Get out the broom: Fallen leaves will get wet and start to pile up. Be sure to keep a broom handy and sweep your deck regularly.
Remove the muck: Clean out the spaces between the boards on the deck so air can flow and water can run away.
Clean up the birdy-doo: Clean food stains and bird droppings as soon as you notice them.
Lift up the plants: If you have plants on the deck, put pot feet under them to allow air to flow. Or just relocate them now and then.
Protect the wood: Use a wood preservative as often as needed. Depending on the preservative you buy, it may need to be done every year, or every 2 or 3 years.
Set a date to inspect your deck: Maybe this is something you do every spring or every fall, but it should be done regularly. Look for signs of rot. If you see an area that seems a bit soft, poke it gently with a something sharp, like a knife. If it’s a bit spongy, replace it right away. Check for tiny holes in the wood, which might be a sign of insect infestation. Check the ends of any decking posts for rot or splitting. Check the bylaws in your area to make sure your stairs and railings are in compliance. Lean against the railing to see if it still feels sturdy or if it’s become a bit wobbly. Look for boards that are discoloured. They may just need cleaning, but if they’re badly weathered, they may need to be replaced.