Insulated Sectional Steel Door

Thermospan® Model 200-20 is the ideal commercial sectional door for energy-conscious architects, engineers, contractors, and building owners.  With a U-value• of .057 and R-value* of 17.5, this door outperforms most conventional insulated doors.

The Wayne Dalton Thermospan® Series doors are the only sectional doors in the industry with patented, roll-formed integral struts on each section, making them the most rigid doors available.  The Thermospan® Series also has a patented manufacturing process with a polyurethane core that is continuously foamed-in-place between the outer and inner skins.  An innovative thermal break keeps the interior skin at room temperature, preventing condensation and frost and helping to resist corrosion.

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

insulated sectional steel doors
Door Options

Lite Options:




Insulated Vision Lites allow for visibility while maintaining security.  Full-view sections allow for maximum natural light and visibility.

Options & Accessories:


Pass door

Chain hoist operation

Motor operation

Sensing edges

Photo eyes

High cycle spring (25k, 50k, 100k)

3" track option

Solid shafts

Perimeter weather seal

Special track designs


Vision Lites

Full-View Lites

Static and Impact Wind Load designs are certified by the state of Florida (FBC), the Texas Department of Insurance (TDI), and the designs are compliant with the 2015 IBC.  No Miami-Dade certifications.

Highest Quality Standards

Max Width: 24' 2" / Max Height: 16' 1"

20-gauge exterior steel

Polyurethane insulation, R-value* = 17.5; U-value* = .057

2" section thickness

10,000 cycle standard spring

Patented, roll-formed integral struts for rigidity

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

Door Construction:

1. Joint seal prevent air infiltration and saves energy

2. Thermal break separates inner and outer skins so virtually no heat or cold is conducted through the section

3. Pre-painted inner and outer skins for added corrosion resistance

4. Solid polyurethane core provides maximum thermal efficiency and aids in quiet operation

5. Integral struts - Two 1-3/4" roll-formed struts per section increase rigidity and strength

6. Two-inch nominal thickness

7. Heavy-duty 20-gauge smooth flush exterior skin gives the Thermospan 200-20 added strength and makes it ideal for large openings

IECC® Compliant:

The Thermospan® 200-20 meets IECC® requirements for maximum U-factor of operable fenestrations (2015 Section C402.4) with a 3rd party certified tested value of less than 0.37.  Thermospan® 200-20 also meets the ASHRAE 90.1 and IECC® requirement for maximum air leakage for fenestration assemblies (2015 Section C402.5.2 Garage doors) with a 3rd party certified tested value of less than 0.40.



Custom Color:

This model is available with the TruChoice™ Color System.  Wayne Dalton's custom painting process that offers more than 6,000+ colors.

Online color swatches are only digital reproductions of actual standards and will vary in appearance due to differences in monitor and video card output.  These digital representations should not be used to finalize color selection(s).  Please reach out to us to discuss actual color samples to match your preferences.

Contact Information

2 Lukens Dr.

New Castle, DE 19720

Suite 600

Call Us: 1-888-927-3835


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