How to Detect Mold in Your Garage

Mold in your home can lead to potential health issues for your family and possible structural damage to the home in some cases. Mold can also be problematic in garages as well due to a lack of ventilation and water brought in by the home’s inhabitants and cars in rain or snowy weather. Being able to identify mold in your garage is a necessary step to keep everyone safe and healthy.

Mold on Concrete Floors

Mold does not typically grow on concrete, but concrete garage floors can be at risk. The problem arises when water is brought in from cars or people. When the water drains, it often leaves mineral deposits behind in the form of dark spots on the ground. Mineral deposits are commonly mistaken for mold; however, these spots on their own are not an issue. The downside is that a mineral deposit can be a perfect place for mold to form later on. Check the spot periodically and see if it gets bigger or darker because these occurrences can signify mold growth.

Moldy Drywall

Mold on your drywall can be a real issue, as it can compromise the structural integrity of the wall itself. Check your walls occasionally to see if they are deteriorating or discolored. Damaged spots or dark spots, much like the floor, can be signs of a mold infestation. Another symptom that you have mold is a distinct, musty smell in the room. Remember, if your ceiling is also drywall then the same symptoms apply to finding mold overhead.


If a garage wall is something other than drywall, again check for a distinct smell or dark spots. Unlike porous drywall which will often require certain places to be cut out and replaced, a smooth wall surface lends itself to easier mold removal. Many times, a wet rag will do the trick, but if that fails some bleach or vinegar can do the trick depending on the type of mold.

READ MORE: How to Reduce the Humidity in Your Garage

Mold Prevention

Mold is a common issue in many homes, so it is probable you will have to deal with it at some point. Luckily, some steps can be taken to reduce the desirability of your home for mold particles. The first is to keep the area dry by having proper drainage so water can make it back outside, and door weather-stripping to prevent moisture from entering in the first place. Ventilation is also important to keep mold at bay, as mold thrives in high humidity. For this reason, installing dehumidifiers in the garage is also recommended.