R-Value is a measure of thermal resistance used in the building and construction industry. It indicates how well a material can insulate against heat flow; the higher the R-Value, the better the material's insulating properties. This is crucial for maintaining comfortable indoor temperatures and improving energy efficiency in homes and buildings. Different materials, such as insulation, windows, and walls, have varying R-Values. For example, fiberglass insulation typically has a higher R-Value than cellulose insulation. Understanding R-Values helps homeowners and builders make informed decisions about materials to use for effective temperature control and energy savings.