I'm a contractor and have purchased and installed ...

I'm a contractor and have purchased and installed hundreds possibly thousands, of PGT windows. Unfortunately some have resulted in stress cracks, which are only covered after 12mo. The company claims these cracks after 12mo. are not due to manufacturers defects. The glass panel that usually cracks is the internal one that is laminated. It is the difference in expansion and contraction rates between the glass and laminate core that "stress" the glass. How can this NOT be a manufacturers defect?

I have since switched to CWS, better quality control, and a fully transferable warranty.

PGT used to be a better company but as of 2017-2018 they have lost my business.