Decking takes the most direct abuse on a dock: sun, water, ice, foot traffic and gear. When boards go soft, crack or come loose, they become a tripping and safety hazard, and water getting into the frame through gaps can speed up other damage.
Decking options
- Treated wood. Lowest upfront cost; needs regular cleaning and sealing.
- Composite. Resists rot and splinters with lower maintenance; costs more.
- Aluminum. Very durable and lightweight; often used on premium docks.
While the deck is open
Replacing decking exposes the frame, which makes it a good time to check welds, crossmembers and flotation attachment points. Ask your contractor to look over the frame and flotation while the boards are up, so any hidden issues can be addressed at the same time.
Common questions
Which decking lasts longest on a dock?
Composite and aluminum decking generally need less maintenance and last longer than wood, but they cost more up front. Treated wood is the budget option and needs regular sealing.