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What type of core should I have in my hollow metal door?



The appropriate core will depend on the application. The four most common core types that are used in hollow metal doors are:

1) Honeycomb core doors are generally the least expensive. They consist of a “honeycomb” pattern of cardboard or fiberboard between the two faces of the door and are used in applications where temperature insulation is not necessary.
2) Polystyrene core doors offer a degree of added insulation, and are generally acceptable as an exterior door in temperate areas.
Polyurethane core doors offer the most efficient temperature insulation, and are recommended for exterior openings in cold-weather regions.
3) Steel stiffened core doors contain vertical steel studs and are recommended for openings that either see a lot of abuse or require added security, such as loading docks, confinement applications, or military base installations.

Contact your local IDN branch for additional information.

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