Exterior Hollow Metal Door R Value

The r values of most steel and fiberglass clad entry doors range from r 5 to r 6 excluding a window.

Exterior hollow metal door r value.

B18 series steel stiffeners u factor 0 50 r value 2 01. Hurricane rated up to 100 psf 3 0 x 7 0 single and up to 70 psf 8 0 x 8 0 pairs. In the chart above you will notice that there are two vastly different r values provided for insulated metal doors with polyurethane insulation. 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. L18 series per astm c1363 r factor 2 64 u factor 38 3. 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. 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.

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. Hollow metal doorswith this core type are most often used at exterior openings and can be fire rated up to 3 hours. Steel stiffened core for added strength and durability. The insulation value is much higher than the honeycomb but lower than the polyurethane.

Hollow metal doors are made of channel reinforced steel sheets and filled with insulation materials such as polystyrene kraft honeycomb or polyurethane. 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. Astm c518 calculated test method. Astm e283 cfm sq ft cfm ln ft all curries door construction with curries thermal break frame 0 04 0 06 door series core test method.

Door series core test method. The gray primer finish is suitable for painting. Standard metal doors are 1 3 4 thick and are prime coat painted. 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.

The lower the u value the better the insulating ability. If installed correctly and not bent this type of door needs no further weatherstripping.