Next prepare the attic including sealing air leaks such as the area near the attic stairs. The first step to insulate an attic is to select the insulation and calculate the amount needed by following recommendations for the climate where you live.
In this case the area behind the knee wall will be uncomfortably hot or cold.
How to insulate an attic. There are two basic ways to insulate a finished attic. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Plan to pull up the flooring and layer new insulation on top of the old.
Additionally purchase some loose fill insulation to insulate corners and angles where the batting won t fit. Then carefully follow the installation instructions and complete the process. Because the simplest and cheapest way to insulate an attic is to add material to the floor.
You ll want to buy enough batting to lay at least 10 to 14 inches over the entire space. To insulate an attic get some batting made out of mineral wool fiberglass or recycled foam. If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space.