15 Effective Tips For How to Fix Mattress Sagging (Important ! )

Mattresses can sag for a number of reasons. Material inside the bed may settle or deform. The material could wear out. It might sag because it lacks adequate support. Let’s look at few ways you can fix mattress sagging, no matter what the cause may be. We’ll also share a few tips on how to prevent your future mattresses from sagging.

10 Tips How to Fix Mattress Sagging

01.Put The Mattress On an Even Surface

Before you assume the problem is the bed, change the support structure. Remove the bed frame and get a bed platform. Or simply lay the bed on the floor. Does it still have those sags in the middle? Then you know that the issue is the bed itself and not the support underneath it.

02.Replace the Box Spring

You may need to replace a damaged box spring. Fortunately, these are typically cheaper than a new mattress.

If your mattress is on a bed frame with wooden slats, the solution may be rearranging the slats. You might need to replace broken slats or install additional slats to create a more even bed surface.

Note that you can also get a bed that seems to sag because the bed frame or support doesn’t fit the mattress. In this case, if you want to know how to fix mattress sagging, start by checking dimensions.

If the bed is half an inch or more beyond the edge of the support, it will tend to sag there. Note that this is one reason why you don’t want a mattress that doesn’t match the box spring or bed foundation, but a mattress that’s slightly smaller than the support isn’t a problem .

03.Create an Equivalent Support

What if you don’t have the money for a new supporting structure? Take the measurements of your bed. Then get plywood sheets and cut them to those dimensions. You can lay these on box spring or bed frame to provide the support you need. You’ll want to put a plastic sheet on top of the wood before you lay the mattress on top of it, because you don’t want it to swell from moisture retention. (That could be due to children having accidents.)

04. Fill In the Uneven Parts

If the mattress surface is still uneven, you need to find out why it is uneven. If it isn’t one of the other factors on this list, then a thick memory foam mattress topper could fill in the low spots. A fiber filled mattress topper will only make up for the degradation of a soft foam surface.

05. Dry Things Out

A mattress may become uneven because the memory foam has acted like a sponge. The problem could be due to a pet or child repeatedly wetting the area. Or you may sweat at night far more than you would like to admit. There may be a serious humidity differential.

For example, if there is a water leak in the wall or floor that is being absorbed by one side of the bed, you’ll get one side swollen up and the other much lower. The odds of humidity or water being the problem are much higher if your bed or bedroom has a mold problem. It is a near certainty if the bedroom has recently flooded.

06. Dry Out the Bed

The solution is to dry out the bed. Remove the covers and let it air out. Remove the bed itself from a given area, if letting it air out and not sleeping on it for several days doesn’t solve the problem. Or it may be as simple as relocating your humidifier or fixing the moisture buildup in the nearby air vents.

07. Prevent It From Getting to Humid Again

Once the bed has dried and returned to normal size, you’ll want to prevent this from happening again. Solutions range from a plastic bed cover to a bed frame that lifts it off the floor. However, if there is still mold growing in the bed, you need to replace it entirely.

08. Admit The Bed is Showing Its Age

Memory foam beds may settle as they’re subject to heavy loads. However, the foam itself can disintegrate over time. You can’t fix this. However, you can extend the life of the bed.

09. Get a Mattress Topper

One solution to make up for a deteriorating bed is by adding a memory foam topper or other mattress topper. This is a viable option if the sagging is minimal. That won’t solve the problem if you’re sleeping in a literal rut. If you want to know how to fix mattress sagging in this case, you’re either going to need to break out a board to lift that portion of the bed or go shopping for a new bed.

10. Fill in the Sagging Areas

If you have a very deep rut in the bed, you can try to fill it with pillows. The pillows should be placed under the mattress at the low spots. This will help lift up the mattress in those low spots without affecting the mattress’ level of support very much.

You will want to use pillows with a similar consistency to the mattress. For example, if you have a very soft memory foam mattress, you’ll want to use soft pillows. You could even use shredded memory foam pillows in this case. If you have a firm mattress, you’ll need to find firm pillows that will lift up the sagging area while maintaining the same feel. You may have to do some trial and error to make sure the pillows are in the right place.

11.Try an Under-Mattress

Another possible solution is adding a supportive foam under-mattress under the mattress. These products may be called mattress helpers. This mattress helper should be located between the mattress and the box spring. It will offset the degree to which the mattress is sagging, and it will prevent you from sinking down to the hard box spring. Note that you can do this with a sagging mattress on a bed platform or the floor, too. This approach is ideal if nearly the entire bed is sagging.

How to Prevent Your Next Mattress from Sagging

At some point, you can’t make up for the deterioration of the bed. Then the only solution is to replace it. Fortunately, there are ways you can prevent the next bed from sagging before its time.

01.Get a Good Bed Next Time

Buy a mattress that doesn’t sag or settle within the first year or two of use. This is a problem with beds with weak memory foam or poor quality metal springs. If you often sit on the side of the bed, then a mattress with good edge support is essential.

02. Support It

Have good support under the mattress, no matter what kind it is. This could take the form of a solid bed platform, a box spring foundation as large as the bed, or a bed frame that doesn’t have gaps the mattress can sink down between.You can help prevent a new mattress from sagging with a little preventative effort. Check the slats in the bed frame to make sure they are intact and in the same place. Make sure the bed frame is not bent or curved. That’s a more common problem with metal bed frame.

03.Prevent Excessive Wear

Rotate the mattress to minimize wear. While spring mattresses can be flipped over to minimize wear, this isn’t an option with most memory foam mattresses. In most memory foam mattresses, you’ll either put the delicate foam layer on the flower or switch to the softer/firmer side of the hybrid mattress. In these cases, you’ll want to rotate the bed 180 degrees. If you sleep in your standard location on the rotated bed, it is still altering the wear pattern on the bed. This can slow the rate of mattress sagging.

Another option is changing your sleeping position. Sleep on the sides as well as the center of the bed to reduce the load on the springs or foam.

Misuse of the bed will accelerate its wear and tear. For example, children jumping on a bed will wear it out. You can hear the stress every time the springs squeak as they land. They will likewise damage memory foam mattresses. The solution is to prohibit the kids from jumping on the bed.

It may also take the form of telling people not to stand on the bed, because that weight will break down the material faster. You may want to get a chair to sit on as you get ready in the morning instead of sitting on the side of the bed.

04.Protect the Mattress

If you can, put a mattress protector on your new mattress. This will prevent it from being stained with spilled juice or urine, and it prevents the mattress from swelling because it is absorbing your sweat. That can contribute to mold growth as well as swelling in the memory foam. Furthermore, the mattress protector will slow the wear and tear of the top layer of memory foam.

If you don’t want to put a plastic protector on the mattress, then you can make do with fitted sheets. Note that the sheets need to be washed periodically, or else any stains can seep down into the bed. If you’re sweating a lot in the bed, you may need to increase ventilation in the bedroom or put a cooling memory foam mattress topper on the bed.


All beds wear out over time. However, there are steps you can take to make up for the sagging or lump surface. And there are things you can do to prevent the bed from sagging before its time, extending its life and improving the return on the investment in your new bed.