Prepare Your Mattress Before Moving It

The first step is to clean your mattress thoroughly and let it dry completely. Vacuum both sides with an upholstery attachment to remove dust, dead skin cells, and debris that can attract pests or cause odors during storage. If there are stains, spot-clean them with a mild detergent solution and allow at least 24 hours for the mattress to dry fully before wrapping. A damp mattress stored in an enclosed space will develop mold and mildew, which can make it unusable.

Once dry, inspect the mattress for any damage—tears, holes, or weak seams. Small holes can be patched with fabric glue and a matching patch before storage, but large damage should be noted so you know what to expect when you retrieve it. This is also the time to measure your mattress and note its dimensions, which will help you plan how to position it in your unit and determine if you have room for other items around it.

Key Takeaways

  • Clean and completely dry your mattress before wrapping it, as moisture trapped inside will cause mold and mildew.
  • Wrap the mattress in a plastic mattress bag or heavy plastic sheeting, sealed with packing tape, to protect it from dust and pests.
  • Store the mattress flat on a wooden pallet or frame, never on the floor directly, to allow air circulation underneath and prevent moisture absorption.
  • Keep the storage unit climate-controlled if possible, or may support good ventilation by cracking the door slightly if the unit is uncontrolled.
  • Do not stack heavy items on top of the mattress, as this compresses the foam or springs and can permanently damage the structure.

Wrap and Seal the Mattress Properly

Use a plastic mattress bag designed for storage, which you can find at moving supply stores or online. These bags are thick enough to block dust and pests but still allow some air circulation. Slide the mattress into the bag carefully—you may need help, as a queen or king mattress is awkward to maneuver. Once the mattress is fully inside, seal the bag with packing tape along all seams and openings. Pay special attention to the bottom and sides where the seal can come loose.

If you cannot find a mattress bag, heavy plastic sheeting (at least 4 mil thickness) works as a substitute. Wrap the mattress completely, overlapping the plastic by at least 6 inches on all sides, and tape every seam with packing tape. Do not use thin plastic bags or garbage bags—they tear easily and offer no real protection. The goal is a complete barrier between the mattress and the storage environment.

Position the Mattress on a Raised Base

Never place a mattress directly on the floor of a storage unit. Concrete floors absorb moisture from the ground, especially in units without climate control, and this moisture will seep into the mattress from below. Instead, place the mattress on a wooden pallet, wooden bed frame, or wooden shelving unit that sits at least a few inches above the floor. This gap allows air to circulate underneath and prevents the mattress from absorbing ground moisture.

If you are storing a box spring along with the mattress, place the box spring on the pallet first, then the mattress on top of it. Store the mattress flat, never on its side or at an angle. Storing it upright or at an angle can damage the internal structure, especially if the mattress is made of foam or has a pillow top. Flat storage distributes the weight evenly and keeps the mattress in the same shape it was in when you stored it.

Control Temperature and Humidity in Your Unit

Extreme temperature swings and high humidity are the main enemies of stored mattresses. If your storage facility offers climate-controlled units, this is worth the extra cost for long-term mattress storage. Climate control keeps the temperature between 55 and 85 degrees Fahrenheit and humidity below 50 percent, which prevents mold, mildew, and material breakdown. Without climate control, temperature and humidity fluctuate with the seasons, and in humid climates or during rainy months, moisture can accumulate inside the plastic wrapping.

If you are using an uncontrolled unit, improve air circulation by cracking the door open slightly—just enough to allow a small gap of airflow, but not so much that pests can enter. Some storage facilities allow this; others do not, so check your lease. You can also place desiccant packets or a small dehumidifier inside the unit to absorb excess moisture. Check on the mattress every few months if possible, opening the door to let fresh air circulate around it.

Avoid Stacking and Protect Against Pests

Do not stack boxes, furniture, or other items on top of the mattress. The weight compresses the foam or springs and can create permanent indentations or structural damage that makes the mattress uncomfortable or unusable. If you need to store other items in the same unit, arrange them beside the mattress or on shelves above it, leaving at least a foot of clearance on all sides so air can flow around the wrapped mattress.

Pests—mice, insects, and other rodents—are attracted to the dust and organic material inside a mattress. The plastic wrapping helps, but you can add extra protection by placing pest deterrent packets or traps around the mattress (not on top of it). Cedar blocks or mothballs placed near the mattress, not touching it, can also discourage pests. Check your storage facility's rules about what pest control methods are allowed, as some facilities prohibit certain chemicals.

Document Your Mattress Before Storage

Take photos of the mattress before wrapping it—front, back, and sides—so you have a record of its condition. Write down the mattress brand, size, age, and any damage or stains on a label and tape it to the outside of the plastic wrapping. This information helps you remember what you stored and makes it easier to spot any new damage when you retrieve it. If you are storing the mattress for insurance purposes or as part of a move, these photos and notes are useful documentation.

Keep a straightforward inventory list of what is in your storage unit, including the mattress. If you store multiple items, this list helps you locate things quickly without opening boxes or moving items around unnecessarily. Store a copy of this list at home or in your phone so you can reference it without visiting the unit.

Retrieve and Inspect Your Mattress

When you are ready to remove the mattress from storage, inspect it before bringing it into your home. Check the plastic wrapping for tears or signs of pest activity. Open the wrapping in the storage unit or outside, not in your bedroom, so any dust or debris stays out of your living space. If the mattress smells musty, let it air out in sunlight for a few hours before using it. Sunlight naturally kills odor-causing bacteria and helps dry out any residual moisture.

If you notice mold, mildew, or pest damage, do not bring the mattress into your home. These problems spread to other furniture and bedding. In most cases, a mattress with mold or significant pest damage should be discarded. Minor surface dust can be vacuumed off, and light odors fade with airing out, but structural or biological damage is not worth the risk.

Frequently Asked Questions

How long can you store a mattress in a storage unit?

A mattress can be stored for several months to a few years if it is kept clean, dry, and protected from pests. The longer it sits, the greater the risk of mold, odor, or pest damage, especially in uncontrolled units. Most people store mattresses for 6 to 12 months without problems if they follow proper wrapping and ventilation steps.

Should I use a mattress bag or plastic sheeting?

A mattress bag designed for storage is the better choice because it is thicker and more durable than plastic sheeting. However, heavy plastic sheeting (4 mil or thicker) works if you seal it carefully with packing tape. Avoid thin plastic or garbage bags, which tear easily and do not protect the mattress.

Can I store a mattress on its side to save space?

No. Storing a mattress on its side or at an angle can damage the internal springs or foam structure, especially over months of storage. Always store it flat. If space is tight, consider storing the mattress in a climate-controlled unit or removing it from storage sooner rather than keeping it in a cramped position.

What if my storage unit is not climate-controlled?

Uncontrolled units work for mattress storage if you take extra precautions: wrap the mattress in heavy plastic, place it on a wooden pallet, crack the door slightly for air circulation, and use desiccant packets to absorb moisture. Check on the mattress every few months. Climate-controlled storage is safer for long-term storage, but uncontrolled units are acceptable for shorter periods if you monitor conditions.

Do I need to use mothballs or cedar blocks?

Mothballs and cedar blocks are optional but helpful for pest prevention. Place them near the mattress, not touching it directly. Check your storage facility's rules first, as some facilities restrict certain chemicals. Pest deterrent packets are a safer alternative if mothballs are not allowed.