Steelcraft L-Series doors are available with the following 2 optional insulated cores:
Polystyrene slab - this core is available in non fire rated and fire rated doors up to 3 hours.
Polyurethane slab - this core is available in non fire rated doors only.
Steelcraft CE-Series embossed panel door has a Polystyrene core as standard. Optional cores are not available.
Steelcraft B-Series steel stiffened door has fiberglass batting between stiffeners. Optional cores are not available.
Steel stiffened doors are not considered insulated doors even though they includes fiberglass batt insulation as part of the standard construction
Fire Rated Options:
Polystyrene core - this core is available in fire rated doors up to 3 hours depending on door series, glass designs and hardware applications.
Polyurethane core - this core is not available as a fire rated doors regardless of door construction.
Polyisocyanurate isanother name for polyurethane.
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