Insurance claim denied

[David Lewis]

My insurance company denied my claim for a loss due to a water leak that did extensive damage to BRRRR property we just completed. The reason the adjuster cited the denial was because the property had been vacant 60 days and he couldn't pin point if the loss took place before or after the 60 mark. Needless to say, I'm pretty disappointed and not sure what I should do to fight this. Do I have any legal recourse? The property is in north Texas and we took all necessary precautions during the winter storm to turn off the water and drain the lines. It appears as though the main ball valve failed letting water back into the lines causing the loss. Any help is greatly appreciated.