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How to Stain and Seal a Deck (and Make It Last)

A clean deck and the right finish make it last for years.
A clean deck and the right finish make it last for years.

A good stain job protects your deck for years; a rushed one peels by fall. The wood prep matters more than the stain you buy.

Wash it, then let it dry a full two days.
Wash it, then let it dry a full two days.

Clean it and let it dry

Sweep, then wash with a deck cleaner to strip dirt, mildew, and old flaking finish. Rinse and let the boards dry a full day or two — stain will not bond to damp wood.

Deck cleaner →

Match the finish to how much wood grain you want to show.
Match the finish to how much wood grain you want to show.

Pick the right finish

Semi-transparent stain shows the grain and is easiest to refresh; solid stain hides worn wood but can peel. Either way, choose one with a built-in sealer so water beads instead of soaking in.

Deck stain & sealer →

Thin coats, with the grain, and never let it puddle.
Thin coats, with the grain, and never let it puddle.

Apply thin, with the grain

Work in the shade, a few boards at a time, brushing or padding two thin coats along the grain. Thin coats soak in and last; thick coats sit on top and peel.

Stain applicator pad →

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Stain on a dry, mild day out of direct sun.
Stain on a dry, mild day out of direct sun.

Time it right

Aim for a dry stretch, 50–85°F, with no rain for 24–48 hours after. Spring and early summer are ideal.

Staining or rebuilding a deck?

Figure the boards, screws, and stain you need with the free Deck Calculator.

Deck calculator

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