Blacksteel Finishes

“Design is where science and art break even.” — Mieke Gerritzen

Zinc Galvanized Steel

Zinc Galvanized Steel

Zinc galvanizing is by far the most effective way of protecting steel from corrosion.  When treated in this way, steel will outlast and out perform any other fenestration material. We use ‘Zinc Thermal Spraying’, which is a process where zinc is melted and then sprayed onto a prepared substrate. Thermal spraying is a highly effective and proven method of corrosion prevention, providing galvanic as well as barrier coating protection to steel. 

Our 11 Stage Process

The steel with which we fabricate or products is initially ‘Electro Galvanized’ to protect it from corrosion during the fabrication process. After fabrication is complete, all surfaces are sand blasted in preparation Zinc Thermal Spraying. The resulting surface is slightly rough, providing  an optimal “key” for subsequent priming, painting and surface finishing. Although an expensive and time consuming process, it guarantees a lifetime of protection against corrosion under all weather conditions. 

  • Zinc Electroplated steel is cut & Tig welded to create frames, slabs and sashes.
  • Rough grinding to remove high points at weld junctures
  • Flame applied Zinc galvanizing
  • Base primer applied & oven baked
  • Filler coats of thicker coating 
  • Fine grade sanding to make surface perfectly smooth
  • 2 coats of Undercoat for further protection
  • A second baking at 140º to bond sub layers together
  • Application of top coat (choice of final color)
  • 2 applications of Clear Coat – Hard as Nails finish with soft sheen
  • Final baking to harden the surface for a permanent, maintenance free surface

Marine Grade Finish

Blacksteel Architectural uses AkzoNobel marine coatings, which have been protecting ships for over 140 years. This product has superb protective qualities with superior abrasion and chip resistance. Our marine grade finish protects steel from scratches, dents or other damage that commonly affects all other types of fenestration. After thermal zinc galvanization, we employ a multi-step process that incrementally adds color while it perfects and hardens the surface. We use three layers of marine grade paint and then two additional layers of clear coating for UV protection. This gradual layering process creates a “hard as nails” finish with a deep, lustrous color and enduring sheen. The final coating reaches a pencil hardness of 6H – the highest in the industry. To our knowledge, no other company employs such a labor intensive process to ensure that your windows and doors remain blemish free and lustrous for a lifetime of service. 

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Color Choices

Color Choices

The majority of our clients prefer the traditional look of black steel framed windows and doors. This color choice has been preeminent throughout the centuries, since steel became a primary material for building. However, we are able to match any color you wish if you have a special color preference. Please let your Blacksteel project manager know if you have a custom color in mind. Otherwise, the steel frames for your doors and windows will be treated with traditional and beautiful, 15% sheen black. 


We use TIG welding to construct all steel frames for our windows and doors. TIG welding is a much more difficult and time consuming process than MIG welding. TIG welding requires more skill and more patience than MIG welding. However, TIG creates smoother, stronger welds with less heat, less splatter and less distortion. TIG welding is also better for the environment, and because fewer fumes are generated, it’s better for the health of our technicians. Our highly skilled fabrication artisans allow us to keep dimensional tolerances to 1mm (1/25”) – which is significantly smaller than the standards in our industry. We go to this extra effort because even though you can’t see the extra effort, it guarantees that not only is your product beautiful, but it will fit exactly into the opening it was designed for. In cases of Historic renovations when sizing is all slightly variable, this extra attention is crucial. 

Hot/Cold Rolled Steel

Some companies make much of the fact that they use cold rolled steel and frankly, it’s a non-issue. Almost all companies who make windows and doors use cold rolled steel because it is the  superior product. The difference between the two steels is that Hot Rolled steel is rolled to its final dimensions while hot, whereas a cold rolled product can be finished to much closer tolerances right in the sizing rollers. The cold rolling process produces steel with much higher strength and hardness than the steel produced by the hot rolling process. Hot rolled steel tends to have very rough surfaces whereas cold rolled steel has a shiny and smooth surface that allows it to be used as-is in production operations. These two steel types should not be confused with the technical specifications or grades used to classify steel by composition or physical characteristics. Blacksteel uses the highest grade of steel manufactured for the stress and demands of this type of building. C25.fhipv 


Need an elegantly built custom made Door and Window solution?

Contact our team to discuss a solution tailored to your needs. 

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