Insulated Steel Entry Door R Value

A 2 1 4 inch solid core wooden door for example has an r value of 3 70.

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. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Entrance door outside door right hand inswing front doors classic front doors 4 foot exterior french doors praying exterior. The 1 3 4 thick doors help you save energy and provide a protected more comfortable interior environment.

B18 series steel stiffeners u factor 0 50 r value 2 01. Overhead door corporation uses a calculated door section r value for our insulated doors. 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. For comparison with other materials a 2 inch thick metal door with a core composed of urethane foam insulation has an r.

The lower the u value the better the insulating ability. 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. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. 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.

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. Even the best entry doors have relatively modest insulation levels. 1 panel 750 12 panel 20 2 panel 1864 3 panel. All doors are tested in accordance with astm c1363 and sdi 113.

6 panel primed right hand inswing steel prehung front door w brickmould model thdjw166100278. U value is a measure of the flow of heat through an insulating or building material. Best seller jeld wen 36 in. In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation.

These insulated steel 700 series doors stand up to the elements while dramatically decreasing exterior noise and enhancing the overall aesthetics of your building.