What cores are offered for insulated doors?

Insulated Core Options:

  1. 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.

  2. Steelcraft CE-Series embossed panel door has a Polystyrene core as standard. Optional cores are not available.

  3. 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:

  1. Polystyrene core - this core is available in fire rated doors up to 3 hours depending on door series, glass designs and hardware applications.

  2. Polyurethane core - this core is not available as a fire rated doors regardless of door construction.

Polyisocyanurate is another name for polyurethane.


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