Thermacore® Sectional Steel Door - 599 Model 599

Thermacore® Sectional Steel Door - 599 Model 599

With a U-factor of .10 (R-value of 17.5), and one of the best overall air infiltration ratings in the industry, the Thermacore® Sectional Steel Door Model 599 is one of the most thermally efficient door systems in its class. The Model 599 doors also carry a Class 26 sound transmission rating for applications where sound suppression is desirable.

The Thermacore® line features steel-polyurethane-steel panel construction which provides a thermal barrier that withstands extremely hot or cold climates and the most demanding environmental requirements.

Ideal Applications Include


Product Specifications 
Standard Max Width40'2" (12,243 mm)
Standard Max Height32'1" (9,779 mm)
Panel thickness2" (51 mm)
R-value**17.5 (3.09 W/m2)
Sound Transmission Class 26Ideal for applications that require sound control
Air infiltrationat 15 mph (24 kmph) .08 cfm/ft2 (1.46 m3/hr/m2)
Thermal breakPVC
Exterior Steel.015" (.38 mm) galv.
Exterior SurfaceFlush, textured
Standard Springs10,000 cycles
Wind LoadDesigns available for usage in high-wind conditions

*U-factor values are independently tested and verified per ANSI/DASMA 105.
**Overhead Door™ brand uses a calculated door section R-value for our insulated doors.


  • 10 year limited delamination
  • 1 year limited on door
  • 3 year/20,000 cycle limited on door & operator system (when purchased together; on material and workmanship)
  • 20 year limited on high performance fluoropolymer coating option

Exterior Colors

  • white color swatch


Actual door color may vary slightly from the digital representation above. Color samples are available by request through your Overhead Door™ Distributor.

  • Chain Hoist or Electric Operator is recommended for doors above 10’ tall or more than 400 pounds
  • Aluminum sash section available up to 24'2" (7,366 mm) wide
  • Insulated glass, tempered glass, polycarbonate, multi-wall polycarbonate, etc.
  • Four-section pass door
  • High-usage package
  • Wind load options
  • Electric operator
  • Chain hoist
  • Posi-Tension™ drums
  • Safety bottom fixture
  • Bottom-sensing edge
  • Flexible jamb, header seal
  • Exhaust ports
  • Impact Section Available