Keeping your MoistureShield deck clean is simple with the right methods. This guide covers how to clean MoistureShield decking, remove stains, prevent mold, and maintain lasting performance year-round.

How to Clean MoistureShield Decking: Full Care Guide

Composite decking performs best when cared for properly, and MoistureShield boards are no exception. Whether you own Stratos, Vision, Meridian, Elevate, or Vantage, keeping the surface clean will help maintain color, traction, and long-term durability. This guide breaks down how to clean MoistureShield decking using brand-approved methods, safe cleaners, and practical maintenance tips straight from real-world use and MoistureShield’s care recommendations.

From dirt and mold to tannins and grease spills, you’ll learn exactly how to keep your composite deck looking its best year-round.

Understanding MoistureShield Decking

MoistureShield is unique compared to many other composite brands. Their boards contain an advanced moisture-resistant core, and some series include additional cap layers that increase stain and scratch resistance. Because of these differences, cleaning methods vary slightly between capped and uncapped boards:

  • Stratos – Composite enhanced PVC with CoolDeck® Technology
  • Vision, Meridian & Elevate – Capped composite with improved stain/scratch resistance.
  • Vantage – Uncapped composite requiring more careful cleaning and a weathering period.

Important Note: MoistureShield Vantage boards must weather naturally for 3–6 months before deep cleaning. Capped lines can be cleaned at any time.

What to Know Before Cleaning Your MoistureShield Deck

Small steps can prevent surface damage to your MoistureShield deck and ensure better results:

  1. Always test cleaners on a hidden section first
  2. Never mix chemicals (bleach + ammonia = toxic)
  3. Pre-rinse surrounding plants and shrubs
  4. Wear gloves and eye protection when using chemical cleaners
  5. Clean spills early – especially on capped boards with stain warranties
  6. For warranty coverage: clean staining agents within one week
Key cleaning tips and maintenance guidelines for MoistureShield composite decking.
Sweeping dirt, dust, and debris off MoistureShield decking for regular maintenance.

Routine Cleaning – Dirt, Dust & Everyday Debris

Routine cleaning is the foundation of deck care. Weekly or bi-weekly sweeping helps prevent tannins, mold, and water spots.

Steps to Clean Dirt and Debris

  1. Sweep or use a leaf blower to remove loose material
  2. Mix warm water with a mild household soap
  3. Scrub gently using a soft nylon brush
  4. Rinse thoroughly with warm water

MoistureShield recommends rinsing the deck periodically with a fan-tip nozzle at pressures up to 1000 PSI.

Removing Mold, Mildew & Bio-Based Stains

Moisture-rich or shaded environments can encourage mold and mildew. Clean these stains as soon as they appear to avoid deeper discoloration.

Approved Cleaners (Bleach-Based)

  1. Olympic® Premium Deck Cleaner
  2. Mold Armor® Deck Wash
  3. BEHR® No. 63 All-In-One Wood Cleaner

Note: These can lighten the surface – apply across the entire deck for even color.

Steps for Removing Mold & Mildew

  1. Apply cleaner based on manufacturer instructions
  2. Allow proper dwell time
  3. Scrub with a nylon brush
  4. Rinse thoroughly with warm water

After cleaning, apply Spray & Forget once a year in high-mold environments for prevention.

Treating mold and mildew on MoistureShield composite decking.
Cleaning tannin stains and water marks on MoistureShield decking with an oxalic acid cleaner.

Cleaning Tannin Stains, Water Marks & Rust Stains

MoistureShield composite boards with wood fibers can temporarily develop tannin stains. These appear as bluish-black marks but are normal and fade over time.

Best Cleaners for Tannins & Rust

  1. Cleaners containing oxalic acid
  2. Cleaners containing phosphoric acid
  3. BEHR® No. 63 (works for both tannins & rust)

Cleaning Steps

  1. Apply the brightener or composite cleaner
  2. Scrub gently
  3. Rinse thoroughly
  4. For even appearance, treat the full deck surface

Cleaning Grease, Food Spills & Oil Stains

Grease stains should be cleaned immediately – especially on capped MoistureShield lines covered by a stain warranty.

Approved Degreasers

  1. Dish soap (Dawn®)
  2. Super Clean™ Degreaser
  3. Pour-N-Restore (for older, deeper oil stains)

Cleaning Steps

  1. Rinse area with warm water
  2. Apply degreaser
  3. Scrub with nylon brush
  4. Rinse thoroughly

Use grill mats under grills to prevent new stains.

