How To Install Insulation In Attic Rafters

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.

How to install insulation in attic rafters. Replace the floorboards and then spray more insulation on top of it. 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. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. 2 snap a chalk line between the length measurements.

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. Level uneven spots with a rake. Find a pre screened local home insulation contractor. Tape the seams with duct tape.

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. Use 3 8 inch heavy duty staples every six inches. 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. Start in a corner away from the attic hatch and fit the roll insulation between the joists facing against the drywall.

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. Overlap the sheets by 8 to 10 inches. Staple through the plastic and into rafters. Staple sheets of 6 mil plastic over unfaced insulation to create a vapor barrier.