What Causes Green Algae on Houses?

Green algae on homes is typically caused by moisture, humidity, and organic growth settling on siding and exterior materials. Tennessee’s climate creates ideal conditions for this type of buildup.

Algae tends to grow faster on:

• shaded sides of the home
• areas with heavy tree coverage
• surfaces that stay damp longer
• north-facing walls with limited sunlight

Over time, this growth spreads and becomes more visible, especially on lighter-colored siding.

Why Algae Growth Is So Common in Tennessee

Tennessee’s combination of:

• high humidity
• seasonal rainfall
• pollen and organic debris
• warm temperatures

…creates the perfect environment for algae to grow and spread across homes.

This is why many homeowners notice green staining returning year after year if it is not properly treated.

Why Green Algae Should Be Removed

While it may look like a cosmetic issue, algae buildup can lead to longer-term problems if ignored.

Algae growth can:

• stain siding and exterior materials
• hold moisture against surfaces
• contribute to gradual surface deterioration
• reduce curb appeal

Removing algae early helps prevent more stubborn buildup over time.

What NOT to Do

Many homeowners attempt to clean algae using high pressure or household cleaners.

Avoid:

• pressure washing siding at high force
• scrubbing surfaces aggressively
• using improper cleaning solutions
• ignoring the problem until it spreads

Incorrect cleaning methods can damage siding and still fail to fully remove the algae.

The Right Way to Remove Green Algae

The most effective solution is professional house washing using soft washing methods.

Soft washing uses:

• low-pressure application
• specialized cleaning solutions
• treatment that removes algae at the source

This process safely removes algae and helps prevent it from returning quickly.

Professional House Washing in Tennessee

Exterior Solutions provides professional house washing services designed to safely remove green algae, dirt, and buildup from siding and exterior surfaces.

Our process:

• eliminates algae growth at the source
• protects siding and exterior materials
• restores the appearance of your home

If your home is showing green staining, professional house washing is the safest and most effective solution.

When Should You Clean Algae From Your Home?

If you’re starting to notice:

• green discoloration on siding
• streaking or patchy staining
• buildup that continues to spread

…it’s time to address the issue before it worsens.

Serving Clarksville and Surrounding Areas

Exterior Solutions provides house washing services throughout:

Clarksville
Sango
Pleasant View
Adams
Oak Grove
Hopkinsville