Insulated Sectional Steel Doors

Commercial Sectional Door

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

insulated-sectional-steel-door-model-530

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"

insulated-sectional-steel-door-model-5155-5255

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"

insulated-sectional-steel-door-model-530

ThermoMark™ 530

R-value*: 26

Section Thickness: 3″
Integrated Struts​: No
Max Standard Width​: 40’2″
Max Standard Height​: 24′

Thermospan® 200-20

R-value*: 17.5
Section Thickness: 2″
Integrated Struts​: Yes
Max Standard Width​: 24’2″
Max Standard Height​: 16’1″
rolling-service-door-model-800c

Thermospan® 200

R-value*: 17.5
Section Thickness: 2″
Integrated Struts​: Yes
Max Standard Width​: 40’2″
Max Standard Height​: 32’1″
rolling-service-door-model-800

ThermoMark™ 5150 & 5200

R-value*: 5150 = 12.12
5200 = 16.22
Section Thickness: 1-3/8″
1-7/8″
Integrated Struts​: No
Max Standard Width​: 20’2″
26’2″
Max Standard Height​: 20’1″
rolling-service-door-model-900

ThermoMark™ 5155 & 5255

R-value*: 5155 = 12.12
5255 = 16.22
Section Thickness: 1-3/8″
1-7/8″
Integrated Struts​: No
Max Standard Width​: 20’2″
26’2″
Max Standard Height​: 20’1″

Thermospan® 150

R-value*: 14.16
Section Thickness: 1-1/2″
Integrated Struts​: Yes
Max Standard Width​: 26’2″
Max Standard Height​: 20’1″

Thermospan® 125

R-value*: 10.79
Section Thickness: 7/8″
Integrated Struts​: Yes
Max Standard Width​: 18’4″
Max Standard Height​: 16’1″

*Wayne Dalton uses a calculated door section R-value for insulated doors.