What Causes a Deck to Turn Green?

The green discoloration that appears on decks is typically caused by algae and organic growth feeding on moisture trapped on the surface.

This is especially common on:

• wood decks
• composite decking
• shaded outdoor living areas
• decks surrounded by trees and landscaping

Because decks are regularly exposed to rain, humidity, and debris, they provide an ideal environment for algae growth.

Why Green Decks Become Slippery

The green layer covering your deck is more than just a cosmetic issue.

Algae buildup can create:

• slippery walking surfaces
• unsafe conditions after rain
• trapped moisture against decking materials
• premature weathering and deterioration

Many homeowners first notice the problem when the deck becomes slick underfoot.

Why Tennessee Decks Are Especially Vulnerable

Tennessee’s climate creates ideal conditions for algae growth.

Factors include:

• high humidity
• seasonal rainfall
• shaded backyards
• tree cover and organic debris
• warm temperatures throughout much of the year

Without regular cleaning, algae can continue spreading across the deck surface.

What NOT to Do

Many homeowners attempt to clean decks using excessive pressure.

Avoid:

• pressure settings that damage wood fibers
• aggressive cleaning that scars decking materials
• household chemicals not intended for exterior surfaces
• allowing algae to continue spreading unchecked

Improper cleaning can shorten the life of your deck and leave permanent surface damage.

The Best Way to Clean a Green Deck

The safest solution depends on the decking material and level of buildup.

Professional cleaning helps:

• remove algae and organic growth
• restore the appearance of the deck
• improve safety by reducing slippery surfaces
• prepare wood for staining or sealing when needed

Using the proper cleaning method is critical to avoid damaging the deck surface.

Professional Deck Cleaning in Clarksville, TN

Exterior Solutions provides professional deck cleaning and wood restoration services throughout Clarksville and surrounding communities.

Our process safely removes algae, dirt, and environmental buildup while helping preserve the appearance and condition of your outdoor living space.

If your deck is turning green, professional cleaning can restore both safety and appearance.

When Should You Clean Your Deck?

If you notice:

• green discoloration
• slippery areas
• dark staining
• heavy organic buildup

…it’s time to clean the surface before the problem becomes more difficult to remove.

Serving Clarksville and Nearby Areas

Exterior Solutions provides deck cleaning and wood restoration services throughout:

Clarksville
Sango
Pleasant View
Adams
Oak Grove
Hopkinsville