Key Takeaways
- Clean and completely dry every item before storing it
- Use quality packing materials — avoid cheap trash bags and newspaper
- Label every box on at least two sides with room name and priority level
- Build a floor plan with aisles for access and heavy items at the back
- Check on your unit every two to three months for moisture or pest issues
Long-term storage is different from short-term moving storage. If your belongings will stay in a unit for months — or even a year or more — a few extra packing steps can prevent mold, warping, pests, and broken items. The effort you put in before move-in day directly affects the condition of your belongings when you retrieve them.
Whether you are downsizing, renovating, deployed for work, or simply need to free up space at home, these packing tips will help you protect your investment and make the most of your storage unit.
1. Clean and dry everything before storage
Moisture is one of the most common causes of damage in storage. Wipe down furniture surfaces, wash fabrics, vacuum upholstered pieces, and make sure all items are fully dry before packing them. Even a small amount of trapped moisture can lead to mold or mildew growth over several weeks.
Pay special attention to:
- Kitchen appliances: Clean interiors thoroughly and leave doors slightly ajar to prevent trapped odors and moisture.
- Clothing and linens: Wash and dry completely. Store in breathable containers — not plastic bags, which can trap humidity.
- Outdoor furniture: Hose down, scrub, and allow several hours to air dry before covering.
- Tools and metal items: Wipe down with a light coat of machine oil to prevent rust during extended storage.
Important
Never store food, liquids, or anything with a strong scent in a storage unit. These attract pests and can cause damage to nearby items. Dispose of all perishables, cleaning chemicals, and aerosol cans before moving in.
2. Use the right packing materials
Investing in quality packing supplies is one of the most cost-effective ways to protect your belongings. Here is a breakdown of what to use and when.
| Material | Best For | Why It Matters |
|---|---|---|
| Corrugated boxes (new or sturdy used) | General packing, stacking | Uniform sizes stack safely and resist crushing better than worn boxes |
| Bubble wrap | Fragile items, glass, electronics | Provides cushioning that absorbs shock and prevents scratches |
| Packing paper (unprinted) | Wrapping dishes, filling voids | Ink-free paper prevents staining; crumpled paper fills gaps to prevent shifting |
| Furniture covers (breathable fabric) | Couches, mattresses, chairs | Breathable covers protect from dust without trapping moisture |
| Mattress bags | Mattresses and box springs | Sealed bags prevent stains, dust mites, and moisture during storage |
| Plastic bins with lids | Documents, photos, small valuables | Rigid, stackable, and more water-resistant than cardboard |
Pro Tip
Avoid using newspaper for wrapping — the ink transfers onto surfaces and can permanently stain dishes, glass, and light-colored fabrics. Use clean, unprinted packing paper instead. It costs slightly more but saves you from cleaning or replacing items later.
3. Label by room and priority
Label each box on at least two sides with a clear description of its contents, the room it came from, and a priority level. A simple system works best:
- Priority 1: Items you may need to access first (seasonal clothes, documents, electronics chargers)
- Priority 2: Items you might access occasionally (kitchen extras, guest bedding, hobby supplies)
- Priority 3: Items you will not need until you fully unpack (archived records, collectibles, rarely-used furniture)
Place Priority 1 boxes near the front of the unit and Priority 3 at the back. This saves time and avoids the frustration of digging through a packed unit to find one item.
Consider keeping a master inventory list on your phone or in a notebook. Record each box number and its contents. This small step pays dividends when you need to find something specific months down the road.
4. Build a simple floor plan
Place heavier furniture and boxes along the sides and back, then leave a narrow aisle down the middle if you will need access. Keep fragile items elevated and away from pressure points.
Here is a basic layout strategy that works for most unit sizes:
- Back wall: Largest furniture pieces (couch, dresser, bookshelf) standing upright against the wall
- Side walls: Stacked boxes, heaviest on the bottom, lightest on top
- Center aisle: A walking path about two feet wide running from the door to the back
- Front area: Priority 1 items and anything you may retrieve before the rest
- Top layer: Soft, light items like pillows, blankets, and cushions to fill vertical space
Space Saver
Disassemble furniture when possible. Remove table legs, take apart bed frames, and detach shelving. Store hardware in labeled bags taped to the corresponding furniture piece. This can reclaim 20-30% of floor space in a packed unit.
5. Protect specific item categories
Different items need different care. Here are targeted tips for the most commonly stored belongings:
- Mattresses: Store standing on their side in a sealed mattress bag. Do not lay flat for long periods — this can cause permanent impressions and sagging.
- Electronics: If you have original boxes, use them. Otherwise, wrap in anti-static bubble wrap and pack in sturdy boxes with foam inserts. Remove batteries to prevent corrosion.
- Books and documents: Pack flat in small boxes to avoid spine damage. Do not overfill — heavy book boxes are difficult to carry and can crush items below them.
- Clothing: Hanging items go in wardrobe boxes. Folded items go in plastic bins or vacuum-seal bags (for seasonal storage). Avoid regular cardboard boxes for clothing unless items are wrapped in acid-free tissue.
6. Check in periodically
If possible, inspect your unit every two to three months. A quick visit helps you confirm everything is dry, stable, and organized. Look for signs of moisture (condensation on walls, musty smell), pest activity (droppings, chew marks), or shifting items.
If you notice any issues early, you can address them before they cause significant damage. Most problems in storage are preventable — they just need to be caught in time.
Choosing the right unit for long-term storage
Your packing strategy and unit choice go hand in hand. For long-term storage of sensitive items, a climate-controlled unit is often worth the investment. For help with sizing, check our unit size guide.
Need help choosing a unit size before packing? Review our size comparison page and then contact our team if you want help comparing options at a specific facility.
Frequently Asked Questions
How often should I check on my storage unit?
We recommend visiting your unit at least once every two to three months. This allows you to catch moisture issues, pest problems, or shifting items before they cause significant damage. Mark a recurring reminder on your calendar so you do not forget.
Can I store a mattress on its side?
Yes — in fact, storing a mattress on its side in a sealed mattress bag is the recommended approach for long-term storage. Laying a mattress flat for extended periods can cause permanent body impressions and sagging, especially with memory foam and pillow-top mattresses.
How do I prevent pests in my storage unit?
Never store food, scented items, or liquids. Use sealed plastic bins instead of cardboard when possible. Place pest deterrents (cedar blocks or mothballs in breathable pouches) near fabric items. Clean all items before storing and inspect during periodic visits.
Should I use vacuum-seal bags for clothing?
Vacuum-seal bags work well for seasonal clothing and bedding — they reduce volume dramatically and protect against dust and pests. However, avoid using them for delicate fabrics, leather, or items with structure (like suit jackets), as prolonged compression can cause permanent creasing.