How to Reinforce a Sagging Mattress with Plywood... in Under 5 Minutes

07:10, Friday 20/01/2023 - Pro Reviewer I have 5 years of experience in blogging...

Do you have trouble falling asleep or staying asleep due to pain in your neck and back?

Sad to say, I can relate. Your sagging mattress is most likely to blame rather than age, kids, or stress.

The good news is that you have found the correct location to address this concern.

You can get a better night's sleep and keep your mattress in good condition by placing it on a sheet of plywood. Your sagging mattress can be easily repaired by measuring the area, laying down plywood sheets, and giving it a try.

We'll also discuss the differences between plywood and other materials and the reasons why your mattress is sagging.

Get from a lumpy bed to a soft one in less than five minutes by reading on.

Use plywood to fix sagging mattress When you sleep on a mattress with good support, you sleep better.

If your mattress is sagging due to age or broken springs, you can prevent further sagging by placing a plywood plank under the mattress.

Verify that sagging is the problem before you go dumpster diving or buy a sheet of plywood.

Take off the mattress cover and check it thoroughly. Take note of any low spots in the center or on the edges. Try a few different spots while lying down to evaluate the cushioning.

Put a rod or ruler on the area to check for sagging if you can't tell. There will be a space where the mattress isn't perfectly flat. Spooning hotspots are also prone to this problem. ) the most Find it, and then you can do something about it!

Just so you know, plywood won't work to repair an innerspring, water, or air bed. Get advice from the retailer or producer.

First, Conduct a Measurement

In order to get started, you'll need to measure the size of your bed's base to ensure that you have a plywood sheet that can accommodate it.

If not, have one custom-cut at a local hardware store.

Using a soft plywood such as AB or BC is recommended. It needs to be at least three quarters of an inch thick to support the mattress and anyone sleeping on it.

Plywood Any plywood used must be at least 3/4 inches thick to provide the necessary support.

You can access the box spring base or frame by carefully lifting the mattress with the help of a partner.

To finish, spread the sheet across the length of the bed and make sure it fits snugly on both ends. Make sure the planks are evenly spaced if you're using them.

#3 Test It

Lay the mattress down on the plywood and see how it feels and how much room you have to move around. If you don't hear any creaking or bending, the planks are in the right place.

The sag should have immediately decreased or vanished.

That settles the matter Let's address some of the most frequently asked questions and concerns.

Can Plywood Be Used for Bed Slats?

Sagging mattresses may be the result of old or overused bed slats.

The problem can be fixed by simply placing a plywood sheet over them. You could also use plywood slats in place of the metal ones currently on your bed. You need only have them trimmed to size and set in place.

Be sure the slats are at least three-quarters of an inch thick once more for stability.

Plywood vs. Other Solutions for a Sagging Mattress

There are alternatives to plywood for repairing a sagging mattress.

They aren't as supportive, but they'll get you through the night until you can find a better option.

These are:

Pads for Mattresses

Mattresses that have sagged in the middle are often given new life with the help of toppers. They offer great back support and come in a variety of sizes and thicknesses made from memory foam or microfiber.

An additional reason to use a topper is the positive effect it has on your health, specifically your temperature and the quality of your sleep.

Some people prefer a more supportive mattress and toppers can be too soft. Explore both options and make a decision based on your experience. Further, toppers won't do much good if your mattress already has significant sagging.

Not forgetting that mattress toppers raise the level of your bed is essential. Your standard size bed linens may not fit. You may find that you need a new, larger flat sheet or coverlet as a result.

Utilizing Cushions

The use of pillows is the quickest solution, but it shouldn't be used permanently.

You can fix the sagging by placing your thinnest pillows over it. Place your fitted sheets on top, and then cover the mattress with a mattress protector.

You can sleep more soundly on that until you can replace the box springs, use plywood, or get a new mattress.

Matters Relating to Plywood

Placing plywood under a sagging mattress can make a big difference, but it's not a long-term fix.

Without replacing your mattress and possibly getting a new support base, your mattress will continue to sag. And that's when you know it's time to buy a new bed.

Plywood sheets have the additional problem of suffocating the mattress. This can lead to the growth of mold or mildew, further reducing the resilience of the mattress.

Avoid this by using separate, evenly-spaced planks for the floor. This lets air flow through and dries out any moisture from underneath the bed.

Reasons for Mattress Sagging

Even if you invest in a high-quality mattress and adhere to all of the manufacturer's care guidelines, your bed will eventually sag from regular use and age.

