Did you pressure wash your home, driveway, or sidewalk only to see the green or black stains return a few months later? You’re not imagining it. In many cases, pressure washing removes the visible growth but doesn’t eliminate the underlying algae spores that cause the problem.
Why Algae Returns So QuicklyMany homeowners assume that if the surface looks clean, the problem is gone.
Unfortunately, algae often survives beneath the surface or in microscopic pores that ordinary cleaning cannot fully reach.
Pressure washing can remove:
• visible staining
• dirt and surface buildup
• loose organic growth
But it may not fully eliminate the organisms causing the discoloration.
As a result, algae often returns within months, especially in humid environments like Tennessee.
Tennessee provides ideal conditions for algae growth.
Factors include:
• high humidity
• frequent rainfall
• shaded areas
• tree cover and organic debris
• warm seasonal temperatures
These conditions allow algae to spread quickly when spores remain behind after cleaning.
One of the biggest misconceptions about exterior cleaning is that all cleaning methods accomplish the same thing.
Pressure washing primarily removes surface contaminants.
Soft washing is different because it uses specialized cleaning solutions designed to:
• kill algae at the source
• eliminate organic growth
• reduce rapid regrowth
• provide longer-lasting results
This is why professionally soft-washed surfaces often stay cleaner much longer.
Recurring algae growth is commonly found on:
• house siding
• roofs
• driveways
• sidewalks
• decks
• fences
Any surface exposed to moisture and limited sunlight can become a breeding ground for algae.
Many homeowners rent pressure washers expecting a permanent solution.
Unfortunately:
• the wrong pressure can damage surfaces
• algae spores often remain behind
• results are usually temporary
Without proper treatment, the same discoloration often returns.
The most effective approach is professional cleaning combined with treatment methods designed to address the root cause of algae growth.
Depending on the surface, this may include:
• house washing using soft washing methods
• roof soft washing for algae-stained shingles
• professional concrete cleaning for driveways and sidewalks
The goal is not simply to remove stains—but to reduce the likelihood of rapid regrowth.
Exterior Solutions helps homeowners throughout Clarksville and surrounding communities remove algae from siding, roofs, concrete, and other exterior surfaces.
Our cleaning methods are designed to provide longer-lasting results while protecting the materials being cleaned.
If algae keeps coming back after pressure washing, it may be time for a different approach.
Exterior Solutions provides exterior cleaning services throughout:
Clarksville
Sango
Pleasant View
Adams
Oak Grove
Hopkinsville
Get Your Free Estimate Now