Install Insulation In Attic Rafters

The existing layer should sit at the top of the joists.

Install insulation in attic rafters.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Apply insulation between rafters when finishing an attic into a heated room or when building a cathedral ceiling in the home. Loose fill or batt insulation is typically installed in an attic. Begin at a wall and work toward the center of the attic floor or the entryway carefully placing insulation between joists and ensuring a snug fit.

2 snap a chalk line between the length measurements. To install insulation batts and blankets. Both can be added to uninsulated attics or layered over existing material. Install the second layer of insulation.

How to install rafter insulation. See more on different types of insulation. Loose fill or batt the common term for blanket insulation. At the perimeter of the attic lay the insulation up to the roof rafters but keep it away from plywood roof sheathing.

To completely cover your attic floor with insulation out to the eaves you need to install rafter vents also called insulation baffles. For diy attic insulation you ve got two choices. Lay the batts across the ceiling joists covering the existing insulation. Garages built without attics are.

To find out if you have enough attic insulation measure the thickness of the insulation. The baffles will allow circulation to continue even though insulation has been installed directly in the. 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 your attic is going to be converted into livable space then you will need to insulate the roof rafters.

Loose fill insulation is usually less expensive to install than batt insulation and provides better coverage when installed properly. Complete coverage of the attic floor along with sealing air leaks will ensure you get the best performance from your insulation. If using insulation with a vapor retardant facing install the material with the vapor retardant side down. You can leave any existing insulation in place as long as it isn t damaged.

Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints. In part 6 of this series on attic insulation we dealt with proper attic ventilation and how it goes hand in hand with proper insulation. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. In part 7 you ll learn how to insulate the attic rafters.