Deck & fence washing — done right for wood

Pressure that respects the wood

Decks are where I see the most damage from inexperienced washers. Too much pressure, the wrong tip, or the wrong angle and you're left with feathered, fuzzy boards that soak up stain unevenly and look worse than they did before the wash.

My approach: wide fan tip, 12+ inches off the boards, even overlapping passes that go with the grain — never across it. If you see the wood fibers standing up after washing, the person washing went too hard. That's a light sanding job to fix.

For composite (Trex, TimberTech, and similar), I use even less pressure and a cleaner rated for cap-stock. Composite doesn't fuzz, but the top layer can dull if you scrub it too aggressively.

What's included on a deck wash

• Full deck surface — floor boards, edges, and skirt
• Rails, spindles, and top caps
• Stairs and landing pads
• Under-deck rinse if accessible
• Post-wash sweep for any raised debris
• Optional deck brightener rinse ($25) — neutralizes pH, opens grain for stain absorption

Fences — wood, chain link, or vinyl

Wood privacy fences pick up green algae on the north-facing side within a year or two. I soft-wash with a wider fan tip so I lift the algae without gouging the boards. Chain link cleans up fast with a targeted pressure pass. Vinyl fencing gets the same soft-wash treatment as vinyl siding — low pressure plus a cleaner does the work.

Old cedar fences that haven't been sealed in years may show gray weathering that won't fully come out of the wood without a brightener step. I'll show you a test spot before I commit to the whole run so you can decide what result you want to pay for.

Prepping a deck for stain or sealer

If you're planning to stain or seal after the wash — mention it when you book. The pre-stain wash is a slightly different job:

• Wider fan tip and more distance — no raised grain to sand out later
• Deck brightener rinse — restores pH so stain penetrates evenly
• Extra-thorough rinse of runoff — no cleaner residue left to interfere with the coating
• Honest read on the wood — if a board's rotting, I'll tell you before it costs you a stain job

Then wait — the step people skip

This is the #1 mistake with DIY deck refinishing: staining wet wood. The deck feels dry on the surface a few hours after washing, but the wood is still holding moisture down inside.

Rule of thumb: 48 hours of dry weather minimum. In Middle Tennessee humidity, 72 hours is safer. Splash a little water on the deck before you stain — if it beads up, wait longer; if it soaks in, you're ready. Skip this and the stain gets trapped between water and wood, which is exactly what peels off in six months.

Local reality: decks in Manchester and Tullahoma

Most decks I clean around here are 8–15 years old, pressure-treated pine or cedar, and have picked up a lot of gray weathering on the top boards. Composite decks are more common in newer subdivisions (2018+). The humidity here is aggressive — a deck that hasn't been washed in 3+ years will have visible green algae on the shaded side, and the rails almost always get worse than the floor.

I book most deck jobs in March through May (before summer heat makes staining miserable) and again in September–October (after summer growth, before winter freeze). That's the schedule I recommend for anyone in Coffee, Bedford, or Franklin County.

When a deck wash is (and isn't) the right call

A deck wash restores the look and preps for a coating. It doesn't fix structural issues, and there are a few situations where it's the wrong first step.

• Right call: annual cleaning, pre-stain prep, algae or moss on the shaded side, gray weathering, general grime.
• Right call before you stain or seal: the wash + brightener rinse combo is what makes stain absorb evenly.
• Not yet: boards that need replacing — replace first, wash second, so the new boards weather in evenly before stain.
• Managed expectation: deep gray weathering may not fully brighten without a stronger chemical strip step I don't offer.
• Not my service: full stain stripping, board replacement, and rail rebuilds — I'll refer you to a good local refinisher.

Keeping a deck cleaner (and lasting longer) between washes

A stained deck that's washed on schedule can last 20+ years. A neglected deck starts checking, cupping, and splintering in half that time.

• Sweep off leaves and pine needles regularly — sitting debris traps moisture and grows algae.
• Keep planters on feet or trays so they don't hold water against the boards.
• Reapply a penetrating stain or sealer every 2–3 years; solid stain lasts a bit longer but shows wear at the edges first.
• Wash before winter, not after — going into freeze-thaw season with clean, sealed boards prevents the worst of the damage.