How to Replace Deck Nails With Screws

Replacing nails with screws can extend the life of your deck.

Decks built with screws are stronger, last longer and require fewer repairs during their life span. Many of the same benefits can be attained by replacing nails in the decking with screws. Rather than replace a nail here and a nail there, replace them all at the same time to save yourself future repairs. If your deck is more than a year old, while you're at it, flip your boards over for a fresh new look.

Things You'll Need

• Pry bar
• Hammer
• Saw horses
• Carpenter's square
• Drill with screw bit
• 1 5/8 inch treated deck screws

Instructions

Removing the Nails

1. Start in one corner of the deck to pry the boards up. Use a long heavy-duty pry bar for easy removal. Drive the flat end of your pry bar under the edge of the deck board with a hammer, then pry the board loose, moving your pry bar along the board as needed. Leave the nails in the boards, to be removed in the next step.

2. Stack your deck boards on a pair of saw horses for easy nail removal. Flip each board nail points up and use a hammer to knock all of the nails back through at least half way.

3. Flip the board over to reveal the nail heads, which should be standing out from the board enough to get a claw hammer or nail bar beneath. Pry the nails out and drop them in a bucket to keep them out of the lawn.

Screwing the Boards Down

1. Replace boards as you go. Once the nails are removed, set the board back into its original position, with the top side down to take advantage of the less weathered look of the underside. Do two or three rows like this before screwing the boards down, to save time.

2. Space each row using a metal carpenter's square on edge between the deck boards, to allow for swelling and water runoff. Space between the ends of deck boards as well.

3. Drive 1 5/8 inch treated deck screws with a drill or impact driver and screw bit. Use at least two screws in each joist. Drive the screws flush with the decking. Avoid countersinking more than a little, to prevent puddling, which can corrode screws and rot decking.

4. Replace any damaged boards while you have them loose, and check your framing for signs of wear. Tighten loose joints and repair or replace any damaged framing. Use joist hangers to reinforce weak joints. Deck screws, replacement decking and joist hangers can all be purchased at hardware and home improvement stores.

References

• Hammer Zone: Building a Basic Deck
• Ron Hazelton: Deck Replacement