How to Prevent Moisture Damage in Your Storage Unit

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July 1st, 2025

How to Prevent Moisture Damage in Your Storage Unit Tips from Hi-Stack Storage

Taking a few extra steps now can save you time, money, and frustration down the road. Moisture may seem harmless, but in a storage unit, it can lead to mold, mildew, rust, and lasting damage to your valuables. Fortunately, with a few simple precautions, you can keep your items safe and dry year-round. Here are our top tips to prevent moisture damage in your storage unit:

1. Use Moisture Absorbers

Products like the E-150 Eliminator or DampRid are designed to pull moisture from the air. Place one (or more, depending on the size of your unit) in your space and check it regularly. Replace them as needed, especially during humid months.

2. Elevate Items Off the Floor

Even in dry units, condensation can form on the concrete floor. Use wooden pallets or plastic shelving to keep boxes and furniture elevated. This allows airflow and helps prevent direct contact with any unexpected dampness.

3. Use Plastic Bins Instead of Cardboard

Cardboard boxes are vulnerable to absorbing moisture, which can weaken them and lead to mold. Opt for airtight plastic containers for long-term storage—they offer better protection and are reusable.

4. Store Only Clean, Dry Items

Before storing, make sure all items are completely dry—especially fabrics, clothing, appliances, and outdoor gear. Even a small amount of moisture can spread and cause damage over time.

5. Wrap Fragile or Sensitive Items

Wrap items in breathable materials like acid-free paper, bubble wrap, or cotton sheets. Avoid plastic wrap for long-term storage, as it can trap moisture and cause condensation.

6. Visit and Inspect Regularly

Check on your unit every few weeks if possible. Look for signs of dampness, such as musty smells, condensation, or visible mold. Catching an issue early can make all the difference.

7. Report Any Issues Promptly

If you suspect a moisture problem in your unit or notice leaks, inform our management team right away. We’re here to help keep your storage space secure and in good condition.