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Fortis Doors leads the industry in the manufacture of fire doors, and we pride ourselves on integrating cutting-edge technology to maximize energy efficiency. Our Imperial model hollow steel metal doors feature an in-situ expanded polyurethane core that ensures an outstanding level of energy efficiency.

The meticulously applied foaming process eliminates any gaps or voids inside the door, resulting in exceptionally uniform and smooth surfaces. This design not only contributes to energy efficiency, but also provides a high-quality finish that stands the test of time. At Fortis Doors, we are dedicated to providing solutions that not only meet the highest safety standards, but also excel in performance and durability.

  • 1-3/4″ thick
  • Cold rolled steel face skin
  • 18 gauge face skin
  • Mechanically interlocked construction
  • Hemmed edge design
  • Handed door design
  • Polystyrene core
  • Maximum opening size, 4′ x 10′ single
  • Maximum opening size 8′ x 10′ pair
  • Factory applied rust inhibiting primer finish
  • Fire Rated up to 3 hours
  • STC 27 Rating
  • 0.43 Thermal U-Factor
  • 2.33 Thermal R-Value
  • 7 gauge hinge reinforcement
  • Mechanically interlocked, hemmed vertical edge seam for strengh and rigidity.
  • Polystyrene core provides insulation characteristics and resistance to impact.
  • Core is chemically bonded providing total surface support.
  • Cold rolled, A60 galvannealed or G90 galvanized steel face skins
  • Flush, Vision Lite, Narrow Lite, Half Glass, Full Glass or Louver or Embossed 1, 2, 6 or 8 panel door design
  • Hemmed or seamless edge design
  • 20, 18, 16 and 14 gauge face skins
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