Insulated Metal Door R Value

For comparison with other materials a 2 inch thick metal door with a core composed of urethane foam insulation has an r.

Insulated metal door r value. U factor r value u factor r value 707 polystyrene 0 16 6 4 0 37 2 7. Glazed doors in hot or temperate climates should have a low shgc. Other features may include screens with self. The insulation of the best doors is in the range of u 0 10 0 20 metric.

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. Storm door frames are usually made of aluminum steel fiberglass or wood painted or not. The lower the u value the better the insulating ability. Wooden storm doors require more maintenance than the other types.

A 2 1 4 inch solid core wooden door for example has an r value of 3 70. The lower the u value the better the insulation. High quality storm doors use low emissivity low e glass or glazing. We have several door styles to meet your insulated door needs for both residential and commercial applications.

1 u value 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. U value as you likely know can be converted to r value by dividing the u value into 1. Similar to most other building products manufacturers the steel door institute has encouraged the practice of citing a calculated value.

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. All doors are tested in accordance with astm c1363 and sdi 113. Hollow metal doors with this core type are most often used at exterior openings and can be fire rated up to 3 hours. The lower the coefficient the better the glazed door is at blocking the sun s heat.

Metal w polyurethane core w storm. Factor the more effective the insulation of the material. B18 series steel stiffeners u factor 0 50 r value 2 01. 0 17 u value r 5 9 metal w polyurethane core no storm.

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. Acca manual j table 4a lists many types of doors assigning each a u value. Solar heat gain coefficient shgc a measure of how well a glazed door assembly absorbs or reflects heat from the sun. Metal framed storm doors might have foam insulation inside their frames.

The insulation value is much higher than the honeycomb but lower than the polyurethane.