Stair Stringers & Treads

ProWood® stair stringers and step treads provide the structural reliability and finished appearance required for safe, durable outdoor stairs. Pressure treated for ground-contact and exterior exposure, these components are built to resist rot, decay, insects, and harsh weather conditions in residential and commercial applications.

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Wooden deck stairs with railing and outdoor chairs, sand and hillside in the background.

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Features & Benefits

Discover the features and benefits of ProWood products

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Pressure-Treated

From light duty to critical structure treatment levels, ProWood lumber is pressure-treated to achieve the protection against rot, decay and insects you need for your build.

Hand holding a PROWOOD ground contact label while stapling it onto stacked wooden logs.

Color-Treated Options

Enjoy the beauty of a stained deck, fence, or other structure - without the annual upkeep. ProWood offers color-treated lumber options that have the protection you need and the colors you want without needing to stain.

Wooden deck stairs with black aluminum balusters surrounded by green plants and flowers in a garden.

Consistent Quality

ProWood products are consistently manufactured for quality, straightness, and uniform sizing to reduce headaches and support an easy and clean installation.

Yellow level tool on wooden deck joists under construction by a lakeside with trees in background.

Stair Stringers & Treads

Knowledge for Every Project

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Deck Boards

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A stack of redwood toned TrueFrame Joists.