Insulated Steel 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 door r value.

All doors are tested in accordance with astm c1363 and sdi 113. In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation. B18 series steel stiffeners u factor 0 50 r value 2 01. 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.

Mulitple surface options embossed wood grain microgroove wave pattern and smooth. 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. 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.

A 2 1 4 inch solid core wooden door for example has an r value of 3 70. Solar heat gain coefficient shgc a measure of how well a glazed door assembly absorbs or reflects heat from the sun. 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. Model 5740 17 5 r value.

In new homes especially in cold climates in very energy efficient buildings look for the best performance doors possible. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. Overhead door corporation uses a calculated door section r value for our insulated doors. We have several door styles to meet your insulated door needs for both residential and commercial applications.

Polyurethane garage door insulation provides thermal efficiency 9 31 r value. 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. 1 u value r value. Steel backing for clean finished interior appearance.

Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric. Glazed doors in hot or temperate climates should have a low shgc. South facing glazed doors in cold climates should. 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.