What Are the Risks of Mold Growing on Belongings in Storage?
Last updated October 25, 2026
The short answer
Damage to Your Items
Mold eats organic materials like wood, paper, fabric, and leather. It can stain clothing, warp books, and rot furniture, making them unsalvageable. Even non-porous items like plastic can hold mold spores that are hard to remove completely.
The longer mold sits, the deeper it penetrates. A small patch on a cardboard box can spread to everything nearby. You might not notice until the damage is severe, especially in a dark storage unit where you visit rarely.
Health Risks
Mold spores become airborne and can be inhaled. For some people, this triggers sneezing, coughing, or itchy eyes. For others, especially those with asthma or allergies, exposure can be more serious, leading to respiratory trouble or infections.
If you or a family member feel unwell after being near moldy belongings, see a doctor. Pregnant women, children, the elderly, and people with weakened immune systems are at higher risk. Keep the area ventilated and wear a mask if you handle moldy items.
- Runny nose or congestion
- Wheezing or shortness of breath
- Skin irritation or rashes
- Headaches or fatigue
- Worsening of existing conditions
Spread to Other Items
Mold spreads through tiny spores that float in the air. Once one item is infected, spores can settle on nearby boxes, clothes, and furniture. Your entire storage unit can become contaminated within weeks, even if the original source is small.
You might bring mold home on items you retrieve, infecting your living space. That is why it is important to check everything before moving it out of storage. If you see or smell mold, isolate those items to prevent further spread.
Steps to Protect Your Belongings
Check your storage unit regularly, especially after weather changes. Look for discoloration, musty smells, or dampness. Use dehumidifiers or moisture absorbers to keep the air dry. Store items in airtight plastic bins instead of cardboard boxes.
If you find mold, remove affected items and clean them with a mild detergent and water. For porous items, you may need to discard them. For extensive mold, consider professional help. Local water damage pros can handle structural drying and dehumidification to reduce moisture in the unit.
- Use plastic bins with tight lids
- Place items off the floor on pallets
- Keep unit ventilated if possible
- Check for leaks after heavy rain
- Clean spills immediately
Water damage does not wait
Phones are answered 24/7 for Detroit and nearby communities.
Call Now (313) 766-2970Frequently asked questions
Can moldy belongings be saved?
Some items can be saved if you act fast. Non-porous items like glass or plastic can be cleaned with bleach or vinegar. Fabrics may be washable in hot water, but porous items like books or upholstery often hold mold deep inside and may need to be thrown away.
How does mold get into storage units?
Mold enters through tiny spores in the air, which land on surfaces. It grows when there is moisture, warmth, and a food source like wood or paper. Humidity, leaks, or items stored damp can all introduce mold into a unit.
Should I clean mold myself or hire a professional?
You can clean small patches with basic supplies, but large areas or health concerns may require professional help. Water damage pros have equipment to dry out the space and remove mold safely. If you have respiratory issues, let a professional handle it.