act as a vapor barrier. You can leave any existing insulation in place as long as it isn t damaged. If it doesn t add a small piece of insulation over top. Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss.

Tape the seams with duct tape. Find a pre screened local home insulation contractor. Use 3 8 inch heavy duty staples every six inches. Then feed the rolled insulation under wires and pipe if either is present.

With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door. Install the second layer of insulation. Staple through the plastic and into rafters. More insulation installation tricks and tips.

Level uneven spots with a rake.