When choosing doors and windows for your project, the importance of quality glass can’t be overstated. We’re constantly keeping a pulse on the current advancements in glass, evolving to meet strict energy requirements, and making sure your products are cutting-edge, so you don’t have to.
But the real difference maker is the unique strength of our steel. Our steel frames allow the use of thin profiles, which means expansive glass for a more expansive view. Our systems can accept near limitless configurations of glass, all NFRC certified, allowing glass with a thickness up 1-¼”. Single pane, Laminated, Dual Pane IGU and Triple Pane IGU’s are all available to meet today’s strictest building envelope requirements.
And while others would leave the crucial phase of glazing to a third party, we hold ourselves to a higher standard–hand inspecting every piece of glass that enters our shop and glazing each unit in-house using only the highest quality dow corning 795 silicone on the interior and exterior of each product.
With Steel Traditions, your focus can stay where it always should be–getting the aesthetics of your design just right.


This summary is a brief guideline on the ASTM Glass Imperfection Standards. Glass is not made to look at, it is made to look through. All glass is imperfect. For this reason, the industry has ASTM standards that define what is a defect, and what is allowable.
Anyone can find imperfections in glass if they look hard and close enough. Glass is used in both commercial and residential settings and as a result, customers set high expectations for products used in the construction industry. Glass is not perfect and the larger the piece of glass is, the less perfect it can be. To determine what is an acceptable defect and what is not, you need to perform the following: 
  • Stand 10 feet away from the glass.

  • Face the glass straight on at 90 degrees.

  • View the glass in daylight, not direct sunlight.

  • Inspect 80% of the central portion of the glass.

  • Inspection should not exceed viewing of more than the following in transmission or reflection.

    • 5 seconds for lites up to 6 sf.
    • 10 seconds for lites up to 35 sf.
    • 20 seconds for lites greater than 35 sf.

Under these conditions, if you cannot see the defect from 10 feet away, the ASTM standard states it is not a defect. If defects are visible beyond what is allowable as listed above, the glass maybe rejected. Defects include scratches, seeds, bubbles, debris, stones, shells, chips and spots.

ASTM International

ASTM International is the basis for understanding glass and coating quality, allowable defects, and visual inspection criteria.  ASTM has many different specifications and classifications depending on the type of glass being analyzed or quality controlled.   Some examples of coating quality criteria are:



2023 © Steel Traditions. All Rights Reserved.

2022 © Steel Traditions. All Rights Reserved.