Insulated Steel Door R Value

1 u value r value.

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

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. U value is a measure of the flow of heat through an insulating or building material. Mulitple surface options embossed wood grain microgroove wave pattern and smooth. 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. 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. Model 5720 12 76 r value. Look for a door with a good insulation value say a u value of at least 0 2 that is r 5 metric.

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. The lower the u value the better the insulating ability. The lower the coefficient the better the glazed door is at blocking the sun s heat. In new homes especially in cold climates in very energy efficient buildings look for the best performance doors possible.

Model 5740 17 5 r value. Steel backing for clean finished interior appearance. While this remains the industry standard we are seeing more specs with the latest standards for thermal transmittance astm c1363 and air. Glazed doors in hot or temperate climates should have a low shgc.

Polyurethane garage door insulation provides thermal efficiency 9 31 r value. All doors are tested in accordance with astm c1363 and sdi 113. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. 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.