How To Install Insulation In Attic Rafters

If your house doesn t already have a layer of insulation between the joists you ll need to install one before adding a layer over the joists.

How to install insulation in attic rafters.

For rolled insulation place it between roof rafters. Staple sheets of 6 mil plastic over unfaced insulation to create a vapor barrier. Level uneven spots with a rake. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.

Overlap the sheets by 8 to 10 inches. Find a pre screened local home insulation contractor. Use 3 8 inch heavy duty staples every six inches. Staple through the plastic and into rafters.

Once they are in place you can then place the batts or blankets or blow insulation right out to the very edge of the attic floor. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. 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. Start in a corner away from the attic hatch and fit the roll insulation between the joists facing against the drywall.

Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board. If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards. 2 snap a chalk line between the length measurements. Attach the insulation to the rafter scab board by the paper flange so as not to compress the fiberglass.