How to Clean Redwood Deck

Redwood decks offer natural beauty and durability, but maintaining their look requires proper cleaning techniques and the right products. This article provides a practical, step-by-step method to restore color and remove built-up grime from redwood surfaces while preserving the wood fibers for long-term protection.

Quick Answer

For a thorough refresh, mix a wood-safe deck cleaner concentrate with warm water, scrub with a stiff nylon deck brush, rinse completely, then apply a deck brightener for redwood to restore color and even tone. Allow to dry fully before staining or sealing.

What You’ll Need

Redwood deck cleaner concentrate wood deck cleaner
Stiff nylon deck brush for wood cleaning
Deck brightener for redwood
Garden hose with a spray nozzle
Optional: protective gloves and eyewear
Optional: a breathable deck sealer or stain for after-treatment

	DEFY 2 LB Wood Deck Cleaner Powdered Concentrate – For Decks, Fences, Siding, & More – Covers Up to 1,000 Sq. Ft.
	#1 Deck Wood Brightener – 1 Gallon – Makes 5 Gallons of Wood Deck Brightening Solution
	KONEX Nylon Fiber Economy Utility Cleaning Hand Brush \| Heavy Duty Hand-Held Scrub Brush Stiff Bristles \| Wooden Body, Ideal Scrub Brushes for Cleaning (Peanut Shaped)

Before You Start

Prepare the area by removing furniture, planters, and any loose debris. Wet nearby plants and grass to protect them from cleaner runoff. Test a small, inconspicuous area first to confirm that the cleaner and brightener do not alter the wood unusually. Schedule cleaning on a dry day with mild temperatures; avoid direct sun or freezing conditions. Wear protective gear and follow manufacturer instructions on all products.

Step-By-Step: How To Clean Redwood Deck

Clear the deck of all items and sweep away loose dirt, leaves, and debris.
Rinse the surface with a light mist from the garden hose to dampen the wood before applying cleaner.
Prepare the redwood deck cleaner concentrate according to the product label, using warm water to improve cleaning power.
Apply the cleaner evenly across the deck, working in manageable sections to prevent drying before scrubbing.
Scrub each section with a stiff nylon deck brush for wood cleaning, using a circular or back-and-forth motion to lift dirt from the grain.
For stubborn stains, reapply cleaner to the area and allow it to sit briefly before scrubbing again.
Rinse thoroughly with a high-pressure spray or strong stream from the garden hose, ensuring all cleaner residue is removed.
Apply the deck brightener for redwood to restore natural color and even out tone; follow the product’s application guidelines.
Rinse the brightener completely and let the deck dry completely, typically 24 to 48 hours depending on conditions.
Inspect for any remaining gray or uneven areas; repeat steps if necessary, then consider sealing or staining to protect the wood.
Reposition furniture and decor once the deck is fully dry and any protective finish has cured.

Troubleshooting

Symptom	Likely Cause	Fix	Prevention
Water beads or runs unevenly after cleaning	Uneven cleaner application or insufficient rinse	Rinse again thoroughly; reapply brightener if needed	Follow uniform application guidelines
Wood looks gray or dull after cleaning	Low cleaning power or residue buildup	Repeat cleaner application and scrub with brush	Use the recommended deck cleaner and scrub thoroughly
Streaks or color unevenness	Uneven drying or improper use of brightener	Reapply brightener to affected areas and rinse well	Work in shade and allow complete drying
Deck beams and planks feel rough after cleaning	Remaining grime or weathering	Consider a second pass with cleaner and brush	Regular cleaning schedule to prevent buildup

Common Mistakes

Using a wire brush or harsh cleaners that can gouge redwood fibers
Rinsing too little, which leaves cleaner residues that dull color
Cleaning in direct sun or on hot surfaces, causing faster drying and streaking
Skipping a test area, risking color changes on the wood

Tips For Best Results

Work in shade and cool morning hours to reduce drying speed and improve cleaner effectiveness.
Always follow product labels for dilution ratios and contact times.
Use a dedicated stiff nylon deck brush for wood cleaning to avoid damaging the wood.
Rinse from one end to the other to prevent puddling and missed spots.
Plan for drying time before applying any sealant or stain; moisture can affect finish adhesion.

Call A Professional

Seek professional help if the deck shows deep rot, loose boards, or significant mildew growth that does not respond to cleaning. If a previous finish is peeling, a pro can evaluate whether stripping, sealing, or re-assembly is required. For structural concerns or uncertain measurements, contact a licensed contractor.

FAQ

Can I use a pressure washer to clean a redwood deck?

Light to moderate pressure can be effective, but use low pressure and keep the nozzle at a safe distance to avoid damaging the wood fibers.

How often should a redwood deck be cleaned?

Typically once per year, or more often in high-traffic areas or with frequent staining.

Is deck brightener necessary after cleaning?

Not always, but it helps restore color and even tone after cleaning, especially on weathered redwood.

When can I apply a sealer after cleaning?

Wait until the deck is completely dry; this can take 24–48 hours depending on conditions.

Can I use any deck cleaner on redwood?

Use a cleaner formulated for wood decks and specifically labeled safe for redwood to protect fibers.

Buying Guide

Choosing the right products and plan for a redwood deck depends on several factors. Consider the deck’s age, weather exposure, and whether it has a prior finish. Look for a deck cleaner concentrate wood deck cleaner that is safe for natural wood and contains biodegradable ingredients where possible. A deck brightener for redwood should be compatible with the cleaner and designed to restore color without harsh chemicals. Pair these with a stiff nylon deck brush for wood cleaning to lift dirt effectively without scratching.

Key buying factors include size and coverage, ease of use, and the time required for application and drying. Noise and energy use come into play mainly for power washers or spray tools, so opt for manual scrubbing if quiet operation is essential. For those planning ongoing maintenance, choose a product line that offers a compatible sealing or staining system to extend the deck’s life. Finally, assess the deck’s placement and exposure—shaded decks may require different timing and products than sun-exposed surfaces.