Wood Fence Cleaning in Houston: What to Know Before You Stain or Seal

By the Peak Clean team · October 13, 2026

A wood fence can go from fresh to weathered quickly in Houston's heat and humidity. Before you decide to replace or restain it, a careful cleaning can make a bigger difference than you'd expect.

Why fences turn gray and green

Sun fades wood to gray, while moisture and shade feed algae and mildew, which show up as green, black, or dark streaks. The side of the fence that stays damp, usually the shaded or north-facing side, tends to go first.

Why too much pressure is a problem

Wood is softer than concrete. High pressure can gouge the surface, leave fuzzy or splintered fibers, and drive water deep into the boards. A lower-pressure wash with a cleaning solution lifts the growth without tearing up the wood.

Cleaning before you stain or seal

• Stain and sealer need a clean surface to bond properly
• Wood should dry fully before it's coated. That often takes a few days depending on the weather
• Always follow the stain or sealer manufacturer's directions for prep and drying
• Cleaning first usually gives a more even color than staining over mildew

What cleaning can and can't do

Cleaning removes algae, mildew, and surface dirt, and it usually brightens the wood noticeably. It can't repair rotted, cracked, or warped boards, and sun-faded gray may only lighten rather than disappear. Staining and sealing are separate steps.

Keeping a fence cleaner longer

• Trim shrubs and vines that press against the boards
• Point sprinklers away from the fence
• Clean about once a year, or more in shady, damp spots

Frequently Asked Questions

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