ThermoMark™ Model 5155 & 5255 Insulated Sectional Steel Doors
ThermoMark™ Models 5155 and 5255 insulated commercial sectional doors are extremely rugged and durable, with excellent thermal insulation qualities. For commercial projects that require a door with strength, insulation and an overall solid performance, these doors are the ideal choice.
Featuring CFC and HCFC-free polyurethane foam insulation, Models 5155 and 5255 are available with two different levels of thermal performance. The ThermoMark™ 5255 is rated with a U-value* of .0616 (R-value* of 16.22), while the ThermoMark™ 5155 has a U-value of .0825 (R-value* of 12.12).
The ThermoMark™ 5155 and 5255 both feature hot-dipped galvanized steel construction that is pre-painted prior to manufacturing with a two-coat system of polyester paint with a finished coat (includes primer). The inside and outside skins are roll-formed and separated with a thermal break to eliminate thermal conductance. Hinge locations have 20-gauge continuous back up plates for fastening. The bottom astragal is a two-piece bulb-type astragal to be attached to the interior skin. ThermoMark™ Models 5155 and 5255 section ends have end caps of 18-gauge hot-dipped galvanized steel, and a between-section joint seal is standard.
*Wayne Dalton uses a calculated door section R-value and U-value for insulated doors.
FeaturesKey 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.
The ThermoMark™ 5155 and 5255 meet IECC® requirements for maximum U-factor of operable fenestrations (2015 Section C402.4) with a 3rd party certified tested value of less than 0.37. ThermoMark™ 5155 and 5255 also meet the ASHRAE 90.1 and IECC® requirement for maximum air leakage for fenestration assemblies (2015 Section C402.5.2 Garage doors) with a 3rd party certified tested value of less than 0.40.
Door OptionsLite Options
Insulated Vision Lites allow for visibility while maintaining security. Full-view sections allow for maximum natural light and visibilityOptions & 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
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