Insulated Garage Door U Value

An insulated garage door has a U-factor that measures how well it resists heat flow. A lower U-factor indicates better insulation. The U-factor is expressed in British thermal units (BTUs) per hour per square foot per degree Fahrenheit (°F). For example, a garage door with a U-factor of 0.30 means that 30 BTUs of heat will pass through one square foot of the door per hour for each degree Fahrenheit difference between the inside and outside temperatures.

The U-factor of an insulated garage door is affected by several factors, including the type of insulation, the thickness of the insulation, and the construction of the door. Fiberglass and polystyrene are common types of insulation used in garage doors. Fiberglass is less expensive than polystyrene, but polystyrene provides better insulation.

The thickness of the insulation is also important. The thicker the insulation, the better the insulation. However, thicker insulation can also make the door heavier and more expensive.

The construction of the door can also affect the U-factor. Doors made of steel are less insulated than doors made of wood or aluminum. Steel doors are also more likely to rust and dent.

When choosing an insulated garage door, it is important to consider the climate in which you live. If you live in a cold climate, you will need a door with a lower U-factor. If you live in a warm climate, you may be able to choose a door with a higher U-factor.

The following table provides a general guide to the U-factors of different types of insulated garage doors:

| Type of Insulation | U-Factor | |---|---| | Fiberglass | 0.30 - 0.45 | | Polystyrene | 0.20 - 0.35 | | Steel | 0.45 - 0.65 | | Wood | 0.35 - 0.55 | | Aluminum | 0.40 - 0.60 |

By choosing an insulated garage door with a low U-factor, you can reduce heat loss and save energy. You can also make your garage more comfortable in both the summer and winter.