Some people opt to remove deck tiles to store undercover or indoors over the winter and off season in an effort to extend the life and look of their tiles but many others chose leave them out all year round. It completely depends on your preference, and the intensity of any outdoor weather conditions. But, because deck tiles are easy to install and remove and install again, it's convenient to take them inside during the winter if you decide to go that route.
Regarding the water: When installed correctly, rainwater will drain, unimpeded, off the deck tile surface and, with proper post installation attention, under the deck tiles and off the structural sub surface. Just make sure to periodically check that dirt and debris don’t accumulate under the tiles and affect the drainage patterns. Standing or pooling water that persists for more than 12 hours after a rainfall indicate that existing drainage may be less than ideal and should be addressed prior to deck tile installation.
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