If you’re planning to add loose-fill insulation in your attic, making a basic plywood rake attached to a rake handle will make spreading much easier.
To make this type of rake, cut a scrap piece of plywood to the length of the space between the joists plus 4″. The extra 4″ allows for an overhang on the joists.
Next decide how deep you plan to install the loose-fill material. For example, suppose you are planning to lay the loose-fill material to a depth of 3″ between the attic joists. Measure the depth in the space you plan to fill then saw the plywood rake as illustrated in Fig. 5. The rake should ride on the joist on either side and level the material off evenly to a depth of 3″. Attach a handle, making a handy tool that will save you hours of backbreaking labor and enable you to rake the material easily and evenly into otherwise unreachable corners (Fig. 5).