I have a 2011 8319SS Rockwood Signature Ultra Lite. Recently I opened the 2 slideouts. The temp. was about 5 Celcius and the trailer was not completely level. Anyway, when the large slideout opened, a crack formed above the top corner running to the slide topper rail. Is it possible to repair. I have no warranty and I know that replacing the entire sidewall is extremely expensive. Any help would be appreciated!