Insulated Sectional Steel Doors ThermoMark™ Model 5255

Key Product Features

• Max Width: 20’2” (5155) and 26'2" (5255)
• Max Height: 20’1”
• 27-gauge exterior steel
• Polyurethane insulation, R-value*=12.12 (5155) and 16.22 (5255)
• 1-3/8” (5155) and 1-7/8" (5255) section thickness
• Continuous steel strips for hinge attachment
• Stucco embossed exterior with pinstripes

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

Options & Accessories

• Chain hoist operation
• Motor operation
• High cycle springs (25k, 50k, 100k)
• 3” track
• Solid shafts
• Perimeter weatherseal
• Broken cable devices
• Sensing edges
• Photo eyes
• Special track designs
• Mullions

Impact Panel

• Wayne Dalton’s optional Impact Section replaces the traditional bottom section on doors exposed to damage from forklifts and other warehouse traffic.
• Reduces downtime and costly repairs
• Impact-Resistant composite skins surround an expanded polystyrene core
• Fully adaptable to multiple door thicknesses with hinge and section adapters to provide a superior fit
• Available for 21" and 24" sections
• Available from 8’2” to 16’2” wide in one-foot increments