How can the quality of insulation material be primarily evaluated?

The quality of insulation material is primarily evaluated by its density because density is a critical factor that influences the insulation's effectiveness. Denser materials typically possess better thermal resistance properties, meaning they can slow down heat transfer more effectively. This is particularly important in determining how well an insulation material will perform in controlling temperature and energy efficiency in buildings.

Evaluating insulation by its density allows contractors to choose materials that meet specific performance criteria required for different climates and building types. While color, manufacturer, and installation method can all play roles in the overall effectiveness and longevity of insulation, they do not directly measure the material's ability to resist heat transfer, which is fundamentally tied to density.