Is it normal for balcony glass to self explode, once last year, once this year?

The balcony glass exploded by itself, once last year, once this year, this must be abnormal, you have to find the reason, it may be the quality of the glass, or it may be that there is something on the balcony that caused the explosion, you have to rule out the potential safety hazards.

This is certainly not normal. It is dangerous for balcony glass to self-detonate. If your glass often blew itself up, you'll want to change to a better one next time. You can change to a double glazing glass or a stronger tempered glass.

If not, then the quality of your glass is not up to par, if it is, then it is recommended that you replace it with temperature-resistant glass.

This is certainly not normal. There must be something wrong with the quality of the glass.

It's definitely not normal. Is it that the balcony is deformed by force, which makes the window frame compressed, and the glass is also compressed at the same time, causing cracking.

It's really rare, but I don't think you should consider superstitious claims. It is still necessary to carefully check the cause to see if there is any external force, or if the weather is hot, which causes what point of refracted light makes the glass reach the burst point, etc.

If the balcony glass is tempered, it is normal for self-explosion to occur, because tempered glass allows a self-explosion rate of three thousandths, which may be a coincidence, so that you encounter it once a year.

This situation is very rare, first check if there is something squeezing, if not, go directly to the seller to solve it.