Dangerous and unsightly, mold in your basement can be a damaging invader. According to the EPA, it just takes a little moisture before naturally-occurring mold spores start their rapid growth. Paired with the low airflow of basements, moisture can cause mold growth easily and potentially damage your health and property.

Getting rid of mold in basement areas can be a daunting task, and it’s hard to know when to call in a professional versus what can be reasonably handled by yourself. This guide will walk you through what you need to know about mold in your basement, the steps and tools to get rid of it, and when you should call in a professional.

How do you get mold in your basement?

Mold is a natural way that the environment breaks down organic debris, and tiny mold spores are present everywhere. When mold spores come into contact with a damp surface, they either begin to grow or try to break down the item that they’re growing on, such as natural fibers and untreated wood.

There are different types of mold, but it’s easy to identify each type once you know their characteristics.

Knowing where to look makes it easy to find. Mold will usually grow when there is moisture from HVAC condensation, pipe leaks, or unsealed basement walls. By checking around your HVAC units, under overhead pipes, and along where basement walls meet the floor, you can usually find where mold has settled and started to grow.

What are the common types of basement mold?

• Cladosporium: Usually brown, but also black or gray, this type of mold is common in soil and organic material throughout the world. This type of mold is relatively slow-growing.
• Penicillium: Used in the development and manufacture of the life-saving antibiotic penicillin, Penicillium is also common throughout the world and is fast-growing and usually green or white.
• Aspergillus: This fungus lives outdoors and indoors, and most people can tolerate it without issue. However, in rare cases, it can cause an infection called Aspergillosis that can be very damaging to people with weakened immune systems or lung problems like asthma.
• Alternaria: Fast-growing and brown, olive, or black, this mold can cause serious infections, but cases are generally rare and accompanied by an underlying condition.
• Stachybochrys chartarum: Also known as toxic black mold, Stachybotrys chartarum is arguably the most common household mold, is black to greenish in color, fast-growing, and notorious for thriving on building materials like drywall, wood, gypsum board, and coverings like wallpaper.

What are the steps to get rid of mold in your basement?

According to the CDC, you cannot completely get rid of mold spores in your basement, but you can remove the source of moisture and remove the mold that has grown from it. The following steps suggested by the CDC and EPA will help you get rid of mold in your basement:

Step 1: Quickly stop the source of moisture to prevent mold from growing further

Depending on the problem, you may have to perform significant repairs to stop the moisture. If it’s a leaky pipe, condensation in your HVAC system, or a crack in a doorway or window, make sure to either repair or have a professional repair it ASAP.

If there is a moisture problem from your basement walls, run a dehumidifier to dry excess humidity.

Step 2: Remove moldy material if possible

If the mold has damaged a small area of soft or fibrous material like carpet, ceiling tiles, or wall material that’s not load-bearing (such as wood studs or cement), you can remove the material yourself and replace it.

Just be sure to wear protective eyewear and disposable dust masks, gloves, and possibly protective clothing so you can ensure you’re not bringing the mold into your living spaces.

Step 3: Clean moldy material that can\’t be replaced

For walls, floors, and other hard surfaces, use a bleach solution (1 cup of bleach per gallon of water) and/or commercial cleaners to wash and kill the mold while wearing the same protective gear mentioned in step two.

Use disposable sponges and other cleaning materials so you can throw them away and keep them from spreading spores to other places in the house.

What are the products and tools needed to get rid of mold in basement areas?

• Dusk mask or respirator: You don’t need a medical-grade mask or a professional reusable respirator, but some sort of mask will protect you from the damaging effects of mold while working around it.

• Eye protection: When disturbing mold spores during cleaning or simply using harsh chemicals like bleach, you’ll want to keep your eyes protected.

• Disposable gloves: Handling mold and moldy material are reason enough to wear gloves, but it can also protect your skin from irritation when using cleaning products.

• Stiff-bristled brush: To effectively remove mold stains on porous or rough surfaces, you will need a brush that can scrub away mold without the bristles collapsing.

• Sponge: On softer or smoother surfaces, a disposable sponge may be all that’s needed to stop mold spots from becoming more significant problems.

• Mold stain remover: Though not essential for actually removing mold, you’ll likely find a dark stain on the material that the mold was growing on and you’ll want a product to remove it. Plus, removing the old stains can make sure that you recognize new mold growth later.

• Bleach: A solution of 1 cup (8 ounces) of bleach to 1 gallon of water is enough to kill mold on surfaces, according to the CDC.

• Cleaning bucket with measuring marks: Ensure the right measurements for your bleach solution with a good cleaning bucket.

• Spray bottles: Whether for bleach or one of the more natural solutions discussed below, a spray bottle will help you treat mold spots.

How to get rid of mold in your basement naturally?

Understandably, some households want to avoid using harsh chemicals in the home to treat mold, especially if it’s a small and manageable amount. Thankfully, there are several natural and less-harsh products to clean mold away.

Vinegar and baking soda are both acidic and can be used to scrub away mold and help kill the spores in its wake. Simply make a half-water, half-vinegar solution, spray on the mold, leave overnight, and come back the next day to scrub with soapy water.

For baking soda, make a paste of 50:50 baking soda and water to use as an abrasive scrub, or mix 2 tablespoons of baking soda with 2 cups of water in a spray bottle and spray the solution on the affected area before scrubbing.