'If you're talking about putting in a new deck, I'd recommend a less slippy wood choice such as cedar or redwood,' says Jon Christensen, CEO of renovation company BidMii. 'These are way less likely to become slippery when wet when compared to other woods.'
You could also install a low-maintenance composite deck that typically comes with some type of ridged surface. When walking on grooved composite decking, your feet will have a firmer hold to prevent slips.