The following are some of the most frequent causes of a mattress's sinking:

Habit #1: Always Using the Same Bed

There is always someone on your favorite side of the bed. The internal support structure of the mattress can be stressed by weight distribution to the right, the left, or the center.

What this means is that your mattress may lose its ability to provide adequate support while you sleep.

Unless you have a custom mattress with lumbar support, rotating your mattress every few months is the best way to avoid this. Turn in clockwise or counterclockwise 180-degree increments.

Now that you've done that, you can turn it over and try again. This should relieve stress and keep things from getting too tight or too compact.

You can also try switching to the opposite side of the bed, though this may not be possible if you only have one bed or are using a double bed.

Problem #2: Lack of Upkeep

Mattress maintenance is typically neglected. It needs routine upkeep just like your stove, refrigerator, and furniture.

In addition to turning your mattress regularly, you should also clean it regularly.

Put a protector over your mattress and change your linens and pajamas every week. Why Because human bodies leak oils and dead skin cells into the mattress, which breaks down the padding. This can lead to sagging and discoloration in the mattress.

Make sure to use a watertight cover if you have kids or pets to avoid any leaks in the event of an accident. Not only will this cause wear and tear on your mattress, but it can also lead to unpleasant odors and provide a breeding ground for bacteria.

When moving, it's also important to properly cover and transport your mattress. Mattress springs can be damaged by bending or folding.

You should lay your mattress on its side, protect it with a waterproof cover, and then strap it securely to the truck for transport.

#3 Used Bedspread

Most mattresses are good for between 7 and 10 years, though this varies widely by manufacturer.

Since this is the case, your mattress will eventually sag even if you regularly rotate it.

You can either get a new mattress or put some sort of support under your current one. With the latter, you may be able to extend the life of your bed by a few years.

Mattress Quality, Number Four

Various mattresses exist, and not all of them are equivalent

Mattresses are expensive, so it's important to invest in one that's well-made and won't let you down. Despite the higher initial cost, you won't have to worry about needing to buy a new mattress every few years.

However, if you have been given a used mattress by a friend or family member, you should inspect it thoroughly for any damage or wear before using it, even if it is a high-quality brand.

To make sure it will serve your purposes, you should try it out in advance. Keep in mind that it may only have a few months (or even years) to live. No longer available; in the interim, use a backup plan

5. Spring Breakage

Box springs are the standard support system for mattresses. Because of this, the bed is raised, shock is absorbed, and the mattress lasts longer.

A box spring's strength and ability to support a mattress decline with time and use. If you or your children frequently jump on the bed, you may cause this to happen sooner than expected.

Kids Jumping On Bed to Damage Springs Picture by Pexels user Alex Green

If your bed's springs are broken, it will make noise whenever you shift position and will sag noticeably. There is bowing across the bottom of the frame as well.

The problem can be fixed by either placing temporary support under the mattress or replacing the box spring base (the latter of which is typically less expensive than purchasing a new mattress).

Should You Replace Your Mattress Every X Years?

When plywood and toppers stop being effective is the simple answer to your question.

Your mattress will eventually need to be replaced. Sure, you can get a few more years out of your bed if you use plywood or toppers, but if getting into bed feels like sinking into quicksand, you're doing more harm than good.

The cost of a good mattress may seem insurmountable, but the value of a good night's rest is immeasurable. Getting a new, high-quality mattress has been shown to improve sleep quality and decrease back pain.

Many people are sleeping on beds that are older than nine years, which means they are not getting the health benefits of sleeping on a newer bed.

While it's true that a quality mattress can cost anywhere from $1,000 to ,000, the money you save by not having to deal with health problems related to a lack of sleep support (not to mention the effects of low mood and diminished work performance) makes the investment more than worthwhile.


If your mattress is sagging, you can get a better night's rest by placing a sheet of plywood under it.

Buying the wood, placing it under your bed, and sleeping soundly are the only things standing between you and a good night's sleep. If you have the sheet on hand and a helping hand to lift the mattress, this task should take less than five minutes to complete.

Instead of spending a small fortune on a new mattress, you can get more use out of the one you already have by covering it with plywood. Sheets and planks are a stopgap measure only. Once the sagging has returned, it's time for a new mattress.

Consider both the price and quality before making a purchase. Buying a low-quality mattress and then having to replace it with plywood is a nightmare.

It is appreciated that you took the time to read this manual. Read the linked articles if you're interested in learning about alternative quick fixes:

Home - Plywood - Use Plywood to Reinforce a Sagging Mattress... in Just 5 Minutes

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