Design Line Steel Doors & Windows


  • All steel doors and windows are custom crafted for each project
  • Cad drawings are done for each project
  • Engineering available, if necessary
  • Solid steel fabrication
  • Narrow sight-lines for old-world charm
  • Our construction process minimizes joints and seams
  • All doors and windows can be “sash” set to minimize sight-line differences between operable and fixed units
  • Door and window frames/ sashes vary from 3/16” thick to ½” thick solid steel
  • Solid flat bar construction offers cleaner and finer corners and edges
  • All operable door and window units are hand-crafted to customers’ choice of hardware
  • Cedar Mill offers installation
  • Minimal field assembly required, if any
  • Our doors & windows are NOT thermally broken, although rare may sweat under extreme conditions.


  • All glass is in Cardinal LowE 366
  • Black, bronze, and silver spacer bars available
  • Solid steel exterior “angle stops” or “square stops” (glazing beads) allow for easy re-glazing or maintenance


  • Custom color match for each project
  • All finishing is done in a controlled environment
  • Our finishes offer simple field touch-up for easy repair of wear and tear
  • High quality, catalyzed, polyurethane finish provides excellent hardness, adhesion, and abrasion resistance
  • All steel is sandblasted and zinc coated, to essentially prevent rusting prior to finishing

Made in Houston, TX

Cedar Mill Co. Inc.

Cedar Mill Co. Inc.

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