Have you noticed black streaks or patches creeping along the edges of your windows? That unsightly black stuff is probably black mold, and it’s more than just an eyesore—it can cause health risks and indicate more serious issues. If you're wondering what it is, why it’s there, and how to get rid of it, you're in the right place. The team at Brahler Contracting breaks it all down for you.

What Is Black Mold?

Black mold, scientifically known as Stachybotrys chartarum, is a type of fungus that thrives in damp, humid environments. It often appears as dark green or black spots and has a musty odor. While black mold is commonly associated with water damage and poor ventilation, it frequently grows around windows due to condensation buildup, leaks, or old, deteriorating frames that trap moisture.

Is Black Mold Dangerous?

Yes, it is for your health and home. Black mold isn’t just an aesthetic problem—it can cause a variety of health issues, particularly for people with allergies, asthma, or weakened immune systems. Exposure to mold spores can lead to:

• Respiratory problems – Persistent coughing, wheezing, and shortness of breath
• Allergic reactions – Sneezing, runny nose, itchy eyes, and skin irritation
• Worsened asthma symptoms – Increased attacks and breathing difficulties
• Fatigue and headaches – Prolonged exposure may lead to general malaise

If mold is growing around your windows, you may also have excess moisture problems in your home, which can contribute to structural damage over time. It's important to remove the mold as soon as possible.

How to Get Rid of Black Mold Around Your Windows

While mold removal is essential, it's equally important to address the root cause of moisture buildup. Mold spores can become airborne when disturbed, so proper protection is very important. Here’s a step-by-step guide to getting rid of black mold and preventing its return:

Step 1: Protect Yourself

Before you start cleaning, put on protective gear, including:

• Rubber gloves
• A face mask (N95 recommended)
• Goggles
• Long sleeves and pants

Step 2: Prepare a Cleaning Solution

You can use one of the following mold-killing solutions:

• White vinegar (undiluted) – A natural antifungal that kills mold effectively
• Hydrogen peroxide (3%) – A non-toxic disinfectant that breaks down mold spores
• Bleach solution (1 cup of bleach per gallon of water) – Strong but effective (not recommended for porous surfaces)

Step 3: Scrub the Affected Areas

• Dip a scrub brush or sponge into the cleaning solution and scrub the moldy spots thoroughly.
• Let the solution sit for 10–15 minutes to kill mold spores.
• Wipe the area with a clean, damp cloth.

Step 4: Dry the Area Completely

Use a fan, dehumidifier, or open windows to ensure the area dries thoroughly. Mold thrives in moisture, so proper drying is key to preventing regrowth.

Step 5: Fix the Moisture Problem

• If your windows are drafty or leaking, moisture will continue to build up, making mold a recurring issue.
• Improve ventilation by using exhaust fans or opening windows when cooking or showering.
• Use a dehumidifier to reduce indoor humidity levels (aim for 30-50%).
• If you notice condensation inside the glass panes, your windows may have failed seals, which means they’re no longer insulating properly.

Is It Time for Replacement Windows? 

If that annoying black mold keeps reappearing despite your best efforts to remove it, you should consider investing in new windows. This is especially true if your Schuylkill County home is an older one. Your probably have poor seals, warped frames, or cracked caulking that allow moisture to seep in, creating the perfect environment for mold growth.

Consider replacing your windows if:

• You frequently see condensation inside the glass panes.
• Your windows feel drafty or have visible gaps.
• The frames are warped, cracked, or rotting.
• Mold growth keeps returning despite cleaning efforts.

Contact Brahler Contracting For A Free Consultation

Black mold around your windows is more than just an unsightly nuisance—it’s a sign that moisture problems need to be addressed. While cleaning can help in the short term, persistent mold growth is often a signal that it’s time for replacement windows. Investing in new, well-sealed windows will protect your home, health, and increase your home's oveall value.

The team at Brahler Contracting has assisted many homeowners find the perfect window replacement. Contact us today and let's get rid of that annoying mold.