How to Restain a Deck: A Step-by-Step Guide for Lasting Results

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A well-maintained deck adds beauty and value to your home, but pressure-treated wood—the most common decking material—requires regular staining and sealing to withstand sun and rain. Whether you're refreshing a new deck or restoring a weathered one, here's how to do it right.

Preparing a New Deck

New pressure-treated lumber is saturated with preservatives and feels damp. Wait several days after construction before staining, but don't leave it unprotected for more than a few weeks—UV rays degrade wood quickly.

Restoring an Old Deck

1. Repair & Replace Damaged Boards

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Inspect every board. Replace cracked, warped, or rotted ones. Deck screws often seize and snap after years in treated wood; I now use 2-inch ring-shank nails—they hold tight and don't break during removal. Sanding the surface removes old stain layers and opens the wood grain for better penetration.

2. Deep Clean the Wood

Credit: mjpyro

Commercial deck cleaners work, but a homemade solution is just as effective and far cheaper:

DIY Deck Cleaner: Mix 1 part bleach to 5 parts water, add a scoop of laundry detergent. Wet the deck, apply with a mop or pump sprayer (use a sponge for railings), let sit 10 minutes (don't let it dry), then scrub with a stiff-bristle brush. Rinse thoroughly. Avoid pressure washers—they can gouge wood.

Let dry 1–2 days. If the wood is still gray or faded, apply a commercial brightener before staining—especially for transparent or semi-transparent finishes. Skip it if using a solid or "rescue" stain.

Choosing the Right Stain

• Toner – Light color, shows grain, modest UV protection.
• Transparent – Natural look, poor UV resistance.
• Semi-transparent – Best balance: good UV protection, resists peeling.
• Solid – Maximum UV protection, but can peel if over-applied.

Oil-based stains penetrate deeper; water-based have lower VOCs. For badly cracked boards, thick "deck rescue" products (4–10x regular stain) can work, but many users report peeling within months. Always strip old solid stain before switching to a lighter or more transparent finish.

Applying the Stain

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Follow the manufacturer's instructions. I prefer a ½-inch nap roller—it's faster and more even than deck pads. For gaps between boards, use a brush.

Pro tip from This Old House: Mix ½ pint exterior-grade varnish per gallon of stain for extra durability.

Coverage: Older wood drinks stain. A 10×20 ft deck typically needs 3–4 gallons for two coats. Buy 3-gallon buckets for a discount.

Maintenance Reality Check

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Manufacturers claim 5–10 years; real-world performance is 3–4 years. Plan to restain every 3–4 years—budget $100–$150 per cycle plus board replacements. The most tedious parts? Railings and between-board gaps. But a weekend of work buys years of protection.

Long-term, composite decking (hidden clips, no staining) pays for itself in 10–20 years. But for wood decks, consistent care is the price of longevity.