Thermacore® Sectional Steel Door - 598 Model 598

Thermacore® Sectional Steel Door - 598 Model 598

The Thermacore® Sectional Door Model 598 is a an exceptionally well-built door that provides a higher level of thermal protection than standard insulated doors. This premium insulated sectional door represents an economical choice for lighter-duty applications.

Ideal Applications Include


Product Specifications  
Standard Max Width 16'2" (4,928 mm)
Standard Max Height 14'1" (4,293 mm)
Panel thickness 1" (25.4 mm)
U-factor* .20
R-value** 9.31 (1.64 W/m2)
Thermal break Hot melt
Exterior Steel .012" (.3 mm) galv.
Exterior Surface Ribbed, textured
Standard Springs 10,000 cycles

*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.


  • 8 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)

  • Ribbed Panel

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

Exterior Colors

  • white color swatch


  • Chain Hoist or Electric Operator is recommended for doors above 10’ tall or more than 400 pounds
  • Thermal glazing
  • High-usage components
  • Wind load options
  • Electric operator
  • Chain hoist
  • Posi-Tension™ drums
  • Safety bottom fixture
  • Flexible jamb, header seal
  • Photo eyes
  • Window Glazing Options