Retrofit windows

I had to work yesterday and finish sealing up the window wall .
Siding and everything is done on that area.
Customer was very happy.
I don't normally work weekends.
I do whatever has to be done , at times that means late nights and or weekends.
I think the company that did the windows might be in trouble ?
As far as I know warranty is 1 year by law.
Not sure about windows?
I think he said it was 3 years ago they were replaced.