Calculating the R-Value of Garage Door Insulation

The R-Value is a number that indicates the quality of your garage door insulation. This measurement is particularly important if your garage is connected to your house, because if the garage door isn’t well-insulated, cold air could trickle into your living area. The goal is to obtain a garage door with the higher possible R-Value, meaning that it’s resistant to heat loss; a measurement of 6.5 or higher is preferable. Keep reading to learn about how to calculate the R-Value of your own garage door, or of a door you may purchase.

Finding out the R-Value of Your Garage Door

The actual tests that are conducted to determine R-Value are extremely complex, involving mathematical formulas and necessitating carefully controlled testing conditions, so you cannot reasonably expect to conduct these tests yourself. The best way to find out the R-Value of your model of garage door is to contact the manufacturer, or check out online databases which list the R-Values of several common models (this is available on Wikipedia, for instance). There are also several R-Value calculators available online, whereby you plug in information about the door’s materials and insulation information, and the calculator generates a number.