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How To Make Memory Foam Mattress Expand Faster?

Memory foam is reminiscent of relaxing sleep like in the clouds. This type of mattress is popular because it also helps to improve sleep disorders because of its excellent structure. However, a common problem that you will likely encounter is that it does not expand as you expect.

So, how to help your memory foam mattress expand faster? Let’s look at this article to discover the potential causes and get some helpful tricks. Scroll down!

What To Do To Make Memory Foam Mattress Expand Faster?

If your memory foam hasn’t expanded after waiting the required amount of time, you may speed up the process by following the in-depth instructions outlined in this guideline below:

Step 1: Put The Foam Mattress On A Flat Floor

You’ll be able to begin the expansion process sooner if you unbox it as soon as possible. Keeping a bed in a box for a lengthy period may cause it to take longer to recover. If you cannot open it right away, you should perform this task within 72 hours of getting it.

If your bed has a box spring or bed frame, this surface will not even be enough for the foam. You should place it on a flat floor within 24 hours.

After that, set it flat on the ground and make sure it unfolds. In this way, the expansion process will automatically start. If you maintain it flat, it will be more exposed to air and expand fast and evenly in all foam mattress corners.

Step 2. Adjust The Temperature In Your Room

Memory foam is heat-sensitive. Cooler temperatures may produce constriction, whereas warm conditions encourage expansion. If your new memory foam bed doesn’t expand fully, the first step is to warm up the space where you’ll be placing it.

By improving the warmth, you can make air pockets softer and more flexible, reducing the density and increasing the product’s fluidity.

If your environment is chilly or you purchase modern memory foam mattresses in the cold months, you may need the help of a heater to warm up your room. However, placing your heater near the new mattress is not a perfect idea because various goods react differently to heat.

The ideal room temperature for expansion is not under 68 degrees Fahrenheit and not over 75 degrees Fahrenheit. To make sure, you may also look at the manufacturer’s specifications to see how much heat your mattress can withstand.

Read more: Linenspa Mattress Review

Step 3: Roll It On

Apart from the heat, movement can affect the expansion time of your mattress, allowing it to inflate more easily. So, during the first 30 minutes after unboxing, mild movement will encourage microscopic air pockets to open, speeding up the expansion process.

Keep in mind that the body heat contributes to the expansion of the memory foam mattress, so switch positions frequently to allow it to inflate as much as possible.

It would be best to roll it on regularly until it completely expands because mattress corners may be harder and flatter than the center part.

Nevertheless, standing on the mattress to produce body heat is not advisable because this action will cause deep recesses and notches on your product.

Step 4: Offer It More Air Circulation

A foam mattress requires enough air circulation that allows it to spread much more quickly, reducing the amount of time you have to wait. Turning on a fan is a common option, as fans provide active air ventilation and movement.

You may make things easy for yourself by using a fan heater to provide both heat and air movement. Remember not to put the fan heater too close to the mattress to avoid damaging it. 

A steamer is another wonderful option to enhance air circulation. It allows you to boost the mattress’s heat while simultaneously increasing air circulation.

Read more: Best Daybed Mattresses

How Long Does A Memory Foam Expand Fully?

As shared earlier, a memory foam bed takes around 24 hours to expand thoroughly. Once you take the product out of the box, which pushes the air out of the mattress during compression, begin loading open-cell composition again.

As air fills this product structure, its viscoelasticity enables it to return to its previous shape.

Nevertheless, you should be aware that the time for your mattress to expand may vary, depending on the different types. Besides, there are some primary factors involved in expansion time, as shown below:

  • Temperature: These products are temperature sensitive. In a hotter environment, any mattress topper expands more quickly. Heat lowers a material’s stiffness and enhances its fluidity, making it simpler to shape.
  • Thickness: The memory foam mattress thickness likewise impacts their expansion time. Thin products will take less time to inflate compared to thick ones. If you have thick foam layers, you might consider cutting them.
  • Density: Memory foam comes in a variety of densities from various manufacturers. The expansion of a denser foam takes longer. The density of a foam determines how stiff it is.

Why Is Memory Foam Mattress Not Expanding?

It would help if you first determined what is causing your mattress not to expand correctly before you can remedy it. We’ve put up a list of the most potential reasons new foam mattress owners experience problems.

Your Mattress Requires More Time To Expand

When receiving the package, you may be too excited to use the mattress right away without checking the instructions for use and maintenance. Lack of patience is the main cause of your memory foam mattresses not having sufficient time to work correctly!

If you open the box and find your mattress smushed or thin, don’t stress or feel disappointed. That’s because it requires a certain amount of time to be as big as you expect.

Typically, a mattress may need around 24 hours to increase in size completely. However, this instruction doesn’t mean it’s faulty if it’s still flattened after this amount of time.

The expanding process may take longer than expected, but this phenomenon is normal. You should give it about 72 hours so that it can get perfectly inflated.

You Leave It In The Box For A Long Time

By leaving the mattress stuck in the box for weeks or months, foam pockets will appear and slow memory foam expansion more than usual. That’s because these foam pockets cause the mattress to grow tougher and its fibers to become trapped within; the mattress can’t become distended fully.

You Put It In Improper Ambient Temperature

Another culprit is the temperature of the environment you place; it is not suitable for a memory foam mattress. The essence of the foam mattress is to absorb heat to fit your body shape.

Probably, your new one hasn’t gotten enough warmth to heat up yet. As a result, you must ensure that your space is warm enough.

If your room is too cold, it’s better to take it to another environment where it can trap the heat it requires to become warmer.

The Room You Put It In Is Too Humid

Another reason that a memory foam mattress doesn’t expand ​is because of the humidity in your environment. Despite being extremely porous, it won’t be good at absorbing much humidity.

Therefore, it would be best to reduce the humidity in your house or the space where you lay the mattress.

There are a variety of options for lowering humidity levels. Setting your air conditioner to dry mode is one solution or using air purifiers is another great idea.

It Is The Manufacturer’s Fault

If none of the factors listed in this article apply to your situation, your mattress is likely faulty, you can do nothing to fix it except for contacting the manufacturer for a return or exchange.

In case you bought the mattress a long time ago but have only lately used it, it is most likely no longer covered by the manufacturer’s guarantee. As a result, make sure to check the warranty coverage right when it’s out of the box. So, if it breaks down, you can have it fixed or replaced quickly.

You should still call the manufacturer’s customer service to see what options for resolving the issue. Nonetheless, if your mattress toppers have reached the end of their useful life, you will have no choice but to replace them.

Read more: Best Mattress Without Memory Foam


This article has ultimately got to the end of your question. Overall, it would be best if you unboxed it right away after purchasing, placed it on a flat surface, and provided more warmth and air circulation to promote expansion times.


Can I Sleep On A Memory Foam Mattress While It’s Expanding?

The answer is yes. You can sleep or roll on the memory foam mattress even if it doesn’t fully expand. Your body temperature is a good way to speed up expansion time.

Does Heat Help Memory Foam Mattresses Expand?

Yes. The memory foam mattress is heat sensitive, which means it responds well to the warmth to expand faster. That’s why fan heaters are useful for full expansion.

Why Is My Memory Foam Mattress So Hard?

The culprit may be the cool temperature. When the product gets cool, it will become harder and less elastic. Remember to bring heat to your room if you have unexpanded foam.

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David Elkie

David Elkie

David Elkie is the CEO at Banner Mattress. He has been in the writing and editing business for the mattress, bedding accessories and décor industries for over 20 years.