How to store a mattress: the simple way to keep it brand new

I once tried to shove an expensive guest mattress into a damp garage without any cover and let me tell you, I regretted it within a month. If you are wondering how to store a mattress properly so it stays fresh and usable, you need a plan that goes beyond just leaning it against a cold wall.

To store a mattress correctly, you must clean it thoroughly, wrap it in a heavy duty plastic mattress bag, and lay it flat in a climate controlled environment. Avoid storing it on its side for long periods, as this causes internal springs or foam layers to shift and sag over time.

Start with a deep clean

I learned the hard way that any moisture or skin cells left on the fabric will turn into a science project if left in a dark storage unit. Before you even think about moving it, grab your vacuum. Use the upholstery attachment to get into every stitch and seam. I found that spending an extra ten minutes here saves a lot of headache later.

I usually sprinkle some baking soda over the entire surface and let it sit for about half an hour. It smells a bit like a bakery for a minute, but it really pulls out those hidden odours. After you vacuum the soda up, make sure the mattress is bone dry. If you just cleaned a stain with water, wait at least twenty four hours before wrapping it up. Even a tiny bit of dampness leads to mould growth once it is sealed in plastic.

Wrap it up tight

You need a proper mattress bag for this. Do not try to use thin cling film or old blankets. I tried using a cheap thin bag once and it caught on a door frame and ripped instantly. Get a thick, heavy duty plastic bag designed for moving. These are usually available at storage centres or online shops.

Once the mattress is inside, use packing tape to seal the opening completely. You want it to be airtight. This keeps out dust, spiders, and moisture. If you are storing a memory foam mattress, this step is even more vital because foam acts like a giant sponge for any smells in the air.

The flat vs upright debate

This is where most people go wrong. It is very tempting to stand a mattress on its side to save space. I did this with a pocketed spring mattress and after three months, the springs had actually shifted towards the bottom. It felt like sleeping on a hill. Always store a mattress flat. If you must stand it up to move it, that is fine, but for long term storage, it needs to be in its natural horizontal position.

Storage position comparison

Storage Method	Pros	Cons
Flat (Horizontal)	Protects internal structure, prevents sagging, keeps layers aligned.	Takes up a lot of floor space.
On Side (Vertical)	Saves space in small units.	Damages springs, causes foam to shift, ruins the shape.

Where to keep your mattress

Environment is everything. A garage or an unheated shed is usually a bad idea. Temperature swings cause condensation inside the plastic bag. I prefer a climate controlled storage unit where the temperature and humidity stay steady. If you are keeping it at home, a spare room or a finished basement works well.

Never put the mattress directly on a concrete floor. Concrete can wick moisture upwards. I usually lay down some wooden pallets or a layer of thick cardboard first. This allows a bit of air to move underneath and keeps the plastic off the cold ground.

What to avoid when storing bedding

I have made plenty of mistakes, so you don’t have to. Here are the big ones to watch out for:

• Stacking heavy items on top: Do not use your mattress as a shelf for heavy boxes. This creates permanent indentations in the foam or weakens the springs.
• Using thin plastic: As I mentioned, thin bags rip. A rip means bugs and dust get in.
• Storing it while damp: This is the fastest way to ruin a bed. If it feels even slightly cool to the touch, it might still be damp.
• Leaving it in the sun: If you are airing it out before storage, keep it out of direct sunlight for long periods as UV rays can degrade certain foam types.

Who this guide is for

This advice is for anyone moving house, putting items into long term storage, or saving a guest bed for future use. It applies to memory foam, innerspring, and hybrid models. However, if you have a very old, cheap mattress that is already sagging, it might not be worth the cost of a storage unit. Sometimes it is better to donate or recycle it rather than paying to keep it in a box for a year.

Frequently Asked Questions (FAQs)

Can I store a mattress in a garage?

I would not recommend it unless the garage is fully finished and dry. Typical garages have too much moisture and temperature change. This leads to mould and a musty smell that is almost impossible to get out later.

How long can a mattress stay on its side?

You can keep it on its side for a day or two while moving. If you leave it that way for weeks, the internal components will start to settle and lose their shape. I noticed a difference in support after just a month of side storage.

Should I take the mattress out of the bag occasionally?

No, keep it sealed. Opening the bag just lets in moisture and dust. As long as it was dry when you put it in, it will stay fresh inside the plastic seal.

Do memory foam mattresses need special care?

Yes, memory foam is very sensitive to weight. Never put anything on top of a stored foam mattress. It also reacts more to cold temperatures, so it might feel very hard when you first take it out of storage.

How do I freshen it up after storage?

When you finally take it out, let it breathe for a few hours before putting sheets on. I like to sprinkle a little more baking soda, vacuum it off, and then let it air out near an open window to get rid of that “plastic” smell.

Wrapping it all up

Storing a bed doesn’t have to be a nightmare if you follow these steps. Just remember to keep it clean, keep it dry, and for the love of your back, keep it flat. Taking these extra steps ensures that when you finally pull it out of storage, it actually feels like a bed and not a lumpy mess. Knowing how to store a mattress properly will save you a lot of money and ensure you get a good night’s sleep in the future.