We had a TimberTech deck installed about 2 years ago. After about 1 year the we noticed the deck boards had swelled and the gap between them was gone. About 6 months later the deck boards swelled so much that they popped the screws and raised up in places. We called TimberTech and were told to send them pictures of the deck. They said the boards were installed touching each other. We didn't have pictures of the deck when it was installed with a 3/16 to 1/4 inch gap between the boards.They will not replace the material. I do not recomend using TimberTech decking material.