What Is The Green Stuff on My Siding?

After purchasing a new home or freshly painting your house’s siding, you’ll inevitably encounter the dreaded green stuff that slowly coats the side of your house. All good things must come to an end. But what if you could renew your home’s beauty without having to repaint every other year?

At Activate Pressure Washing, we can remedy the mysterious green stuff on your home’s exterior with power washing. We can also identify it. Learn all about it below.

#1 Green Mold

You’ve probably heard of black mold which lurks in bathrooms, kitchens, and other dark, damp places. Green mold has similar habits, preferring areas with little sunlight and lots of moisture, especially after rain. It thrives on the northernmost side of your house because the sun never touches that area. Plus, grass clippings, dirt, and decaying matter feed it.

Green mold can slowly eat away at wooden materials, making the structure weaker. It can also pose respiratory health risks that could affect your family members.

#2 Green Mildew

Mildew likes a similar environment as the green or black mold. It flourishes in cool, damp areas. A flat surface provides the perfect spot to spread its spores and colonize the space quickly.

Green mildew has a sickly green color. It can look fuzzy when examined up close.

#3 Algae

Algae aren’t especially harmful to your health or your home. However, it can range from vibrant green to deep, slimy black, making it easy to see from a distance. It thrives in wet environments. So a leak or a water supply that constantly drips facilitates easy growth and spread.

It is also among the easiest organisms to eradicate with a proper cleaning solution. Since an algae colony stays wet, it slides off the siding with some water pressure.

#4 Organic Matter

Have you cut your grass lately? Did strong winds move through your area? These things can also lead to greenish siding. While organic plant matter and dirt aren’t an immediate threat to your home, the materials can feed mold, mildew, and algae.

Thus, you’ll want to rinse your home’s siding off following lawn mowing sessions. If organisms can’t eat, they won’t stick around.

How Professional Power Washing Can Help

Power washing can solve each of these issues. Not only do professional services eliminate unsightly green patches, but they can also keep your family a little safer from invisible organic invaders.

Residential and commercial pressure washers can reach high places safely, saving you from the most hazardous parts of the task. They also use a carefully formulated surface cleaner to make your siding’s environment inhospitable to organic growth.

Call Activate Power Washing for a Free Estimate

Ready to eliminate all that green stuff from the side of your house? Get in touch with skilled power washers! We do power washing which keeps nasty substances and creepy bugs from trying to share your home with you. Call Activate Pressure Washing at 512-696-5770 to get a free estimate on how much a pressure washer service will cost.


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