How to Clean Cedar Shakes Safely and Effectively
Cedar shakes add natural charm and texture to homes, but exposure to weather, mildew, and algae can dull their appearance. Regular cleaning helps preserve the wood and extend the life of the siding. This guide provides practical steps, safety tips, and product recommendations to clean cedar shakes without damaging the wood.
Quick Answer
For a thorough clean, mix a cedar shake cleaner mildew remover for exterior wood siding with water, apply with a soft brush or low-pressure sprayer, scrub gently, and rinse well. For stubborn stains, follow with a wood cleaner for cedar shakes brightener to restore color, then rinse again. If using a pressure washer, choose a dilute concentrate labeled safe for cedar shakes and keep the nozzle at a safe distance.
What You’ll Need
- cedar shake cleaner mildew remover for exterior wood siding 1 gallon
- wood cleaner for cedar shakes brightener restore cedar siding 1 quart
- pressure washer safe cedar shake cleaner concentrate exterior wood
- soft-bristle brush or long-handled deck brush
- garden hose or low-pressure sprayer
- protective gloves, eye protection, and a washable work clothes
Before You Start
Assess the siding for damage such as loose or split shakes, rot, or insect damage. Repair or replace damaged sections before cleaning. Wear protective gear and test a small area first to confirm there’s no color fading. Perform cleaning on a dry, overcast day to prevent rapid drying that could leave streaks. Do not use bleach on unfinished cedar or softwoods that could bleach wood unevenly. If you’re using a pressure washer, keep the nozzle on a wide spray pattern and stay at least 12–18 inches from the surface to avoid gouging the wood.
Plan the work area by protecting nearby plants and landscaping. Cover nearby windows and doors to prevent water intrusion. Allow adequate drying time before repainting or resealing.
Step-By-Step: How To Clean Cedar Shakes
- Prepare the area and mix the cleaner according to the product label. Use a ratio that matches the concentration recommendations for cedar shakes.
- Apply the cedar shake cleaner mildew remover for exterior wood siding to the siding using a sprayer or brush, focusing on stained areas. Let it sit for 5–10 minutes to loosen mildew and grime.
- Gently scrub with a soft-bristle brush, working from the bottom up to avoid streaking. Do not scrub vigorously to prevent damaging the wood fibers.
- Rinse the treated area with a garden hose or low-pressure nozzle, ensuring all soap and residue are removed. Avoid high-pressure streams that can gouge the wood.
- If stains persist, apply the wood cleaner for cedar shakes brightener restore cedar siding 1 quart. Let it sit according to the label, then scrub lightly and rinse thoroughly.
- For large surfaces or stubborn grime, you may use the pressure washer safe cedar shake cleaner concentrate exterior wood at a low setting. Keep the spray moving and hold at a safe distance to minimize surface impact.
- Once the cedar shakes are clean and dry, inspect for any remaining discoloration. Re-treat isolated spots with the appropriate cleaner and rinse again.
- Allow the siding to air-dry completely. If desired, apply a weather-protective treatment or sealant once the wood is dry to enhance longevity.
- Clean extending areas such as eaves, trims, and corners with the same approach to ensure a uniform appearance.
- Dispose of used water away from foundations and collect any runoff in approved drainage areas to prevent environmental impact.
- Record any observations about the cedar shakes, including areas that may need repair or resealing in the future.
Troubleshooting
| Symptom | Likely Cause | Fix | Prevention |
|---|---|---|---|
| Streaking after rinse | Uneven application or insufficient rinsing | Reapply cleaner evenly and rinse thoroughly | Test small area first; follow label timing |
| Bleaching or lightening color | Improper use of brightener on bare cedar | Use brightener only as directed and dilute correctly | Test area and avoid over-application |
| Wood fibers raised or fuzzy | Over-scrubbing or high pressure | Switch to softer brushing and lower pressure | Gentle brushing and gradual cleaning |
| Persistent mildew after cleaning | Deep-set mildew or moisture retention | Repeat treatment and check drainage | Improve ventilation and dry thoroughly |
Common Mistakes
- Using harsh chemicals not labeled for cedar or outdoor wood
- Using strong power washers too close to the surface
- Skipping test patches before full-area application
- Rushing the process with insufficient dwell or rinse time
- Avoiding drying time before sealing or staining
Tips For Best Results
- Test a small, inconspicuous area first to confirm color safety and effectiveness.
- Work in shaded areas to prevent premature drying, which can leave streaks.
- Use the lowest effective water pressure when cleaning with a washer to protect wood fibers.
- Follow up with a protective sealer or stain to extend cleanliness and color.
Call A Professional
Seek professional help if cedar shakes are severely weathered, rotted, or moldy beyond surface cleaning. Stop cleaning immediately if you notice cracking, splintering, or soft wood, which may indicate structural damage. Professionals can provide repairs, restoration, and proper sealing to protect the siding.
FAQ
Can I clean cedar shakes without a pressure washer?
Yes. A spray bottle or low-pressure sprayer with mild cleaner and soft brushing is effective for more delicate surfaces.
Is it safe to use bleach on cedar shakes?
Bleach can cause uneven color and damage; use products labeled for exterior cedar wood and follow the manufacturer’s directions.
How often should cedar shakes be cleaned?
Most homes benefit from cleaning every 1–3 years, depending on climate, shade, and mildew buildup.
Do I need to seal cedar shakes after cleaning?
Sealing or staining after cleaning helps protect the wood from moisture and UV damage, especially in harsher climates.
What if mold keeps returning?
Persistent mold may indicate moisture issues or poor airflow; address drainage, ventilation, and repair any leaks before re-cleaning.
Buying Guide
When selecting cedar shake cleaning products, consider size, application method, and compatibility with cedar wood. Look for mildewcide or wood-safe formulas designed for exterior cedar siding to minimize color loss. Consider products that offer both cleaner and brightener actions for restoration, as a two-step process can restore natural tone without harsh scrubbing. If choosing a concentrate for a pressure washer, verify the product specifies safe use on cedar shakes and follow dilution instructions precisely.
Key Buying Factors
- Size and coverage: Choose a bottle that matches your project scope; larger homes may require a gallon or more.
- Water compatibility: Ensure the cleaner is designed for exterior wood and safe for cedar.
- Application method: Sprayer and brush compatibility help tailor to your siding layout.
- Restoration capabilities: Some products include brighteners to restore color after cleaning.
- Safety and environmental impact: Look for biodegradable formulas and guidance for runoff.
- Storage and handling: Keep products sealed and out of reach of children and pets.
Want a cleaner aesthetic for your cedar shakes? With the right products and care, you can restore their natural beauty while protecting the wood for years to come. Ready to start, or need help choosing the best combination of cleaners? A quick inspection and test patch can set you on the right track.
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