Like Batt Insulation, the insulating performance of Blown Insulation is measured in R-Value, determined by the depth blown (measured in inches). The deeper the insulation is blown, the higher the R-Value.
Blown Insulation is primarily used in existing homes to insulate an attic floor. With Batt Insulation, gaps created when Batt Insulation is cut to fit around pipes and wires can reduce the effective R-Value by as much as 50%. Blown Insulation creates a seamless blanket of insulation, filling irregularly shaped areas and around obstructions, minimizing air leakage. That’s why blown insulation is more efficient for an attic floor application.
If not blown in properly, however, the thickness can vary across the floor, resulting in non-uniform R-Values across the attic.
Blown Insulation can also be installed over existing insulation for increased energy efficiency. The average attic has about 6” of insulation, equivalent to R-11. The Department of Energy recommends R-49 for proper attic insulation, which translates to 19” of insulation.
The US Department of Energy estimates that increasing attic insulation to R-49 with 19" of Fiberglass Insulation can reduce total energy bills by up to 10%.
Combining R-49 Blown Insulation in an attic with Radiant Barrier Coating will DOUBLE estimated savings, reducing total utility bills by up to 20%!
Click below to learn about:
• Installing Fiberglass Blown Insulation• Benefits of Fiberglass vs. Cellulose
