How to Clean Cedar Shakes Safely and Effectively

Cedar shakes add natural warmth and rustic charm to homes, but maintaining their look requires the right approach. This guide outlines practical steps for cleaning cedar shakes, using consumer-friendly tools, and preserving the wood’s integrity over time. Readers will find a clear plan, safety notes, and common troubleshooting to keep cedar siding in top condition.

Quick Answer

To clean cedar shakes, start with a gentle brush and a cedar-safe cleaner. For stubborn stains, consider a soft spray or low-pressure wash with dedicated cedar detergent. Always test a small area first and work from bottom to top to prevent streaks.

What You’ll Need

cedar shake cleaning brush soft bristle
wood cleaner for cedar shakes concentrate
cedar shake cleaning spray bottle with wood detergent
low pressure garden sprayer for cedar shake cleaning
pressure washer detergent for cedar shakes

	Wash Safe™ CEDAR WASH \| Eco-Safe and Organic Wood Cleaner \| Clear, Bleach-Free Powder Concentrate \| Clean Cedar Shakes, Shingles, Clapboard, Decks, Beams and Wood Surfaces, 3LB.
	Hand Broom Cleaning Brushes-Soft Bristles Dusting Brush for Cleaning Car/Bed/Couch/Draft/Garden/Furniture/Clothes,Wooden Handle
	Kärcher Multi Purpose Pressure Washer Detergent, Removes Dirt and Grime from Fences, Siding, Patios, Driveways, Sidewalks, Concrete and More, Highly Concentrated, 1 Quart

Before You Start

Inspect the cedar shakes for loose fibers, damaged boards, and mold growth. Safer weather matters: choose a dry, overcast day to avoid rapid drying that can cause cracking. Wear eye protection and gloves, and protect surrounding landscaping from cleaners. Never use a high-pressure setting on cedar siding; it can gouge the wood. Plan the project for 1–4 hours depending on square footage and stain level.

Step-By-Step: How To Clean Cedar Shakes

Close nearby windows and doors. Protect the interior by laying drop cloths or plastic sheeting where splashes might occur.
Mix a cedar-safe cleaner according to the product instructions. Use a wood cleaner for cedar shakes concentrate for best results on surface dirt and mildew.
Test a small, inconspicuous area with your cleaner to ensure there’s no discoloration or damage.
Apply the cleaner with a cedar shake cleaning spray bottle with wood detergent or a low pressure garden sprayer for cedar shake cleaning, saturating the surface evenly.
Allow the cleaner to dwell for the recommended time. Avoid letting it dry completely to prevent streaking.
Gently scrub in a circular motion with the cedar shake cleaning brush soft bristle, focusing on moldy or stained spots.
Rinse from the top down with a low pressure garden sprayer or a pressure washer detergent for cedar shakes on a cool setting. Use the lowest effective pressure to avoid damage.
For tough stains, repeat the cleaning cycle on affected areas. Do not oversaturate or linger cleaners on wood for extended periods.
Allow the shakes to air dry completely before repainting, resealing, or re-staining. Inspect for any remaining stains that may require a spot-treatment.
Apply a cedar-safe sealant or water-repellant finish as needed after drying to protect against moisture and UV damage.
Document any recurring issues (mold, mildew, or staining) for future maintenance planning.

Troubleshooting

Symptom	Likely Cause	Fix	Prevention
Streaks after cleaning	Uneven rinse or cleaner residue	Rinse thoroughly from top to bottom; reapply cleaner only to affected areas	Keep a consistent cleaning pattern; use a light mist for rinsing
Wood feels rough or discolored	Mildew or dirt buildup	Spot-treat with cedar cleaner and gentle brushing	Regular maintenance every season
Bleached or faded spots	Overexposure to sun or harsh cleaners	Spot-test and avoid aggressive products	Use products labeled safe for cedar
Shakes show moisture after cleaning	Poor drying conditions	Improve airflow and dry time; postpone rainy days	Provide adequate ventilation and sun exposure
Stains reappear quickly	Moisture intrusion or mildew recurrence	Apply stain-resistant sealant after cleaning and drying	Address source moisture, gutters, and drainage

Common Mistakes

Using a high-pressure washer on cedar shakes — it can gouge or abrade wood.
Failing to test cleaners on a hidden area before full application.
Letting cleaners dry on wood before rinsing, which can leave residue.
Over-wetting the surface or leaving puddles that promote rot.
Skipping drying time before sealing or staining.

These missteps can lead to unsatisfactory results or damage. Planning and a gentle approach yield the best long-term outcomes.

Tips For Best Results

Choose a cleaner specifically labeled for cedar or for wood siding to avoid chemical reactions that discolor cedar.
Test any cleaning method on a small area to confirm color stability.
Work in shade and avoid direct, midday sun to prevent rapid drying and uneven results.
Rinse thoroughly and monitor water runoff to protect plants and landscaping.
Regular maintenance every 1–3 years helps prevent severe staining and buildup.

Call A Professional

Consider a pro if cedar shakes are severely moldy, cracked, or if exposure risks include delicate landscaping or historically valuable siding. Stop and seek help if you notice extensive rot, structural damage, or persistent moisture issues that cleaning cannot address.

FAQ

What’s the best cleaner for cedar shakes?

Look for a cedar-safe wood cleaner concentrate designed for cedar shakes to avoid bleaching or damaging the wood.

Can I use a pressure washer on cedar shakes?

Only with very low pressure and a wide nozzle; otherwise, avoid it to prevent surface damage.

How often should cedar shakes be cleaned?

A regular cleaning every 1–3 years helps maintain appearance and longevity, depending on climate and pollution exposure.

Do I need to seal cedar shakes after cleaning?

Sealing or applying a water-repellant finish after drying can help protect against moisture and UV damage.

Buying Guide

When selecting cleaning tools and products for cedar shakes, consider size, ease of use, and compatibility with cedar. Here are factors to evaluate:

<bCleaning tools: A soft-bristle brush, a spray bottle for detergents, and a low-pressure sprayer are essential for even coverage and safe cleaning.
<bDetergents and cleaners: Choose cedar-safe wood cleaners or concentrates formulated for cedar shakes to prevent color changes.
<bApplication method: A spray bottle with a compatible detergent and a garden sprayer offer flexible cleaning options without high pressure.
<bWater supply and rinse: A garden hose with adjustable nozzle or a low-pressure sprayer helps control flow and pressure.
<bSafety and maintenance: Personal protective equipment and a plan for drying time reduce risk while maintaining cedar integrity.

Assess your home’s needs, climate, and access to water when choosing products. If in doubt, consult a pro for an evaluation of your cedar siding and recommended maintenance schedule.