Mold Inside of Windows: Frequently Asked Questions

Dealing with mold on your window sills and looking for a quick fix? Homespire Windows and Doors is here to help tackle some of the biggest questions surrounding window mold, including how to get rid of it.

Once mold has taken root on your windows, it’s a sure sign there’s a more serious problem underway. Learn more about what causes mold, why it’s dangerous and how to give your windows a quick fix below. If you’re in need of window replacements, we’re here to help.

Why Is There Mold on the Inside of My Windows?

Mold grows best in moist and dark conditions. It commonly develops in and around window sills as a result of leaking rain on the outside or condensation on the inside of your window. This may be a result of poor window seals or a lack of proper ventilation. If you don’t dust your glass panes regularly, the dust may accumulate organic matter, leading to mold growth.

To prevent mold from growing inside your windows, you need to keep the join between your glass and wood or aluminum frame clean. This includes keeping it free of dust and moisture, both of which speed mold growth. Scrub these parts of your window regularly. You might also want to consider reducing your home’s humidity levels by resetting the humidifier and removing any indoor plants.

You’re most likely to see mold growing on windows that are exposed to high amounts of moisture, like a bathroom window. Keep a close eye on these areas to spot mold early.

Is Window Sill Mold Dangerous?

Typical window sill mold doesn’t pose a serious danger, but it can trigger allergies that come with uncomfortable symptoms. These symptoms may include sneezing, itchy or watery eyes, dry skin, a runny nose, and a cough. Some cases of mold can produce toxic mycotoxins, like black mold, which is a health hazard. Black mold toxins can lead to a more serious case of mold poisoning.

In addition to health issues, black mold can stain your window sills, rot your wood, and create a musty smell inside your home. If you notice any mold accumulating in your window sill, you should get rid of it immediately.

How Do You Remove Mold From a Double-Pane Window?

To remove mold from a double-pane window, drill a hole in the corner of the glass with the help of a professional glazier. Spray cleaning solution between the panes, then clean out the solution and get rid of any moisture. A professional will then use a defogger machine to get rid of any remaining moisture.

If you’re able to remove one of the panes yourself, you can make your own DIY mold scrub using bleach and warm water. Scrub the mold from your windowsill with a non-abrasive brush, then wipe away the loose mold using a clean rag. Be sure to cover your nose and mouth during this process to avoid breathing in allergens and triggering irritating symptoms.

What Does Black Window Sill Mold Mean?

Black mold is a type of fungus with a dark green or black appearance. It thrives in warm and moist environments, often growing in confined spaces like window sills. As they’re toxigenic, they can release irritating or even dangerous toxins that can cause mold poisoning over time. If you notice black mold on your window sills — or notice symptoms of mold poisoning — it means it is time for a deep and thorough cleanse.

Call experts to help you handle double-paned glass, or carefully scrub your window clean using bleach. Cover your nose and mouth during this process to avoid breathing in black mold toxins. Since mold can be symptomatic of a larger issue with your window sill, it may be time to consider replacing it entirely.

Can Mold on Windows Make You Sick?

If you suffer from allergies or asthma, breathing in mold can aggravate your sickness. Even those who don’t have mold allergies can experience irritating symptoms like itchy eyes, skin, nose, throat, and lungs as a result of mold exposure.

You may experience symptoms in the form of:

  • Shortness of breath
  • Unexplained skin rash
  • Watery eyes
  • Running nose
  • Itchy eyes
  • Cough
  • Red eyes
  • Long-lasting sinusitis

How Can I Get Rid of Black Mold Around Windows?

To get rid of black mold, start by examining the area thoroughly to make sure you’re aware of all existing mold. Vacuum or dry-clean the affected area. Dampen the area, then remove the mold using detergent and a clean cloth. Apply bleach to take care of any invisible mold.

Last but not least, you’ll want to take measures to prevent the mold from recurring. Remember that mold multiplies quickly, so if you miss a spot, you’ll be dealing with black mold again in no time.

Make sure you treat the root of the problem, which may be a leaky window, the accumulation of dust, an overly humid room, or poor ventilation. You can try tactics such as regular dusting, removing house plants, installing exhaust fans, or regularly opening your windows to encourage airflow.

Dealing With Mold in Your Windows? Contact Homespire Today

If you’re noticing the signs or symptoms of mold developing in your window sills, it’s time to call in professional help. Removing mold can be difficult, particularly since it is not always visible to the human eye. If your window is double-paned, you will need an expert to help remove and thoroughly clean the affected area.

Homespire Windows and Doors can provide a solution. With 25 years of home improvement experience, we provide and install high-quality, energy-efficient windows. Moldy windows can lead to rotting wood, not to mention health setbacks.

Give your home a fresh start with brand-new windows. We offer friendly, local service to customers in the Tri-State region, Philadelphia, Central Pennsylvania, Northern Maryland, and beyond. To learn more about Homespire or to request a free window analysis, contact us online or give us a call today.