Insulated Steel Door R Value

The lower the coefficient the better the glazed door is at blocking the sun s heat.

Insulated steel door r value.

The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. Many building owners spend millions of dollars a year on energy bills and the trio e represents a chance for them to realize significant savings on a new or. 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.

South facing glazed doors in cold climates should. In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation. Mulitple surface options embossed wood grain microgroove wave pattern and smooth. We have several door styles to meet your insulated door needs for both residential and commercial applications.

Overhead door corporation uses a calculated door section r value for our insulated doors. B18 series steel stiffeners u factor 0 50 r value 2 01. Polyurethane garage door insulation provides thermal efficiency 9 31 r value. 1 u value r value.

Model 5720 12 76 r value. U value is a measure of the flow of heat through an insulating or building material. The lower the u value the better the insulating ability. Model 5740 17 5 r value.

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. All doors are tested in accordance with astm c1363 and sdi 113. 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.

While this remains the industry standard we are seeing more specs with the latest standards for thermal transmittance astm c1363 and air. The trio e door is steel stiffened for strength but has achieved an operable u factor of 0 36 which is better than most other steel stiffened doors currently available on the market today. 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. A 2 1 4 inch solid core wooden door for example has an r value of 3 70.