Security · 8 min read
Safety glazing, “tempering film” and building code questions
Last revised October 26, 2026 · Published by Shore Tint & More, a 3M Authorized Window Film Dealer. Editorial disclosure
What safety glazing rules are about
Building codes require safety glazing in locations where people are likely to contact glass — for example many doors, sidelights, glass near floors, bathtubs and showers, stairways and some large panes. The goal is that if the glass breaks, it breaks in a way less likely to cause serious cuts. Which locations require it, and which exceptions apply, depends on the code edition your jurisdiction has adopted.
Safety glazing is typically tempered glass, laminated glass, or another product that has been tested and labeled to a recognized impact standard.
What film does — and doesn't — change
- Film does not change the glass itself. Annealed glass with film is still annealed glass; it is not “tempered.”
- Safety films can help hold fragments together if glass breaks, which is a real hazard-reduction benefit.
- Some film-and-glass combinations have been tested to impact standards such as ANSI Z97.1 or the federal 16 CFR 1201 safety glazing standard. Those results apply to the specific film, glass type and thickness, and test configuration documented — not to film in general.
- Labeling requirements also matter: permanent marks on safety glazing are part of how inspectors verify it.
Who decides
The authority having jurisdiction (AHJ) — usually the local building department or code official — decides whether a retrofit is acceptable in a location that requires safety glazing. Some will accept documented film systems in certain situations; others will require replacement glass. A film installer or a website cannot make that determination for you.
Documents to ask for
- The exact film product name and thickness.
- Test reports showing the standard, test category and the glass type/thickness tested.
- Manufacturer installation instructions the test assumed.
- Any labeling the manufacturer provides for filmed glass.
- Written confirmation from your code official if the opening requires safety glazing.
FAQ
Can film replace tempered glass in my shower door?
Don't assume so. A shower enclosure that requires safety glazing should be addressed with the code official; film alone is not a substitute for certified glazing unless the AHJ accepts documented test results.
Is “tempering film” a real thing?
The term is marketing shorthand. Film can add fragment retention, but it does not temper glass.
Will an inspector accept film?
Only your local authority can answer that, and usually only with product- and glass-specific test documentation.
Sources & further reading
Product descriptions are summarized from manufacturer materials. We don't reproduce performance figures; request the current data sheet for any product you're quoted.