Insulated Metal Door R Value

Factor the more effective the insulation of the material.

Insulated metal door r value.

In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation. The insulation value is much higher than the honeycomb but lower than the polyurethane. The lower the coefficient the better the glazed door is at blocking the sun s heat. B18 series steel stiffeners u factor 0 50 r value 2 01.

Other features may include screens with self. 0 17 u value r 5 9 metal w polyurethane core no storm. Overhead door corporation uses a calculated door section r value for our insulated doors. A 2 1 4 inch solid core wooden door for example has an r value of 3 70.

Metal w polyurethane core w storm. Metal framed storm doors might have foam insulation inside their frames. Similar to most other building products manufacturers the steel door institute has encouraged the practice of citing a calculated value. 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.

Hollow metal doors with this core type are most often used at exterior openings and can be fire rated up to 3 hours. Wooden storm doors require more maintenance than the other types. The insulation of the best doors is in the range of u 0 10 0 20 metric. Solar heat gain coefficient shgc a measure of how well a glazed door assembly absorbs or reflects heat from the sun.

Glazed doors in hot or temperate climates should have a low shgc. U value as you likely know can be converted to r value by dividing the u value into 1. 0 56 to 1 13 w m2k which is high compared to other doors but low compared to well insulated walls and attics with many inches of foam or mineral wool or other insulation material in their assemblies. South facing glazed doors in cold climates should.

Acca manual j table 4a lists many types of doors assigning each a u value. We have several door styles to meet your insulated door needs for both residential and commercial applications. The lower the u value the better the insulating ability. High quality storm doors use low emissivity low e glass or glazing.

The first level of insulated door core is the polystyrene which is a slab of foam that is placed in the core of the door. U factor r value u factor r value 707 polystyrene 0 16 6 4 0 37 2 7. For comparison with other materials a 2 inch thick metal door with a core composed of urethane foam insulation has an r. 1 u value r value.

U value is a measure of the flow of heat through an insulating or building material.