How to Remove Green Algae from Your Vinyl Siding in The Woodlands, Texas.

Table of Contents

As part of routine care for your home in The Woodlands, Texas, it’s crucial to inspect your siding for signs of wear or damage and to keep it clean to maintain the appearance and longevity of this durable material.

As with any exterior finish, vinyl siding can become dirty over time due to an accumulation of dirt and grime, most of which can be removed with a simple spray of the hose.

But if you notice the appearance of green stains during your inspection, you’ll need to take a different approach. Read on for some valuable tips for how to remove green algae from vinyl siding, from the knowledgeable professionals at Streamline Painting & More.

What Causes Vinyl Siding to Turn Green?

Since it was first introduced in the late 1950’s vinyl siding has gained popularity due to its versatility, strength, and ability to weather the elements. However, while the polymer material may be able to withstand high winds and harsh UV rays, it is still susceptible to staining, including a green discoloration caused by one of the following:


Mold growth can occur when there is an ongoing issue with water leakage or improper drainage, from sources such as a drainpipe or gutters.
Once the necessary repairs or adjustments have been made, the mold removal can begin.
But because mold can be difficult to remove and might require the use of harsh chemicals, you may want to consult a professional for assistance.


Algae growth typically occurs in areas where dirt and dust have collected, as the organic material is used as a source of food.
The algae may appear brown or green and remain damp, diminishing the appearance of your home and spreading out over time.
Unlike mold, this type of growth is mainly cosmetic and can be removed using minimal force and a few basic materials.

How to Remove Algae from Siding

Gather your materials.

You will need:

• Duct tape
• Plastic sheeting
• Large bucket
• Garden hose with a spray attachment or power washer
• Oxygen bleach
• Long-handled scrub brush
• Water-resistant footwear and gloves

Safeguard The Exterior.

Protect vulnerable entry points on your home’s exterior, such as electrical outlets, exhaust vents, and more by covering them or taping them closed with duct tape. Use plastic sheeting over top of plants and landscaping that are near the home, and ensure all doors and windows are closed.

Mix Your Cleaning Solution.

Fill a bucket with warm water and mix in the oxygen bleach powder according to the package directions.

Test A Small Area.

Dip the scrub brush into the solution and test it to see if it is effective at removing the staining. If not, the green discoloration may be mold.

Apply Some Elbow Grease.

Begin at the top of the house and work your way down, dipping the scrub brush into the mixture and applying force with a side to side motion. Divide the project into manageable, 20-foot sections, rinsing each one well from the top down once completed.

The Bottom Line

Once you know how to remove green algae from vinyl siding and help to prevent it from returning, you can move on to other interior and exterior spring cleaning projects, including pressure washing exterior surfaces such as your driveway, deck, or sidewalks using these tips.

If you need professional help with your home exterior painting project and restoring your discolored trim in The Woodlands, TX, or Conroe, TX, our team at Streamline Painting & More can assist.
To get started with us, book a FREE estimate below or call us on 936-718-8354 for more details.

Make painting a breeze with our insider tips and tricks!
Ready to make your home the talk of the town?

Imagine coming home to a space that feels like a true reflection of your personality and style. A space that makes you feel energized, refreshed, and proud. Don’t wait any longer to transform your home!

About the author
Picture of Kyle Caywood
Kyle Caywood

Owner of Streamline Painting

Share this article
Ready to transform your home into a work of art? Contact us now and let our expert painters bring some color into your life!