Gray, blotchy or splintering: how to tell when a fence or deck needs restaining

If water soaks in and the wood has gone gray, it is time

A wood fence or deck needs a power wash and restain when the color has faded to gray or gone dark and blotchy, when water soaks into the boards instead of beading on the surface, when mildew or green growth shows in shaded spots, or when a deck starts to feel rough and splintery underfoot. Those are signs the protective finish has worn away and the wood itself is now taking the sun and the water. If the boards are still firm and the posts are solid, a wash and restain can bring the wood back. If the wood is soft or the posts move, you need a repair first.

At Park Cities Fence & Deck we build new fences and decks, but a large part of our work is restoring ones that are structurally sound and simply weathered. This guide walks through what to look for, a few quick tests you can do yourself, how a proper wash and restain is done, and where restaining stops being the answer.

Why wood loses its finish so quickly here

Every exterior wood finish is fighting two things: ultraviolet light and moisture. Sun breaks down the surface fibers and the finish on top of them, and water carries away what the sun loosened. A fence or deck facing south or west takes the most sun, and any section hit by a sprinkler every morning takes the most water. That is why one side of a fence can look tired years before the other.

Cedar is naturally resistant to rot and insects, which is why Western Red Cedar is the most popular fence wood in Dallas, but it is not immune to weathering. The Western Red Cedar Lumber Association notes that as cedar weathers it loses its natural color and turns gray, and that outside very dry climates it tends to weather to a dark, blotchy gray rather than an even silver. That blotchy look is not dirt you can rinse off. It is the surface of the wood changing.

Five things to look for on a fence or deck

Walk the fence line and the deck on a dry day, in good light, and look for these. One or two of them on a single section is normal wear. Several of them across the whole fence or deck mean the finish has done its job and needs renewing.

• Color: the original stain has faded, or the wood has turned gray or dark and uneven
• Water behavior: a splash of water darkens and soaks into the board instead of beading up
• Growth: green or black mildew in shaded spots, along the bottom of the fence or between deck boards
• Surface: the boards feel rough or fuzzy, or a deck gives splinters to bare feet
• Film failure: on a solid or painted finish, peeling, flaking or patches where bare wood shows through

Two quick tests before you call anyone

The water test takes a minute. Sprinkle water on a few boards in different places: a sunny section, a shaded section and a deck board in a traffic path. If the water beads, the finish is still working there. If it darkens the wood and disappears, the finish is gone. Note which areas fail; it is common for only the sunny or sprinkler-soaked parts to fail first.

The firmness test matters more. Press a screwdriver into the bottom of a few pickets, into the base of each post at the soil line, and into the deck boards and framing where you can reach them. Firm wood resists. If the tip sinks in easily, the wood is soft, and a new coat of stain will not save it. Then push each post near the top. A post that rocks is loose in its footing or broken below ground. Mark anything soft or loose before you think about stain.

When a restain is the right call, and when it is not

A wash and restain is the right call when the structure is sound and the problem is the surface: gray, faded, mildewed or rough wood on firm boards and solid posts. Our repair page notes that a fence 10 to 20 years old with a sound structure can often be restored with professional staining. That is real value, because you keep a fence or deck that still has years left in it instead of paying to replace it.

It is the wrong call when the posts are loose or rotten, when many pickets or deck boards are soft, split or cupped, or when the rails are sagging. Staining over that is paying for appearance on a frame that will not last. In those cases the order is repair first, then wash and stain the surviving wood along with the new pieces so they weather together. If you found loose or soft posts in the tests above, my guide on whether a leaning fence needs repair or replacement is the place to start.

How a proper wash and restain is done

The wash is where most of the damage happens when this is done badly. As our power wash and restain page explains, wood should be washed at roughly 500 to 1,200 PSI, and pressure above 2,000 PSI gouges and tears the wood fibers. The wand should use a wide fan tip, never a zero-degree tip, held 12 to 24 inches from the surface, moving with the grain in slow strokes so it does not leave cut lines across the boards. A wood-safe cleaner is applied first and given time to work without drying on the surface.

Then the wood has to dry. The standard wait is one to two days, and the same page recommends a moisture content of 12 to 15 percent or less before staining. A simple check is to sprinkle water on the board: if it soaks in, the wood is ready to take stain, and if it beads, it is still too damp or something is still sitting on the surface. Stain applied to wet wood does not penetrate and fails early.

Finally, the stain. For an older fence, we generally prefer an oil-based penetrating stain that soaks into the wood. Solid or water-based stains have their place, especially on new construction or where earlier power washing left scars that need covering. The steps, in order:

• Repair loose posts, failed rails and broken boards first
• Protect plants, siding, the house and hardware from cleaner and overspray
• Apply wood-safe cleaner and let it work without drying
• Wash at low pressure with a fan tip, with the grain
• Let the wood dry until water soaks in rather than beading
• Apply stain evenly, working one section at a time to avoid lap marks

Which finish to choose, and how long it lasts

The finish you choose decides how soon you will be doing this again. The Western Red Cedar Lumber Association notes that clear, essentially colorless finishes typically last only one or two years depending on exposure, and that the pigments in tinted stains protect against UV better than the filters in transparent products. A semi-transparent stain shows the grain and gives more protection than a clear coat. A solid stain hides the grain and can cover old scarring, at the cost of the natural wood look.

On our own fences, the guidance we give is to seal or stain every two to three years and keep sprinklers off the wood. Sunny sides and sprinkler zones may need attention sooner. For new cedar, wait: it needs to cure for several weeks to a few months before the first coat, so we either return to stain it or add it later through our restain service. For a full maintenance calendar, see my guide on making a cedar fence last.

Decks need a closer look than fences

A deck takes everything a fence takes plus foot traffic, furniture, grills and standing water between boards. Check the boards in traffic paths and around planters and the grill, where the finish wears first. Look underneath where you can: the framing, the joists and the posts should be as firm as the boards on top. Raised deck boards, popped fasteners and soft spots are repair items before they are stain items.

A wood pergola belongs on the same checklist. Its beams and rafters take full sun on every surface, and the tops of horizontal members hold water after rain. Look along the top edges for gray, checked wood and at the base of each post where it meets the slab or the ground. The same rules apply: firm wood can be cleaned and refinished, soft wood needs repair first.

If your deck is composite rather than wood, you do not restain it. Composite is chosen precisely because it resists fading, staining and splintering. It still needs cleaning to keep mildew and grime off. If you are planning a new deck and weighing that choice, my guide to deck and pergola mistakes covers cedar against composite in more detail.

Doing it yourself versus hiring it out

Many homeowners stain their own fence, and on a short, sound fence that is a reasonable weekend project if you respect the pressure limits, let the wood dry properly and protect everything around it. Where it goes wrong is the wash. A rented pressure washer with the wrong tip can scar a fence in minutes, and those marks often need a solid stain to hide.

When you have us do it, I look at the fence or deck first, test the posts and boards, and tell you whether it is a restain job or a repair job. You receive a free written estimate, the crew repairs anything that needs it, washes, lets the wood dry and stains, and I walk the result with you. We do this for homeowners and commercial properties across Dallas-Fort Worth, and it is one of the most cost-effective ways to protect wood you already own.

Questions people ask me