North Star stands behind all of its windows and doors with a generous limited lifetime warranty. The benefits of the North Star warranty are also transferable to a subsequent owner.
Every window has sticker as shown with a serial number on it inside of the frame. All that is required to register your warranty is the first six (6) or seven (7) digits of the serial number. This will register your entire window order.
We are in transition with changing from 6 digit numbers to 7 digit numbers.
For a warranty claim use the entire amount of digits to reference the individual window. The entire number is what your North Star dealer will require to complete the warranty service.