I have a large desk with a tempered glass top, and after a move I’ve found that the glass top is warping a bit… it looks like a bow, but the bottom of the warp is against the table surfaces with the edges lifting (so it’s not weight).
I’ve never encountered tempered glass doing this, so figured best consult the pool of knowledge here.
-Jim
That is crazy, never seen it happen to me. Here is an article claiming that glass doesn’t really change over time and imperfections are usually from production and thus have always been there. IDK interesting though. If the glass has a coating or laminate, that may have shrunk over time and be pulling on the glass???
Yeah, but evidently stresses left from the process can take years to show themselves. I recently read a story on one of my FB glass forums about a blown-glass paperweight that is falling apart after years. (I forget how many – 10 years or more, though.) Glass remembers all those stresses unless it’s properly annealed.
By definition, tempered glass isn’t annealed. They just try to balance and maximize the stresses in the faces, both making it more difficult to brake from a face on impact, and ensuring it goes to tiny bits suddenly when it does break.
There are four different orientations a rectangular piece of glass can be placed on a desktop. Perhaps it got rotated, flipped, or both relative to the original position and what you’re seeing is a flex in the desk rather than in the glass.
They make small silicone disks you can put between the glass and the desktop. These will help with moisture and since they squish they will accommodate some a small fluctuations in flatness.
I’ll go through the rotations again, as I may have accidentally missed one.
The desk already has those silicone disks.