How To Insulate Garage Ceiling Rafters

In the case of a cold roof structure the insulation is placed between or between and under the rafters or at ceiling joist level and the roof is ventilated by leaving a 50mm gap above the insulation which vents air to the outside.

How to insulate garage ceiling rafters.

The insulation should be installed with the paper facing out and attached using staples. The rolls have a number of 8 foot pieces rolled onto one roll. This will allow you to add the needed insulation. If the garage is open to the rafters the boards that support the roof use r 38 insulation between the rafters at the roof if they are 10 inches deep.

The fiberglass insulation comes in rolls that are 16 to 24 inches wide. To prepare determine the area of the space you plan to insulate and add 10 to 20 percent to account for mistakes and odd spaces you need to fill. The paper will fold over the rafter framing thereby allowing for attachment with staples. Measure the space between joists and studs to determine the width of the insulation you need.

To get more insulation in the garage install a ceiling and provide access to the space between the ceiling and the roof. Be sure to count the spaces above doors and windows. Safety precautions and mistakes to avoid during garage roof insulation. Push the insulation in place between the rafters but be careful not to compress the material.