Insulated Steel Door U Value

For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09.
Insulated steel door u value. Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. The lower the u value the better the insulating ability. The lower the u value the more effective the insulation of the material. While this remains the industry standard we are seeing more specs.
B18 series steel stiffeners u factor 0 50 r value 2 01. U value has an inverse relationship to r value. We have several door styles to meet your insulated door needs for both residential and commercial applications. 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.
All doors are tested in accordance with astm c1363 and sdi 113. U value is a measure of the flow of heat through an insulating or building material. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. Pulse fiberglass steel doors.
A number which describes in specific terms the ability of a material or assembly to transmit heat from outside to inside surfaces. Overhead door corporation uses a calculated door section r value for our insulated doors.