Mattresses

Published June 30, 2025

6 min

Mattress Durability: Fix and Prevent Mattress Sagging

Nectar Editorial Team

Table of contents

What Causes Mattress Sagging? Signs Your Mattress Is Losing Support Top Reasons Why Mattresses Sag (And How to Prevent It) How to Tell if Your Mattress Is Sagging: 5 Simple TestsBest Mattress Types for Durability: Materials That Last Longest How to Fix a Sagging Mattress: DIY Solutions That WorkWhen to Replace a Sagging Mattress How to Prevent Mattress Sagging: Tips for Extending the Mattress Lifespan

Have you recently started waking up with mysterious aches and pains? Or maybe found your partner rolling right toward you in the middle of the night? Issues like these might be a sign of a problem with your mattress: specifically, sagging. But don’t worry! We’re here to help you understand everything you need to know when it comes to mattress durability, why sagging happens, and – most importantly – what you can do about it.

What Causes Mattress Sagging? Signs Your Mattress Is Losing Support

A sagging mattress is a mattress that has lost its original shape and support, developing dips or depressions in areas where you typically sleep. Think of it like your favorite jeans that have stretched out over time. Except, rather than fitting you even better, a worn-in mattress can seriously impact your sleep quality and overall health.While some wear is normal over time, noticeable sagging can lead to:

Back and neck pain
Poor spinal alignment
Disrupted sleep
You or your partner rolling toward each other
That "stuck in quicksand" feeling when you’re getting out of bed

Top Reasons Why Mattresses Sag (And How to Prevent It)

Understanding why your mattress sags could help you prevent it – or at least catch it early. Here are some of the most common culprits:

Daily Use and Body Impressions

Just like anything you use daily, your sleeping surface experiences wear over time. This is especially true for high-traffic areas where you might spend the most time.

Sleep Position (Side Sleepers)

Side sleeping can create more concentrated pressure on specific areas of the mattress, particularly at the hips and shoulders. This concentrated pressure can often lead to quicker sagging.

Mattress Type

Innerspring mattresses tend to sag as coils wear out and lose their bounce
Memory foam can develop body impressions over time
Hybrid mattresses combine different materials, so their durability depends on the quality of each component

Poor Bed Frame and Foundation Support

Your mattress is only as supportive as what's underneath it, so your bed frame quality is just as important as your mattress is. If your frame isn’t providing proper support, your mattress will work overtime and wear out fasterSimilarly, old or damaged box springs can’t provide your mattress with the firm, even support that it needs. If your foundation is sagging, your mattress is sure to follow suit.

How to Tell if Your Mattress Is Sagging: 5 Simple Tests

You don't have to wait until your mattress feels like a hammock to know something's wrong. Here are a few early indicators that your mattress might be starting to wear out:

1. The Visual Check

Look at your mattress from the side. Is it still flat, or do you see any visible dips? If your mattress dips over 1.5 inches, its time may have come.

2. The Hand Test

Run your hand across the mattress surface. It should feel firm all the way across – without any sudden drops or soft spots.

3. The Sleep Quality Test

How are you sleeping? If you’ve started waking up with aches and pains that weren't there before, your mattress might be the culprit.

4. The Partner Test

If you share your bed, ask your partner if they've noticed any changes in how your mattress feels, or if they're rolling toward a certain side.

5. The String Test

Place a straight edge (like a level or a taut piece of string) across your mattress. Any gaps over 1.5 inches are sure signs of sagging.

Best Mattress Types for Durability: Materials That Last Longest

You might be wondering – if a mattress naturally wears out from regular use, how can you truly protect it from sagging? The truth is, you can’t keep your mattress from wearing down – but you can protect it from premature sagging and wear.The first step in preventing sagging? Investing in a high quality mattress from the start.

Look for These Mattress Features:

Durable materials: Premium memory foam, quality innersprings, or well-constructed hybrid designs
Strong edges: Reinforced edge support prevents sagging around the perimeter
Proper zoning: Some mattresses feature different support zones for different body parts
Generous warranty: A good warranty shows the manufacturer's confidence in their product

Consider Your Sleeping Position

Side sleepers need added pressure relief to prevent concentrated stress on hips and shoulders
Back sleepers need consistent support to maintain spinal alignment
Stomach sleepers require firmer support to keep their hips from sinking too deeply

How to Fix a Sagging Mattress: DIY Solutions That Work

Once your mattress has developed significant sagging, there unfortunately isn’t much you can do to reverse it. However, there are quite a few temporary solutions that can help you sleep more comfortably, and extend the life of your mattress while you decide on next steps.

Add a Mattress Topper

A quality mattress topper adds an extra layer of support and cushioning, making your sleeping surface significantly more comfortable. It won't be able to fix underlying structural problems, but can definitely help level out minor depressions and add years to your mattress life.

Flip and Rotate Your Mattress

Some mattresses can be flipped, while others might benefit from regular rotation. This redistributes wear patterns and can help prevent concentrated sagging.Be sure to check if your mattress can be flipped or rotated! Many mattresses – like Nectar’s – are constructed with comfort layers at the surface and support layers at the bottom. They shouldn’t be flipped or rotated.

Check Your Mattress Foundation

Sometimes the problem isn't even your mattress – it's what's underneath. If you think your mattress is sagging because of a worn out bed frame or box spring, replacing them may help mitigate the damage.

When to Replace a Sagging Mattress

Try as you might – sometimes a mattress is simply beyond saving. Here's how to know when it's time to replace your mattress:

Visible sagging exceeds 1.5 inches
You consistently wake up in pain
Your mattress is over 8-10 years old
You sleep better on other beds
Your allergies seem worse (old mattresses can harbor allergens)
You can feel your mattress’s internal structure (springs, coils, or base layer)

How to Prevent Mattress Sagging: Tips for Extending the Mattress Lifespan

Whether you’re trying to protect your current mattress from future sagging, or have had to bite the bullet and buy a new one already, there are quite a few things you can do to make sure your mattress lasts as long as it should.

Bed Frame and Foundation Setup

Invest in a sturdy bed frame with proper center support
Use a quality box spring or platform that matches your mattress size
Ensure your foundation can handle the weight (some high-quality mattresses are heavier than you'd expect)

Mattress Care Tips

Use a mattress protector to prevent moisture damage
Keep your bedroom at consistent temperature and humidity levels
Vacuum your mattress periodically to remove dust and allergens

What to Look for When Buying a Mattress

Whether you're evaluating your current mattress or considering a replacement, understanding the signs of sagging and proper care techniques will help you make informed decisions about your sleep health. Quality sleep isn't just about comfort—it's essential for your physical health, mental clarity, and overall wellbeing.

Purchasing a Mattress:

Look for mattresses with reinforced edges and quality construction
Pay attention to weight limits and recommendations
Consider your sleeping style when choosing firmness
Don't forget to account for your partner's preferences too

Maintaining Your Mattress:

Regular maintenance can significantly extend your mattress life
Investing in quality from the start saves money in the long run
Your sleep quality directly impacts your overall health and wellbeing

Can't decide which mattress is right for you? Take our mattress quiz to find the best match for your sleep style.