Steel Sectional Doors

591 Series – Thermacore Door

The 591 Series is the best-selling door in the Thermacore line, offering superior thermal efficiency for a wide range of residential and commercial applications. Its exterior skin is constructed of galvanized steel with a ribbed, textured finish, combining durability with a clean architectural look.

It is available with a white interior finish and either a white or Industrial Brown exterior.

Key Features & Options

  • Thermal glazing available for improved energy efficiency
  • Optional four-section pass door
  • High-usage components for demanding environments
  • Electric operator option for automated operation
  • Chain hoist operation available
  • Posi-Tension drums for improved balance and performance
  • Safety bottom fixture for added protection
  • Bottom-sensing edge for enhanced safety
  • EPDM rubber header seal for improved insulation
  • Aluminum sash section available up to 22’2″ (6,756 mm) width
  • Exhaust ports for ventilation options

Performance & Specifications

Panel Thickness: 1 5/8″ (41 mm)

R-Value: 14.86 (2.63 W/m²K)
U-Value: 0.067 (0.380 W/m²K)

Air Infiltration:

  • At 15 mph (24 km/h): 0.08 cfm (2.26 Lpm)
  • At 25 mph (40 km/h): 0.08 cfm (2.26 Lpm)

Thermal Break: PVC

Wind Load: Meets ANSI/DASMA 102-1996

Exterior Steel: 0.016″ (0.41 mm) galvanized

Exterior Surface: Ribbed, textured

Standard Spring Cycle: 10,000 cycles

Maximum Size:

  • Width: 35’2″ (10,719 mm)
  • Height: 24’1″ (7,341 mm)

Colors:

  • Exterior: White or Industrial Brown
  • Interior: White

Warranty: 10-year delamination limited warranty

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