Insulated Steel Entry Door R Value

While this remains the industry standard we are seeing more specs with the latest standards for thermal transmittance astm c1363 and air.

Insulated steel entry door r value.

U value is a measure of the flow of heat through an insulating or building material. Overhead door corporation uses a calculated door section r value for our insulated doors. 1 panel 750 12 panel 20 2 panel 1864 3 panel. We have several door styles to meet your insulated door needs for both residential and commercial applications.

Based on astm c518 calculation method the door has an r value of up to 11 but using astm c1363 tested operable the same door only have an r value of up to 3 5. Entrance door outside door right hand inswing front doors classic front doors 4 foot exterior french doors praying exterior. For comparison with other materials a 2 inch thick metal door with a core composed of urethane foam insulation has an r. Similar to most other building products manufacturers the steel door institute has encouraged the practice of citing a calculated value for thermal performance of the cores in the doors u and r values.

In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation. For example a 1 1 2 inch 3 81 cm thick door without a window offers more than five times the insulating value of a solid wood door of the same size. These insulated steel 700 series doors stand up to the elements while dramatically decreasing exterior noise and enhancing the overall aesthetics of your building. All doors are tested in accordance with astm c1363 and sdi 113.

B18 series steel stiffeners u factor 0 50 r value 2 01. A 2 1 4 inch solid core wooden door for example has an r value of 3 70. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. The lower the u value the better the insulating ability.

Best seller jeld wen 36 in. The 1 3 4 thick doors help you save energy and provide a protected more comfortable interior environment. The fact that an exterior door is made of solid wood or steel with a layer of polyurethane does not mean that the door has a good insulation value. 6 panel primed right hand inswing steel prehung front door w brickmould model thdjw166100278.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.