Pressure washing Trex decking can be a delicate task, as excessive pressure can cause damage to the composite material. This comprehensive guide will provide you with the necessary information to safely and effectively pressure wash your Trex deck, ensuring it maintains its pristine appearance for years to come.
Safety Precautions
Pressure Limit
When pressure washing a Trex deck, it’s crucial to use a pressure washer with a maximum pressure of 3100 PSI. Exceeding this limit can lead to irreparable damage to the composite material, such as gouging, etching, or even cracking. It’s recommended to start at the lower end of the pressure range and gradually increase as needed, carefully monitoring the deck’s surface for any signs of distress.
Nozzle Selection
The choice of nozzle is equally important when pressure washing Trex. Opt for a fan tip with a 40-60 degree spread, as this will provide an even distribution of the water pressure across the deck’s surface. Narrower nozzles, such as a 0-degree or 15-degree tip, should be avoided as they can concentrate the water pressure and potentially cause damage.
Distance
Maintaining the proper distance between the pressure washer nozzle and the Trex deck is crucial. It’s recommended to keep the nozzle at least 18 inches (1.5 feet) away from the deck’s surface. This distance helps to prevent the water pressure from being too concentrated, which could lead to gouging or other surface damage.
Cleaning Methods
Soap and Water
When pressure washing a Trex deck, it’s best to use a gentle, pH-neutral soap and warm water. Avoid harsh chemicals, bleach, or acid-based cleaners, as they can damage the composite material and potentially void the manufacturer’s warranty.
Scrubbing
In addition to pressure washing, it’s often necessary to use a soft-bristle brush to scrub the deck, especially for stubborn stains or built-up dirt and grime. Gently scrubbing the surface can help to loosen and remove any persistent contaminants.
Rinsing
After cleaning the deck with soap and water, it’s essential to thoroughly rinse the surface with clean water. This step ensures that all soap residue and debris are removed, leaving the Trex deck clean and ready for use.
Specialized Cleaning Situations
Oil, Grease, and Food Spills
For oil, grease, or food spills on a Trex deck, use warm soapy water and a soft-bristle brush to clean the affected area. It’s crucial to address these types of spills as soon as possible to prevent staining or discoloration of the composite material.
Mold and Mildew
To remove mold and mildew from a Trex deck, use a hose, warm soapy water, and a soft-bristle brush. Gently scrub the affected areas to lift and remove the fungal growth, then rinse thoroughly with clean water.
Hard Water Stains
Hard water stains can be a common issue on Trex decking, especially in areas with high mineral content in the water supply. To clean these stains, use a solution of white vinegar and water, applying it to the affected areas and allowing it to sit for a few minutes before rinsing.
Additional Tips
Regular Cleaning
To maintain the appearance and longevity of your Trex deck, it’s recommended to clean the surface semi-annually, typically in the spring and autumn. This regular cleaning routine will help to prevent the buildup of dirt, debris, and other contaminants that can lead to discoloration or damage.
Avoid Aggressive Chemicals
When cleaning a Trex deck, it’s crucial to avoid using aggressive chemicals, such as acetone, solvents, or harsh cleaners. These types of products can cause irreversible damage to the composite material, leading to discoloration, cracking, or other surface issues.
Warranty Considerations
It’s important to note that using high-pressure washing or harsh chemicals on a Trex deck can potentially void the manufacturer’s warranty. Always refer to the Trex care and cleaning guidelines to ensure that your cleaning methods align with the warranty requirements.
Technical Specifications
Pressure Washer Settings
For wooden decks, it’s recommended to start at the lowest pressure setting, around 500 PSI, and gradually increase the pressure as needed. However, for Trex composite decking, the maximum pressure should be limited to 3100 PSI to avoid damage.
Nozzle Angle
When pressure washing a Trex deck, use a fan tip nozzle with a 40-60 degree spread. This wider angle helps to distribute the water pressure evenly across the surface, preventing concentrated areas of high pressure that could lead to gouging or etching.
Reference Links
By following the guidelines and technical specifications outlined in this comprehensive guide, you can safely and effectively pressure wash your Trex deck, ensuring it maintains its beautiful appearance and long-lasting durability for years to come.