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Fiberglass insulation has been the top selling insulation material for either commercial or residential buildings. Its high R rating and simple installation are the biggest reasons fiberglass tops the list among the other available insulation types.
The term R rating is defined as the capability of an insulation product to stop heat transfer; the product will [...]

The usefulness of insulation and its protection properties is based on what is known as its R-Value. Insulation is manufactured to prevent the flow of heat. The more heat the insulation stops, the higher the R-Value of that insulation.
When comparing spray on insulation to fiberglass insulation, you will find that the spray foam has [...]