Not only are saggy mattresses uncomfortable, but they will also greatly decrease sleep quality and have a negative effect on body alignment and health. If you’re waking up sore in your back or sinking into your bed, you may have a sagging mattress.
Not only are saggy mattresses uncomfortable, but they will also greatly decrease sleep quality and have a negative effect on body alignment and health. If you’re waking up sore in your back or sinking into your bed, you may have a sagging mattress. In many cases, adding a firm king-size mattress topper for sagging beds can help improve surface support and comfort without immediately replacing your mattress.
However, the good news is that most sagging mattresses can usually be repaired or improved without having to buy a new mattress. This guide will explain what causes a saggy mattress, how you can repair a sagging mattress yourself in a step-by-step manner, and when you should be looking to purchase a new mattress.
What Is a Sagging Mattress?
A sagging mattress can form dip patterns that can visually indicate where the mattress’s aimaterials have compressed after years of use.
Three types of mattress wear include sagging, indentations, and body impressions. Sagging is defined by a larger dip that can affect the entire support of your mattress, while indentations will be created from localized, deeper impressions. Body impressions occur from small amounts of shaping to the surface of the mattress, which is generally a normal occurrence.
If the depth of the dip is greater than 1-1.5 inches, it can typically be considered a problem.
Why Do Mattresses Sag? (Root Causes Explained)
Mattress sagging is a relatively frequent issue in people’s lives, and there are several reasons why it occurs.
Here are several major reasons for mattress sagging:
- Natural Wear & Tear
Mattresses simply break down over time through normal use and wear
- Foam Breakdown
Both memory foam and polyfoam lose some of their elasticity and become saggy over time.
- Coil Fatigue
The coils in a spring mattress can also weaken and no longer bounce back after being compressed, resulting in sagging.
- Poor Bed Foundation
A weak or broken bed frame/foundation is a very common (and often overlooked) cause of mattress sagging.
- Uneven Weight Distribution
Sleeping in the same position every night on a mattress will cause the spots that bear more weight to break down faster than the rest of the mattress.
- Lack of Rotation
Not rotating your mattress on a regular basis creates uneven compression across a mattress.
- External Damage
Jumping on a mattress, using a mattress in an improper way, or allowing moisture to accumulate in your mattress will also contribute to its rapid sagging.
Indications That Your Mattress Is Sagging
Early recognition of warning signs may help you identify issues before they reach a level of unmanageable severity.
- Obvious dips/uneven surface
- Back, neck, and/or shoulder discomfort
- Issues with sleep quality
- Lumps and/or soft areas
- Innerspring mattresses have noisy springs
- Mattresses have strange smells or signs of wear
Impact of a Sagging Mattress on Health & Sleep
The effects on your health and quality of sleep caused by a sagging mattress include:
- Improper alignment of your spine
- Increased pressure on your joints
- Development of chronic pain in your back
- Decrease in the quality of your sleep
- Worsening of sleep disorders.
Even the slightest amount of sagging can interfere with your ability to experience deep cycles of sleep.
How to Fix a Sagging Mattress (Step-by-Step Guide)
Follow these proven steps to restore comfort and extend your mattress’s lifespan.
- Bed Frame:
Inspect slats (make sure they’re not broken or have too much gap between them, and make sure center support is in place; center support is important for Queen and King beds). Temporarily put your mattress on the floor; if the mattress does not sag when on the floor, this means the base is the problem.
- Mattress Rotation and Flipping:
Rotate the mattress every 3-6 months. Flip only if it is a double-sided mattress. This will redistribute the weight and provide instant comfort improvement.
- Mattress Topper:
A topper will help make a more even sleeping surface. The best types of mattress tops are latex and high-density foam. (Note: This is not a solution but a temporary fix.)
- Add Support:
If the base is weak, place plywood or a Bunkie board under the mattress or add additional slats for additional support. This is one of the fastest and most effective ways to make repairs.
- Fix Sagging Areas:
For small depressions, you may use a flat pillow or a large towel under the sagging portion and put it directly under the area that has sagged. This is effective only for small depressions.
- Change Your Sleeping Habits:
Change sleeping positions. Don’t sit on one side repetitively. Both of these can prevent continued damage to the mattress.
Temporary Fixes vs Permanent Solutions
Understanding the difference helps you choose to repair or replace your mattress.
Temporary Fixes
- Mattress topper
- Rotation
- Pillow support
Permanent Solutions
- New mattress
- Stronger bed frame
- Better mattress material
If the sagging is severe, then the temporary fixes will not be sufficient.
Permanent Solutions for a Sagging Mattress
Long-term solutions will generally be needed when your temporary solution has not worked for you.
Replace the Mattress
Replacing old or sagging mattresses can be your best solution.
Upgrade the Bed Frame
Switch to:
- Platform beds
- Solid foundations
- Closely spaced slats
Choose Anti-Sagging Materials
- Latex (most durable)
- High-density memory foam
Best Mattress Types That Don’t Sag Easily
Selecting a mattress style that holds up to prolonged use will help avoid any problems with it continuing to sag after multiple years of use.
- Latex mattresses tend to be the most durable and have a lifespan between 15 and 20 years.
- High-quality memory foam mattresses support body weight well, with a lifespan of 8 to 12 years.
- Hybrid mattresses can offer balanced comfort but are only moderately durable.
- Innerspring mattresses sag quickly and have the shortest lifespan of all the options.
How to Prevent Mattress Sagging (Long-Term Care)
If you care for your mattress properly (in addition to following the manufacturer’s guidelines), you can greatly improve its longevity.
- Rotate Your Mattress Properly (every 3 – 6 months)
- Use a Proper Foundation (Can Cause Bed Sagging)
- Avoid Jumping On Your Bed
- Maintain Cleanliness and Dryness of Your Mattress
- Use a Mattress Protector
Preventative care is much easier than trying to fix sagging latex
Mattress Lifespan by Type
| Mattress Type | Average Lifespan |
| Innerspring | 5–8 years |
| Memory Foam | 8–12 years |
| Hybrid | 7–10 years |
| Latex | 10–20 years |
When to Replace a Mattress
A mattress should be replaced if:
- The sagging is greater than 1.5-2 inches
- Your mattress is 7-10 years old or older
- You awaken with pain
- Visible damage, such as lumps, is present
- Repair is no longer effective.
Warranty and Repair Considerations
Repair Considerations: Sagging at 2″ or more would fall under warranty repair. Repair decisions are made after evaluating both sides of the mattress repair policy. If you use your mattress improperly, you may void your warranty. Always read and adhere to the manufacturer’s warranty.
Advantages of Repairing or Replacing a Sagging Mattress
- Improved Spinal Alignment
- Less Back Pain
- Better Quality Sleep
- Increased Comfort
- More Cleanliness
FAQs
Do you experience an ache in your back from using a mattress with a sag?
Yes, misalignment of the spine will create undue force on the joints; therefore, a worn-out mattress can lead to back issues.
When is the best time to replace your mattress?
If you’re not able to correct the issue with your foundation, then you’ll have to replace your mattress.
Are mattress toppers a good idea?
While mattress tops offer an interim improvement for comfort, they don’t actually resolve underlying issues.
Why would my mattress sag in the middle?
The middle part of a mattress supports a larger amount of weight than any other area, which is why it is the weakest point.
Which types of mattresses last the longest?
Latex can last longer than the other types of mattresses and is also much more resistant to sagging.