Preventing Mold & Mildew on Awnings in Florida

Florida's combination of heat, humidity, and frequent rain creates the perfect environment for mold and mildew growth. If you're investing in an awning, understanding how to prevent and address these issues is essential for protecting your investment and keeping your outdoor space looking its best.

Why Mold and Mildew Are Common on Florida Awnings

Mold and mildew are fungi that thrive in warm, moist environments—exactly what Florida provides for most of the year. They can grow on almost any organic surface, and awning fabrics can collect the pollen, dust, and debris that serve as food sources for these organisms.

Left unchecked, mold and mildew can:

• Cause permanent staining and discoloration
• Weaken fabric fibers over time
• Create musty odors
• Potentially trigger allergies for those nearby

Choosing Mold-Resistant Awning Materials

The best defense against mold starts with choosing the right awning fabric. Look for these features when shopping:

Solution-Dyed Acrylic (Like Sunbrella)

Solution-dyed acrylic fabrics are the gold standard for Florida awnings. The color is embedded throughout the fiber (not just on the surface), and these fabrics are treated with mold and mildew inhibitors during manufacturing. Sunbrella, the most popular brand, offers a 10-year warranty against mold and mildew damage.

Vinyl-Coated Polyester

Vinyl-coated fabrics are naturally resistant to mold because they don't absorb moisture. They're easier to clean but may not be as breathable or aesthetically pleasing as acrylic options.

Materials to Avoid

Cotton canvas and untreated polyester are poor choices for Florida's climate. They absorb moisture, dry slowly, and provide ideal conditions for mold growth.

Maintenance Schedule for Florida Awnings

Regular maintenance is key to preventing mold problems. Here's a recommended schedule:

How to Clean Mold and Mildew from Your Awning

If you notice mold or mildew spots, address them promptly before they spread:

Step 1: Brush Off Loose Debris

Use a soft-bristle brush to remove any loose dirt, leaves, or debris. Work gently to avoid damaging the fabric or pushing mold deeper into the fibers.

Step 2: Prepare a Cleaning Solution

For solution-dyed acrylic fabrics like Sunbrella, mix:

• 1 cup of bleach
• 1/4 cup of mild dish soap
• 1 gallon of water

Important: Always check your awning manufacturer's cleaning recommendations first. Some fabrics may require different cleaning solutions.

Step 3: Apply and Soak

Apply the solution to the affected areas and let it soak for 15-20 minutes. For stubborn mold, you may need to let it sit longer, but don't let the solution dry on the fabric.

Step 4: Scrub Gently

Use a soft brush to scrub the mold spots. Work in circular motions and avoid excessive pressure that could damage the fabric coating.

Step 5: Rinse Thoroughly

Rinse the entire awning with clean water until all soap residue is removed. Soap left behind can actually attract more dirt and promote mold growth.

Step 6: Allow to Dry Completely

This is critical in Florida's humid climate. Leave the awning extended in full sun until completely dry before retracting. Storing a damp awning is the fastest way to develop mold problems.

Tips for Preventing Future Mold Growth

• Maximize airflow: When possible, leave some space for air circulation around the awning
• Retract when not in use: A retracted awning stays drier and is less exposed to pollen and debris
• Trim nearby vegetation: Overhanging branches drop debris and block sunlight that helps dry the fabric
• Apply fabric protector: After deep cleaning, apply a fabric guard product designed for outdoor use
• Never store wet: If the awning is wet, wait for it to dry before retracting

When to Call a Professional

Consider professional cleaning if:

• Mold covers a large area or has penetrated deep into the fabric
• DIY cleaning hasn't resolved the problem
• The awning is difficult to access safely
• You're unsure about the proper cleaning method for your specific fabric

Many awning installers offer maintenance services or can recommend trusted cleaning professionals in your area.