To install unfaced insulation, gently place the insulation into the cavity space between framing members. It is important that insulation be correctly sized for the cavity and fit snugly at the sides and ends. No fastening is required if the insulation material is held in place on all four sides and fills the wall cavity. The insulation in knee walls (see Figure 2, item 3) should be held in place to prevent the insulation from falling out of the wall cavity over time.

Note:Wherever batts or rolls of any type are too short to fill a stud cavity,a piece should be cut to size to fill the gap. When insulation is too long,it should be cut to fit properly,not doubled over or forced to fit.