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Thermacore® Sectional Steel Doors 599

sectional doors used on building
​​​​​​​​​​​​​​​​​​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.

Standard max width
40'2" (12,243 mm)

Standard max height
32'1" (9,779 mm)

Panel thickness
2" (51 mm)


17.5 (3.09 W/m2)

Sound Transmission Class 26
Ideal for applications that require sound control

Air infiltration
at 15 mph (24 kmph) .08 cfm/ft2 (1.46 m3/hr/m2)

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

Thermal break

Exterior Steel
.015" (.38 mm) galv.

Exterior Surface
Flush, textured

Standard Springs
10,000 cycles

Wind Load
Designs available for usage in high-wind conditions

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 ​​

Door Options
​​​Door Options
  • 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​​

Exterior Color

  • white color swatch White

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

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