Composite decking is a low-maintenance favorite for outdoor living, but Michigan’s weather makes regular care essential. Homeowners across Greater Grand Rapids face challenges like snow buildup, spring pollen, and humid summers that can take a toll on their deck’s appearance.
Precision Decks & Patios shares a simple approach for how to clean composite decking and keep it looking its best all year.
Steps for Cleaning Composite Decking
Routine cleaning helps preserve color, prevent mildew, and avoid long-term surface damage. Follow these easy steps to get the job done safely.
- Clear the Deck: Remove furniture, planters, and grills to access every inch of your deck surface. Make sure nothing blocks you from cleaning under tables or around railings.
- Sweep Debris: Use a stiff-bristle broom to sweep away leaves, pollen, and loose dirt. Focus on corners and gaps where buildup is more likely to occur.
- Rinse the Surface: Spray the deck with a garden hose to loosen surface grime. This quick rinse prepares the boards for scrubbing.
- Apply Cleaner: Mix warm water with dish soap or use a composite-safe cleaner. Avoid any cleaner that contains bleach or ammonia.
- Scrub Gently: Use a soft-bristle brush to scrub in the direction of the board grain. This protects the cap layer from scratches while removing dirt.
- Rinse Thoroughly: Make sure all soap and residue are washed away completely. Any leftover cleaner can cause spots or film once dried.
- Dry Naturally: Let the surface air-dry or towel dry any standing water. Avoid replacing furniture until the surface is fully dry.
Tip for Grand Rapids: Clean your deck in spring and fall when temperatures are mild. Avoid winter cleaning, when freezing conditions and snowmelt make the process more difficult.
Tools and Cleaners to Use Safely
Using the right materials is just as important as the method. The wrong tool can damage your deck’s surface or strip the protective finish.
- Soft-Bristle Deck Brush: These brushes offer enough scrubbing power without damaging the cap layer. Always scrub in the direction of the boards for best results.
- Garden Hose with Spray Nozzle: A hose provides the ideal amount of water pressure for rinsing before and after scrubbing. Use a spray nozzle to control the water stream.
- Bucket and Gloves: A clean bucket keeps your solution fresh, and gloves protect your hands from irritation. Wear goggles if using any store-bought composite deck cleaners.
- Mild Dish Soap or Composite Cleaner: Use dish soap like Dawn® or a product specifically made for composite decking. These options clean without leaving residue or damaging the material.
- Optional Pressure Washer (1500–3100 PSI): Use a fan-tip nozzle and keep it 8 inches from the surface. Never concentrate the stream on one area too long.
Avoid using: bleach, ammonia, metal shovels, wire brushes, or acetone-based products. These items can discolor, etch, or weaken composite decking materials.
Common Deck Issues in Michigan and How to Solve Them
Michigan’s climate creates several unique challenges for maintaining composite decks. Here’s how to address the most frequent problems we see in Greater Grand Rapids.
- Mold and Mildew: These thrive in shady, damp environments. Use a 1:4 vinegar-water mix, scrub gently, and rinse thoroughly.
- Grease Stains from Grills: BBQ spills can leave lasting discoloration if ignored. Clean up grease within one week using soapy water and a soft brush.
- Hard Water Spots: Michigan’s mineral-rich water often causes white film or spots. Rinse with vinegar followed by filtered water, and towel dry immediately.
- Tree Sap and Spring Pollen: These sticky residues attract grime and dull the surface. Remove with mild soap and a soft brush, scrubbing gently in the board direction.
- Snow and Ice Damage: Use a plastic shovel with smooth edges for snow removal. Calcium chloride is safe for melting ice without harming your deck.
Why Composite Deck Maintenance Matters
Even low-maintenance decks need seasonal upkeep. Without regular cleaning, buildup and weather exposure will shorten your deck’s lifespan.
- Furniture Pads Prevent Surface Damage: Place pads under chairs and tables to avoid scuffs or gouges. Dragging furniture without protection can scratch the surface permanently.
- Grill Mats Protect High-Traffic Areas: Use mats to catch grease and food spills. This prevents stains that can be hard to remove after they set.
- Pergolas or Shade Structures Help with UV Fading: Protecting your deck from direct sun exposure preserves its color. Shade also helps reduce mold and mildew in wet seasons.
- Sealing Is Not Required: Composite boards are capped, which makes sealing unnecessary. In fact, sealing can void some manufacturer warranties.
- Call a Pro for Major Issues: If your boards are warped, cracked, or heavily stained, a professional can assess the damage. Replacing a single board may require specialized tools.
Protect Your Investment with Composite Deck Cleaning and Maintenance
If you’re wondering how to clean composite decking and want lasting results, Precision Decks & Patios is ready to help. Our team serves homeowners across Greater Grand Rapids with expert maintenance tips and full deck assessments when needed. Reach out today to protect your space and keep your composite deck looking its best.
Composite Deck Cleaning FAQs
What is the best way to clean composite decking?
Use warm, soapy water and a soft-bristle brush for effective cleaning. Scrub in small sections and rinse thoroughly to avoid streaks.
Is vinegar safe for composite decking?
Yes, diluted white vinegar works well for mold and hard water spots. Always rinse after using it to remove any residue.
Do composite decks need to be sealed?
No, sealed surfaces are already built into composite decking. Sealing is unnecessary and may even void warranties.
What should you avoid when cleaning composite decking?
Avoid using bleach, ammonia, wire brushes, or metal tools. These items can cause permanent damage or discoloration.
What protects composite decking from damage?
Use mats in cooking areas and add shade to limit sun exposure. Sweep regularly and clean spills immediately to avoid staining.
