How To Install Insulation In Attic Rafters

Then feed the rolled insulation under wires and pipe if either is present.

How to install insulation in attic rafters.

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. Loose fill or batt the common term for blanket insulation. Find a pre screened local home insulation contractor. Staple through the plastic and into rafters.

For diy attic insulation you ve got two choices. The existing layer should sit at the top of the joists. Install the second layer of insulation. More insulation installation tricks and tips.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. You can leave any existing insulation in place as long as it isn t damaged. Use 3 8 inch heavy duty staples every six inches. 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.

For rolled insulation place it between roof rafters. Level uneven spots with a rake. If it doesn t add a small piece of insulation over top. Attach the insulation to the rafter scab board by the paper flange so as not to compress the fiberglass.

Staple sheets of 6 mil plastic over unfaced insulation to create a vapor barrier. Place the plastic sheeting on top of the rolled insulation. You can use rigid foam panels or do as tom silva does with nearly all houses these. Start by tucking small pieces of insulation between the rafters against the rafter vents.

Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss.