What is the performance difference between cellulose and fiberglass?
Several factors contribute to the performance of the thermal envelope of a building, thus it is a mistake to only consider the R-value when specifying insulation. The factors: • Total R-value of all system components • Air infiltration due to leakage through gaps in the system • Air infiltration due to permeability of system materials • Convective flow within insulated systems • Thermal bridging across the building envelope • Thermal mass of building components Since cellulose insulation has a higher density than loose fill fiberglass and fiberglass batts, the air infiltration into and within the cellulose insulation is less than in its fiberglass counterpart. The fact that cellulose insulation is sprayed into wall cavities instead of cut and placed by hand, means tighter seamless barriers are created in every area of the wall cavity, including small cracks and crevices. When a such a barrier is created with cellulose insulation your building is 38% tighter and uses 26% less energy tha
