Insulated Sectional Steel Doors
Whether your commercial door application calls for first-rate thermal efficiency, has stringent wind load requirements, or requires a custom oversized door, we have the door for you. From our extremely efficient and durable Thermospan® line of doors to our economical steel sectional doors, every door is engineered and built to provide ultimate quality. With Wayne Dalton, you get more insulation choices, including the highest R-value rating available in a standard design and the widest range of design and performance options in any commercial sectional door offering.
The following chart can help you determine which Wayne Dalton Sectional Steel door is best for your specific application. Larger sizes may be available.
R-value*
Section Thickness
Integrated Struts
Max Standard Width
Max Standard Height
ThermoMark™ 530
26
3"
No
40'2"
24'
Thermospan® 200-20
17.5
2"
Yes
24'2"
16'1"
Thermospan® 200
17.5
2"
Yes
40'2"
32'1"
ThermoMark™ 5150 & 5200
5150 = 12.12 5200 = 16.22
1-3/8"
1-7/8"
No
20'2"
26'2"
20'1"
ThermoMark™ 5155 & 5255
5155 = 12.12 5255 = 16.22
1-3/8"
1-7/8"
No
20'2"
26'2"
20'1"
Thermospan® 150
14.16
1-1/2"
Yes
26'2"
20'1"
Thermospan® 125
10.79
7/8"
Yes
18'4"
16'1"
ThermoMark™ 530
R-value*: 26
Thermospan® 200-20
Thermospan® 200
ThermoMark™ 5150 & 5200
5200 = 16.22
1-7/8″
26’2″
ThermoMark™ 5155 & 5255
5255 = 16.22
1-7/8″
26’2″
Thermospan® 150
Thermospan® 125
*Wayne Dalton uses a calculated door section R-value for insulated doors.