I just noticed that the interlocking planks in my timbertech deck, at less than one year of age, are "cupping" and creaking. It was solid and smooth until recently. The deck was built in cool weather and seemed fine throughout our hot Summer. The weather has just turned cool in the past few weeks (mid-November). There is 13 feet of open air under the deck and the problem is present in all areas of the deck, sunny as well as shaded. I live on the gulf coast of North Florida. Does anyone out there have any suggestions how I should proceed? I plan to meet with the distributer's representative next week. Any predictions? Thanks for any helpful suggestions.