What’s a Garage Door R-Value

Insulation R-value measures how well insulated garage doors can resist heat flow. The higher the R-value, the better the door’s ability to keep indoor temperatures comfortable, reduce energy costs, and improve energy efficiency. The door’s R-value is expressed in units of thermal resistance per unit of thickness, such as m²K/W, and varies depending on the insulation material's type, thickness, and density. Therefore, when choosing a new insulated garage door for your home, pay attention to the R-value to ensure maximum efficiency.

https://garagedoorchamp.com/what-is-insulation-r-value/