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Composite deck cleaning for Winthrop Harbor homes

Most of our composite deck cleaning calls in Winthrop Harbor come from homes with ranches and split-levels near the lakefront and marina. We see a lot of lake wind and sun that dry out decks, and the work is planned around it.

With Lake Michigan and North Point Marina close by, decks and fences here hold moisture longer in the mornings. We schedule the wash early in the week so there is time to dry before stain goes on.

We clean composite and PVC decks across Lake County with manufacturer-appropriate cleaners and low pressure. The goal is to get the deck back to its original color without leaving wand marks, which are permanent on capped composite.

How the job goes in Winthrop Harbor

  1. Identify the productCapped, uncapped or PVC, and which brand. It decides the cleaner and the pressure.
  2. Clear and protectFurniture, rugs and planters come off. Rugs left on composite are the most common cause of shadow marks.
  3. Apply cleanerA composite-safe cleaner with a sodium percarbonate base, or an oxalic-based one for tannin and rust stains.
  4. Agitate and rinseSoft brush on problem spots, then a low-pressure fan rinse under 1,500 PSI, wand kept well off the surface.

Other work we do in Winthrop Harbor

Homeowners here also ask us about Pergola & gazebo staining in Winthrop Harbor, Deck cleaning in Winthrop Harbor and Dock & pier staining in Winthrop Harbor. See everything on the Winthrop Harbor service area page, or read the full composite deck cleaning guide. We also cover nearby Wadsworth, Old Mill Creek and Zion.

Get a number for Winthrop Harbor

Text a photo of your deck or fence and get a number back. Include your town and a rough size.

Text (224) 944-8652

What affects the price in Winthrop Harbor

  • Deck size and layout
  • Type of composite: uncapped first-generation boards hold more mildew than capped or PVC
  • How heavy the mildew or staining is
  • Rug shadows, grill grease and tannin stains that need spot treatment
  • Whether railings are composite, aluminum or wood

Details on the pricing page.

Winthrop Harbor composite deck cleaning FAQ

Can composite decks be pressure washed?

Only at low pressure with a wide tip. Manufacturers generally cap it around 1,500 PSI held a foot or more away. Higher than that, or a narrow tip, will scar the surface.

What are the black spots on my composite deck?

Almost always mildew growing in the surface texture, fed by pollen and moisture. A composite-safe cleaner removes it. Bleach alone will lighten it and leave it to come back.

How far in advance should I book composite deck cleaning in Winthrop Harbor?

Two to four weeks in spring and early fall, which are the busiest windows. Midsummer usually has more availability. Text photos and your town and we will give you a date with the quote.

Do you charge extra to come to Winthrop Harbor?

No. Winthrop Harbor is inside Lake County, and we cover the whole county from Libertyville with no trip charge.

Composite deck cleaning in Winthrop Harbor

Text a photo of the wood. Quotes usually come back the same day.

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