How to Clean Composite and PVC Decking: A Homeowner’s Guide for King County
How to Clean Composite and PVC Decking: A Homeowner’s Guide for King County
If you live in King County, you know that the Pacific Northwest climate brings beauty—and a lot of rain. While composite and PVC decking are built to last through it all, regular maintenance is essential to keep your outdoor space looking sharp and performing well.
At Petra Decks, we specialize in helping local homeowners maintain and protect their investments. Here’s your go-to guide for cleaning composite and PVC decks the right way—whether you’re prepping for summer barbecues or just want to avoid slippery, mildew-covered boards in the rainy season.
Why Maintenance Matters in King County’s Climate
King County’s damp weather is the perfect breeding ground for mold, mildew, and algae. Composite and PVC decks are more resistant than wood, but they’re not immune. Regular cleaning helps:
Extend the life of your deck
Prevent discoloration and buildup
Maintain a slip-resistant surface
Preserve your home’s curb appeal
Step-by-Step: How to Clean Your Composite or PVC Deck
1. Sweep and Remove Debris
Use a broom or leaf blower to clear away dirt, leaves, and twigs. Organic matter can trap moisture and stain your boards over time.
2. Rinse with a Garden Hose
Before applying any cleaners, give the surface a thorough rinse with your garden hose to remove loose dirt.
3. Use a Composite Deck Cleaner
Choose a cleaner that’s safe for composite or PVC materials. Avoid harsh chemicals like bleach that can degrade the surface. Follow the product instructions carefully.
DIY Option: Mix warm water with mild dish soap and scrub with a soft-bristle brush.
4. Scrub Gently
Work in small sections, scrubbing with the grain of the decking to lift stains and algae. Pay extra attention to shady areas or spots under planters and furniture.
5. Rinse Again
Use your hose to rinse away all cleaning solution. Standing residue can leave a film or cause fading.
6. Let It Dry
Allow the deck to air dry completely. Avoid walking on it until it’s dry to prevent slipping.
⚠️ What to Avoid
Power washing too close – High pressure can damage the surface.
Steel brushes – These can scratch and leave rust marks.
Neglecting the gaps – Clean between boards to allow proper drainage.
Local Tip:
Spring and early fall are the best times to clean your deck in King County. Avoid freezing temps and make the most of dry days!
Why Choose Composite Decking in the Pacific Northwest?
Living in the Eastside means embracing wet winters and beautiful summers. Composite decking is ideal for this climate:
Resists moisture, rot, and mold
Low maintenance with long-lasting color
Perfect for entertaining year-round
We offer top brands like Trex and Azek for unbeatable performance and aesthetic appeal.
Get a Free Consultation for Your Decking Project
Whether you’re looking for a modern composite deck or classic wood-look finishes, our team is here to help you create an outdoor retreat that fits your lifestyle.
📍 Proudly serving Sammamish, Snoqualmie, Issaquah, North Bend, Kent, Auburn, Renton, Maple Valley, Covington, Black Diamond, Bellevue, Redmond, West Seattle, Mercer Island and surrounding areas!
📞 Call us or request a free quote online today!