How do you keep your deck from pooling water? - resolved | Ask ...The wood on my deck is too tight, so water isn't draining. This = icy danger ... It's one thing if the gaps between decking boards are getting packed with snow, but if there are no gaps between the boards then the deck was built incorrectly in the first place. posted by ... Depending on the boards and layout you could set a skil saw for a smidge less than the thickness of the boards and then use a straight edge to rip a groove between the each set of boards. You want to be ...