
Krieger Specialty Products
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Custom manufactured True Thermal Break assembly including: door, frame, and hardware. U-Value .504. R-Value 2.0. Tested and Certified according to ASTM C236-80 Clients include Conoco, City of Anchorage, City of Fairbanks, BP Explorations and Elmer Candy Corp.

Stiles Custom Metal ![]()
Stiles builds doors to your exact specifications. Our thermal shielding doors – available with urethane or polystyrene cores – feature a U-factor of .141 BTU/hr. or an R-value of 7. Producing the finest built-to-order steel doors and window systems in the world, Stiles consistently delivers on-time and at a reasonable cost.