How to Tell Tempered Glass From Annealed Glass

Look for an etched 'TEMPERED' or ANSI Z97.1 mark in one corner of the glass. Tempered is required by code for any glass within 24" of a door.

This is one of the most common questions we get from homeowners across Jacksonville, St. Augustine, Palm Coast, and Daytona Beach. Sliding glass doors are simple machines, but their failure modes aren't always obvious.

The key thing to remember is that the door panel itself - the frame and glass - almost never needs replacing in residential service. It's the moving components (rollers, locks, weatherstripping, IGU seals) that wear out predictably and are designed to be serviced separately.

Most homeowner-level sliding glass door work needs only a Phillips screwdriver, a flashlight, dry silicone spray, and a stiff nylon brush. Anything more involved (panel removal, mortise replacement, glass swap) realistically needs a two-person crew, suction handles, and the right replacement parts on hand.

Call us if: the door has to come out of the frame, the glass is cracked or foggy, the lock body is broken, the track lip is gouged, or you've tried the obvious fixes and they didn't work. Diagnosis is free; you only pay if you have us do the work.

If we're servicing your door, we always upgrade rollers to stainless (mild-steel originals rust in coastal salt air), re-cap the track if it shows any wear, and re-key the lock cylinder to match your house keys if you want it. Small upgrades, big difference in long-term reliability.