How to Store a Mattress the Right Way (So It Lasts)
Storing a mattress sounds simple: wrap it, stash it, done. But a mattress that is stored the wrong way can come out of storage saggy, moldy, or permanently misshapen. The good news is that keeping a mattress in great condition comes down to a handful of rules about moisture, position, and support. Here is how to store a mattress so it sleeps just as well when you bring it back.
Step 1: Clean and Dry the Mattress First
Never store a mattress dirty. Body oils, dust, and any hint of moisture can turn into odor, mildew, or mold while it sits. Vacuum both sides, spot-clean any stains with a mild solution, and then let the mattress air out and dry completely for several hours before you wrap it. Trapping even slight dampness inside a sealed cover is one of the fastest ways to ruin a mattress in storage.
Step 2: Wrap It in a Breathable Cover
Use a proper mattress storage bag rather than sealing it in thick, airtight plastic for months. A breathable cover keeps out dust and pests while still letting a little air move, which prevents condensation from building up inside. If you only have plastic, avoid wrapping it so tightly that moisture gets locked in, and check on it periodically. Secure the cover with tape on the bag itself, never directly on the mattress fabric.
Step 3: Store It Flat If You Can
The ideal way to store a mattress is lying flat, the same way you sleep on it. Flat storage keeps the coils, foam layers, and edges evenly supported so nothing shifts or compresses out of shape. Lay it on a clean, raised surface such as a wooden platform or pallet rather than directly on a concrete floor, which can wick up moisture.
Can You Store a Mattress Against a Wall or on Its Side?
Standing a mattress upright against a wall is fine for a short period, such as during a room rearrange or a quick move, and our guide on how to move a mattress covers that handling in detail. For long-term storage, though, upright is not ideal. Over weeks and months, gravity pulls the internal materials downward, which can cause the coils or foam to settle unevenly and create lumps or sagging. If space forces you to stand it up, prop it evenly against a flat wall, avoid leaning it at a sharp angle, and lay it flat again as soon as possible.
Storing a Mattress in a Garage or Storage Unit
Garages and storage units are common choices, but they come with a moisture and temperature warning. In the Los Angeles area, a garage can swing from cool and damp to very hot, and heat plus humidity is hard on foam and adhesives. Whenever possible, choose a climate-controlled storage unit for anything longer than a few weeks. Keep the mattress off the floor, away from exterior walls, and covered. Do not stack heavy boxes or furniture on top of it, since concentrated weight will compress the surface and can leave permanent dents.
Long-Term Storage Tips
For storage that stretches into months, check on the mattress occasionally. Make sure the cover is intact, there is no sign of moisture or pests, and nothing has been piled on top. Memory foam and latex are especially sensitive to prolonged pressure and heat, so flat, cool, climate-controlled storage matters most for those. When you take the mattress out, unwrap it, let it air out, and give foam models a few hours to breathe and regain their loft before use. If the surface feels a little firm or flat afterward, a fresh mattress topper can restore comfort quickly.
When It Is Not Worth Storing
If a mattress is already sagging, stained, or near the end of its life, storing it may not be worth the space. It is often smarter to replace it and have the new one delivered when you are ready. LA Mattress Store offers free delivery across Los Angeles from our five showrooms, so you can time a new mattress to arrive exactly when your room or move is ready.
Frequently Asked Questions
How do you store a mattress long term?
Clean and fully dry the mattress, wrap it in a breathable storage bag, and store it flat on a raised surface in a cool, climate-controlled space. Keep it off the floor, avoid stacking anything on top, and check on it periodically for moisture or pests.
Can you store a mattress against a wall?
Standing a mattress upright against a wall is fine for a short time, but not for long-term storage. Over weeks and months, the internal coils or foam can settle unevenly and cause sagging. If you must store it upright, keep it flat against the wall and lay it down again as soon as you can.
How do you store a mattress in a garage?
Keep it off the concrete on a pallet or platform, wrap it in a breathable cover, and place it away from exterior walls. Because garages get hot and humid, this is best only for short-term storage. For longer periods, a climate-controlled unit protects the mattress much better.
How do you store a memory foam mattress?
Store memory foam flat, never folded, and keep it in a cool, dry place since heat and pressure can distort the foam. Use a breathable cover and avoid placing anything heavy on top. When you retrieve it, let it air out and expand for a few hours before sleeping on it.
How long can a mattress stay in storage?
A quality mattress can be stored for several months to a year or more if it is kept clean, dry, flat, and in a climate-controlled space. The main enemies are moisture, heat, and pressure, so the better you control those, the longer it stays in good shape.
Store It Right, Sleep on It Later
Good mattress storage is really about three things: keep it clean and dry, keep it flat, and keep it out of extreme heat and humidity. If your mattress has seen better days, it may be time for an upgrade instead. Take our sleep quiz to find the right replacement, and let LA Mattress Store deliver it whenever you are ready.
