Insulated Metal Door U Value

Pulse fiberglass steel doors.

Insulated metal door u value.

Polyurethane will have the. B18 series steel stiffeners u factor 0 50 r value 2 01. Standard metal doors are 1 3 4 thick and are prime coat painted. Hollow metal doors are made of channel reinforced steel sheets and filled with insulation materials such as polystyrene kraft honeycomb or polyurethane.

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. 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. Assemblies with lower u values transmit less heat than those with higher values. L18 series per astm c1363 r factor 2 64 u factor 38.

Please see the charts below for each product s specific u values. 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. The insulation of the best doors is in the range of u 0 10 0 20 metric. The gray primer finish is suitable for painting.

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. U value is a measure of the flow of heat through an insulating or building material. All doors are tested in accordance with astm c1363 and sdi 113. All k and u factor values are expressed in btu s hr ft2 f w m2 k.

The insulation value is much higher than the honeycomb but lower than the polyurethane. U value has an inverse relationship to r value. The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. We have several door styles to meet your insulated door needs for both residential and commercial applications.

R 1 u or t k where t is the thickness of the material involved. Materials possessing low k and u factor values are more efficient insulators than. A number which describes in specific terms the ability of a material or assembly to transmit heat from outside to inside surfaces. The lower the u value the better the insulating ability.

The greater the r factor or resistance the more effective the insulation of the material.