Refinishing / Repairing Deck: Screws vs. Nails?
Mom: That looks rather nasty in places. Repair or replace is a tough call when one is not right there, but it sure looks like a good sanding is in order at the minimum. If the boards are SOLID, like you are not afraid to lean on them hard in the middle of their supports, then they are probably fine. Probably. As for nails vs screws, I would never use a nail on a deck, myself. There is a lot of movement in the boards, and nails are much more likely to loosen. If you sand it and the nails are solid, then leave them. As they pop up (if they do), pull them and replace them w/ an appropriately sized screw, or drill and install a screw next to the nail hole. If you replace any boards, I'd suggest screwing them down. If the wood is All Weather, then galvanized or stainless steel (or maybe plastic coated) screws are in order. Good luck!