Guide showing how to clean MoistureShield decking by removing tannin stains and water marks with an oxalic acid cleaner.
Removing chalk line marks from MoistureShield decking using soap and warm water.

Removing Chalk Line Marks

If chalk lines are used during installation:

  1. Only use white or blue chalk.
  2. Never use red chalk.
  3. Clean with hot water and mild soap.

Note: Red chalk pigments are permanent and often cannot be removed.

Pressure Washing MoistureShield Decking

Pressure washing is allowed – but only by following proper guidelines.

MoistureShield Pressure Washing Rules

  1. Use a fan-tip nozzle only.
  2. Keep wand 10–12 inches from the boards.
  3. Do not exceed 1300 PSI.
  4. Move in smooth, controlled strokes.
Safely pressure washing MoistureShield decking with a 1300 PSI fan-tip nozzle.
Inspecting light scratches and surface abrasions on MoistureShield decking before repair.

Fixing Scratches & Surface Abrasions

Surface damage depends on the series:

PVC Stratos

  1. More scratch resistant
  2. Light scratches may blend over time

Capped Lines (Vision, Meridian, Elevate)

  1. More scratch resistant
  2. Light scratches may blend over time

Uncapped Vantage

  1. Light scratches fade naturally in 12–16 weeks
  2. Deep scratches may require board replacement

Never Do This on MoistureShield Boards

  1. Do not sand composite decking.
  2. Do not apply wood fillers or putty.
  3. Do not paint, stain, or seal composite boards.

Snow & Ice Removal

Winter maintenance is essential to protect the surface.

Safe Practices

  1. Use clear ice melt or rock salt (safe for concrete/flagstone).
  2. Sweep leftover salt with a broom.
  3. Rinse deck once temperatures rise.

Do Not

  1. Use metal shovels
  2. Use ice picks
  3. Use sand (very abrasive)
Removing snow and ice from MoistureShield decking using safe, non-metal tools.
List of things to avoid when cleaning MoistureShield decking, including sand and harsh chemicals.

Things to Avoid When Cleaning MoistureShield Decking

To prevent damage:

  1. Don’t drag heavy furniture.
  2. Don’t use harsh solvents (acetone, gasoline, paint thinner).
  3. Don’t mix cleaning chemicals.
  4. Don’t ignore standing water – ensure proper ventilation.
  5. Don’t apply sand for traction.
  6. Don’t exceed pressure washer guidelines.

Final Advice for Keeping Your MoistureShield Deck Like New

Understanding how to clean MoistureShield decking gives you everything you need to maintain long-lasting beauty and performance. Regular sweeping, timely spill cleanup, and safe use of approved cleaners will keep the surface looking sharp season after season. Treat mold quickly, address stains as they happen, and pressure wash only within MoistureShield’s recommended guidelines.

Seasonal care also matters. Rinse your deck after winter, avoid harsh solvents year-round, maintain airflow beneath the structure, and keep the surface free from organic debris to reduce tannin and mold development.

If you need additional help, replacement boards, cleaning products, or expert guidance, visit our showrooms in Plainfield, IL and Spring Grove, IL, or shop online anytime through our store. We’re here to make your MoistureShield deck last – and look great doing it.

Top 5 FAQs About How to Clean Deckorators Decking

How often should I clean my MoistureShield deck?

You should clean it at least twice a year, but more frequent maintenance helps reduce buildup and makes the entire process easier. If you’re wondering how to clean MoistureShield decking effectively, regular sweeping and seasonal washing are the foundation.

Can I pressure wash MoistureShield decking safely?

Yes, as long as you follow MoistureShield’s guidelines. Use a fan-tip nozzle, keep pressure below 1300 PSI, and stay 8–10 inches away from the surface. These steps are part of how to clean MoistureShield decking without damaging the boards.

What should I use to remove tough stains like rust, tannins, or water spots?

Use cleaners containing oxalic acid or phosphoric acid, following the manufacturer’s directions. These products brighten the surface and help lift stubborn stains. For anyone learning how to clean MoistureShield decking thoroughly, these cleaners are the most effective option for deep stain removal.

Are harsh chemicals or sanding recommended for MoistureShield decking?

No. Never sand MoistureShield boards, and never apply harsh solvents like acetone, gasoline, benzene, paint thinner, or deck stains. These will damage the surface and void your warranty.

What’s the safest way to remove snow and ice from MoistureShield decking?

Use a plastic shovel or push broom only. Avoid metal tools and ice picks, and never use sand. Apply ice melt that’s labeled safe for concrete and flagstone, then rinse away the residue when the weather warms.

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