Coverage requirements

When installing insulation, care should be taken not to exceed the square-foot coverage shown on the label. (ASTM C739 requires that each bag of cellulose loose-fill insulation be labeled with tech­nical information, including the maximum net coverage per bag of the particular insulation for all commonly specified R-values.) The labeled thickness is the minimum thickness required for a given R – value. The initial installed thickness in ceiling applications will exceed the settled thickness shown on the coverage chart. The bag count and weight-per-square-foot requirements of the coverage chart must be followed to provide the specified R-value at settled density.