Cleaning a deck with a pressure washer is more than just using a high-powered tool. To make sure your deck lasts longer and looks great, you need to know how to use the right techniques and tools for pressure washing.
Using the right steps, such as maintaining a perfect nozzle distance and using sweeping motions, can greatly impact the effectiveness of the cleaning process.
Also, it’s important to know how to take care of your deck after washing them, from checking for damage to applying safe treatments.
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But what specific steps can make your deck look as good as new, all the while preventing long-term damage? The answer is below.
Preparing the Pressure Washer
- Read the Manual: Start by reading the manufacturer’s manual for safety instructions and operational guidelines.
- Check Oil and Gas: Make sure the oil level is correct and use fresh gasoline to avoid engine issues.
- Connect Hoses: Securely attach the high-pressure hose to the machine and the spray gun.
- Water Supply: Turn on the tap fully to ensure adequate water supply and release trapped pressure by squeezing the spray gun trigger.
Essential Pressure Washing Equipment
- Pressure Washer: A reliable machine with adjustable pressure settings.
- Nozzles: A 25-degree nozzle is recommended for deck surfaces.
- Garden Hose: Ensure an adequate water supply by connecting a garden hose to the pressure washer.
- Safety Gear: Wear earmuffs and goggles to protect from high-pressure water and debris.
- Deck Scrub Brush: Useful for pre-wash scrubbing of stubborn stains.
Also Read:
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Deck Cleaning Techniques
- Adjust Pressure Settings: Set the pressure washer to a medium level (1500-2000 PSI) to protect wood surfaces.
- Maintain Distance: Keep the nozzle at least 12 inches away from the deck to avoid damaging the wood.
- Use the Right Nozzle: A 25-degree nozzle tip provides a balanced spray pattern.
- Consistent Motion: Move the washer in a consistent, sweeping motion, slightly overlapping each pass.
- Wear PPE: Always wear gloves and safety goggles to protect yourself from debris and high-pressure water.
Post-Wash Care
- Inspect the Deck: Look for any damage such as splintering, warping, or loose boards and address these issues promptly.
- Apply Stain or Sealant: If the deck appears dull, apply a protective stain or sealant after the wood has dried completely (24-48 hours).
- Regular Cleaning: Sweep and clean the deck regularly to prevent debris buildup and mold growth.
- Maintenance Schedule: Establish a schedule to keep the deck in top condition.
Post-Cleaning Maintenance
- Rinse Debris: Use a 25 or 15-degree tip to rinse off any remaining debris.
- Drying Time: Allow the deck to dry for 24-48 hours before applying paint or stain.
- Avoid Surface Cleaners for Paint Stripping: This prevents damage to the deck.
- Clean Equipment: Thoroughly clean the surface cleaner and other attachments after use.
- Regular Maintenance: Check oil levels and clean nozzles to ensure top performance and safety.
Mastering Pressure Washing Techniques
- Consistent Distance: Maintain a distance of 12-18 inches between the nozzle and the deck.
- Sweeping Motion: Use a sweeping motion to prevent gouging or splintering the wood.
- Start Low, Increase as Needed: Begin with a lower pressure setting and increase gradually if necessary.
- Safety Guidelines: Always follow safety guidelines to protect yourself and the deck.
How to Pressure Wash a Deck Before Staining
Step 1: Gather Necessary Equipment Before starting, make sure you have the following items:
- Pressure washer (electric or petrol)
- Pressure washer nozzles (40-degree nozzle recommended)
- Garden hose
- Deck brightener
- Deck scrub brush
- Safety gear (gumboots, earmuffs, safety goggles)
- Bucket for brightener
- Rags
Step 2: Choose the Right Pressure Washer Electric pressure washers, like the Karcher k2, are suitable for light cleaning and are less likely to damage the deck. For faster cleaning, a petrol pressure washer, such as the Raptor RGPW3000, provides higher pressure but requires careful handling to avoid damage. Ensure you use the correct nozzle, with a 40-degree nozzle being ideal for cleaning.
Step 3: Prepare the Deck Remove all furniture and sweep away debris to avoid flying objects during pressure washing. This will also make the cleaning process smoother and safer.
Step 4: Apply Deck Brightener Mix the deck brightener according to the instructions and apply it to a wet deck. Scrub the deck with a brush and let the brightener sit for about 20 minutes. Keep the deck moist during this time by spraying a light mist of water if needed.
Step 5: Pressure Wash the Deck Start pressure washing the deck using a 40-degree nozzle. Hold the nozzle about 30 cm from the deck surface and move it along the length of the boards, raising it slightly at the end of each stroke to avoid lap marks.
Do not leave the pressure washer running for more than three minutes without pulling the trigger, and always ensure water is flowing to avoid damaging the engine.
Step 6: Allow the Deck to Dry Let the deck dry completely for 24 to 48 hours before staining. Staining a wet deck can result in a blotchy appearance and poor absorption of the stain.
Step 7: Light Sanding (if needed) If the deck has been stripped back, lightly sand it with an orbital sander and 80-grit sandpaper to remove any raised fibers caused by pressure washing. Skip this step if the deck is already stained.
Step 8: Time for Staining Once the deck is dry and smooth, it’s ready for staining. Choose a suitable stain and apply it following the manufacturer’s instructions for the best results.
Following these steps will ensure your deck is clean and properly prepared for staining, leading to a beautiful and long-lasting finish. If you have any questions, feel free to take out expert advice to address specific concerns or issues.