Exterior Hollow Metal Door R Value

Rustica s french style sliding barn doors entry doors and rustica s replacement windows have the most efficient r value on the market listed at 3 94 for interior doors and replacement windows and 5 31 for a 2 1 4 exterior door.

Exterior hollow metal door r value. All doors are tested in accordance with astm c1363 and sdi 113. The gray primer finish is suitable for painting. We have several door styles to meet your insulated door needs for both residential and commercial applications. One of the lowest operable u factor in the industry for a steel stiffened door u factor 36 first steel stiffened hollow metal swinging door to qualify for greenguard gold.

The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window. L18 series per astm c1363 r factor 2 64 u factor 38 3. Tb ceco thermal break frame kerf ceco weather kerf frame hm ceco standard hollow metal frame fiberglass reinforced polyester door series core frame test methodology a stmc1 36op er ab l5 8 cu t dinp u factor r value u factor r value u factor r value frp polyurethane tb 0 35 2 9 0 12 8 0 0 26 3 8 frp polyurethane hm 0 38. 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.

Astm c518 calculated test method. Astm c1363 operable u factor r value u factor r value 707 polystyrene 0 16 6 4 0 37 2 7 707 polystyrene 0 16 6 4 0 45 2 2. Hurricane rated up to 100 psf 3 0 x 7 0 single and up to 70 psf 8 0 x 8 0 pairs. Standard metal doors are 1 3 4 thick and are prime coat painted.

The insulation value is much higher than the honeycomb but lower than the polyurethane. U value is a measure of the flow of heat through an insulating or building material. Steel stiffened core for added strength and durability. Overhead door corporation uses a calculated door section r value for our insulated doors.

Hollow metal doors are made of channel reinforced steel sheets and filled with insulation materials such as polystyrene kraft honeycomb or polyurethane. If installed correctly and not bent this type of door needs no further weatherstripping. B18 series steel stiffeners u factor 0 50 r value 2 01. 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.

The lower the u value the better the insulating ability. Hollow metal doorswith this core type are most often used at exterior openings and can be fire rated up to 3 hours.