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Aluminum

Description Metal planks, often interlocking.

Options Aluminum boards are generally textured with ridges or covered in a heavy-duty plastic layer, which reduces the clanking sound when you walk. Opt for a product with a powder coating for extra durability and scratch resistance.

Pros Strong, rust-proof, and watertight, aluminum decking lasts for decades. Installed on a slight incline, it'll channel water away from the substructure, allowing for waterproof storage underneath.

Cons Metal is pricey, and textured surfaces trap dirt.

Care Sweep and hose regularly. Once a year, use a solution of dishwashing liquid diluted in water, and scrub the deck with a soft-bristle broom.

Cost $7 per square foot

Shown Above Powder-coated aluminum in Light Gray and Almond. $7.50/square foot. LockDry, lockdry.com.