The five most common cores are honeycomb, polystyrene, polyurethane, steel stiffened, and temperature rise.
Honeycomb core doors are used for interior and exterior openings where high thermal insulation is not required.
Steelcraft L-Series - standard core
Steelcraft SL-Series - standard core
Steelcraft H-Series - standard core
Steelcraft A14-Series - standard core
Fire rated (without temperature rise) as an option
This is a laminated door construction
Polystyrene core doors are suitable for applications requiring an U-Factor or R-value (a measure of insulating performance).
Steelcraft L-Series - optional core
Steelcraft SL-Series - optional core
Steelcraft H-Series - optional core
Steelcraft CE-Series - standard core
Steelcraft HE-Series - standard core
Fire rated (without temperature rise) as an option
This is a laminated door construction
Polyurethane core doors are suitable for exterior openings in cold climates.
Steelcraft L-Series - optional core
Steelcraft H-Series - optional core
Not available fire rated
This is a laminated door construction
Steel stiffened core doors feature steel ribs in the interior of the door and are used where durability and security are important.
Steelcraft B-Series - standard core
Steelcraft H-Series - optional core
Fire rates (without temperature rise) as an option
This is a welded door construction
Temperature Rise core doors are used when a fire resistance rating is required to retard the transfer of heat from one area to another (a stairwell, for instance).
Steelcraft T-Series- standard core
Steelcraft TH-Series- standard core
Fire rated with temperature rise
This is a laminated door construction
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