If you’ve noticed dark streaks or green patches starting to show up on your siding, you’re not
alone. Homeowners across Charlotte deal with this all the time, and it usually comes down to
one thing: humidity. At Charlotte Exterior Services, we see it on homes year-round, especially
during the warmer months.
Why Charlotte Is a Breeding Ground for Mold and Algae
Charlotte’s climate creates the perfect setup for mold, mildew, and algae. Warm temperatures
combined with high humidity mean exterior surfaces stay damp longer than they should. When
moisture sits on your siding, especially on shaded areas or north-facing walls, biological growth
can start quickly.
Areas under trees, near landscaping, or sections of the house that don’t get much sun are
usually the first places homeowners notice the problem.
What Those Stains Actually Are
Not all stains on your siding are the same. The black streaks you see are often a type of algae.
Green patches can be mold or moss. Sometimes it looks like a thin green film, which is usually
algae spreading across the surface.
Besides affecting your home’s appearance, this buildup can also wear down your siding over
time. If left untreated, it can cause premature aging and even lead to more costly repairs.
What You Can Do About It
The best way to handle mold and algae is routine exterior cleaning. At Charlotte Exterior
Services, we typically recommend soft washing once a year or every two years, depending on
your home’s exposure. Soft washing removes the stains and treats the root of the growth,
helping slow down how quickly it comes back.
You can also help reduce buildup by:
● Trimming trees and shrubs around your home
● Keeping gutters clean so water doesn’t overflow onto the siding
● Making sure water drains away from your foundation
● Allowing more sunlight to reach shaded areas
The reality is, in Charlotte’s climate, some level of growth is unavoidable. The key is staying
ahead of it before it becomes a bigger issue.
If your siding is starting to show signs of mold or algae, Charlotte Exterior Services can help
restore your home’s exterior safely and effectively.