Marvin Integrity Ultrex fiberglass
I am building a new house and have 14 Marvin Integrity Ultrex fiberglass to put in. They are all delivered and I am seeing warped frames in most. Today I discovered why. They shrink wrap the window for shipping and it pulls the frame. I checked a small one today,18X48 and the sides were pulled in over a 1/2" each side. Has anyone had this problem or did they forget to brace the inside for shipping?