Hybrid
Individual Pocketed Coil
Foam
Open Coil
Latex
Key Takeaways
- A dip you can feel is not always a defect. Mattresses soften and form body impressions with normal use, and warranties treat that differently from a true loss of support.
- Check the base before you blame the mattress. Put the mattress on the floor for a night or two; if the dip largely disappears, the foundation, slats or center support may be the real problem.
- Measure a sag with nobody on the bed, using a straightedge or tight string and a tape measure, and photograph the measurement, the law tag and the base underneath before you call anyone.
- Warranties are handled by the manufacturer. Missing law tags, stains, an unsupported foundation and impressions below the stated minimum depth are the most common reasons a claim fails.
- If the claim does not qualify and you still wake up sore, a replacement is usually a better use of money than a stack of temporary fixes. Test for durability in person, buy the right base with it, and protect it from the first night.
It rarely happens overnight. First you notice that you keep drifting toward the middle of the bed. Then your partner mentions it too. One morning you strip the sheets and see it plainly: a shallow valley running down the side you sleep on, or a trough in the center where two people meet. The mattress is not that old. It cost real money. And now you have to work out whether this is something the warranty should fix, something you can live with for a while, or a sign that it is time to go shopping.
This guide walks through that decision in the order it actually happens, from the first time you notice the dip to the day a new mattress is carried in. It is written for households around Richmond, Rosenberg, Sugar Land and the neighborhoods in between, including Pecan Grove, Greatwood, Aliana and Sienna, where our Richmond mattress store on FM 359 is the closest place to compare replacements in person. Nearly every step, though, applies to any mattress in any home.
If you already know the mattress is finished and just want to plan a visit, the store locations page lists addresses, hours and phone numbers for all three stores, and you can reserve time with a team member who will pull supportive options in your size before you arrive.
What Sagging Actually Is, and What It Is Not
The word "sagging" gets used for several different things, and the difference matters. It decides whether you have a warranty conversation, a base problem or simply a mattress that has reached the end of its useful life.
Body impressions versus a true loss of support
Most mattresses develop some body impressions. The comfort layers near the top conform to the shape of the person sleeping on them, night after night, and gradually hold a little of that shape. Our warranty information page puts it plainly: body impressions are a natural occurrence, caused by the upholstery layers conforming to your body, and do not necessarily indicate a structural defect. A true loss of support is different. The coils, foam core or support layer underneath have given way, so the dip is deeper, the edges of it are sharper, and it does not recover even after the mattress has been rotated and left empty for a day.
Softening in the first months is normal
A new mattress often feels firmer on the showroom floor than it does after a few weeks at home, because the foams and fibers loosen as they are used. That same warranty page lists "a normal increase in softness" of the pressure-relieving material among the things a warranty does not cover, as long as it does not affect the mattress's pressure-relieving qualities. So a mattress that simply feels a bit softer than the day it arrived is usually doing what it was designed to do. A mattress that leaves you in a hole is not.
Why the dip you feel can be bigger than the dip you measure
When you lie in a sag, your body weight exaggerates it. A gap of an inch that you can measure with the bed empty can feel like three inches when your hips are sitting in it, because the comfort layers compress further around the low spot. That is why the measurement for a claim is always taken with nobody on the bed, and why a sag that does not reach a warranty's minimum depth can still wreck a night's sleep.
Where sagging usually starts
Watch where the dip sits, because it tells you a lot. A trough down one side usually tracks the heavier or more regular sleeper. A dip in the dead center of a queen or king often points to missing or weak center support underneath. A soft, rolled edge on one side is typical of the spot where someone sits every morning to put on shoes. Each of these has a different likely cause, and one of them is not the mattress at all.
Rule Out the Base First: Mattress Sag or Foundation Sag?
Before you measure anything or call about a warranty, spend a few minutes on what is underneath the mattress. A failing base produces a dip that looks exactly like a failing mattress, and a new mattress placed on the same base will start to sag in the same place.
The floor test
Take the mattress off its base and lay it flat on a clean floor for a night or two. If the dip mostly disappears and the bed feels even again, the base was a large part of the problem. If the dip is still there with the mattress lying on a flat, rigid floor, the mattress itself has lost support. This single test saves a lot of guesswork, and it is the first thing worth doing.
Check the center support and legs
Queen and king beds need support down the middle, not just around the edges. According to our warranty page, a frame or bed frame should have at least five legs, with at least one of them supporting the slats or steel crossbars in the center, and a mattress needs a perfectly level platform or foundation underneath it. A missing or bent center leg is one of the most common causes of a center dip, and it is also a condition that can affect warranty coverage.
Slats, old box springs and hand-me-down frames
Slats that are cracked, bowed or spaced too far apart let the mattress sink between them. An older box spring can collapse in the middle while still looking fine from the outside. A frame moved from house to house may have loosened at the joints. Press down along the base with the mattress off and look for any spot that gives. Our guide to twelve base checks before buying a new mattress walks through each type of base in detail, including a straightedge test for an old foundation.
When the base is the whole problem
If the floor test shows the mattress is still flat and supportive, you may not need a new mattress at all. A new mattress foundation or a platform frame with proper center support can restore the bed for a fraction of the cost of a replacement. You can see the full range of bed frames online, then compare heights and supports in the store.
How to Measure a Sag the Way a Warranty Claim Expects
If the floor test points to the mattress, the next step is to measure the sag properly and record it. Do this before you call anyone. A clear measurement and a good set of photos make any conversation about coverage faster and more straightforward, whether it is with the store that sold you the bed or with the manufacturer directly.
- Strip the bed completely. Remove sheets, blankets, any topper and the mattress protector so you are measuring the mattress itself.
- Let it rest empty. Leave the bed unoccupied for a few hours, ideally overnight, so the comfort layers recover as much as they are going to.
- Make sure the base is level and intact. Measure on the same base you normally use, after checking it as described above, so the result reflects the mattress and not a broken slat.
- Lay a straightedge across the dip. A long level, a straight length of board or a string pulled tight and taped at both edges of the mattress all work. It needs to rest on the high points on either side.
- Measure from the straightedge down to the deepest point. Hold a tape measure or ruler vertically, without pressing into the mattress, and read the gap.
- Measure more than one spot. Check where the hips usually sit, where the shoulders sit, and the center of the bed, and note each figure.
- Photograph every measurement. Take a wide shot of the whole bed with the straightedge in place, then a close-up with the tape measure and the reading clearly visible.
- Photograph the law tag. The sewn-in label carries the date of manufacture and the warranty code. Do not remove it.
- Photograph the base. Show the foundation or frame, the slats and the center legs, because the first question after a sag is usually what the mattress was sitting on.
- Write down the basics. Note the purchase date, where you bought it, the size, how many people sleep on it, and when you first noticed the dip.
- Find your proof of purchase. A receipt, invoice or order confirmation is needed for nearly every claim.
- Keep the mattress until the claim is settled. Do not dispose of it while a claim is open, even if you have already started shopping.
What you need on hand
You do not need special tools. A tape measure, a straight edge longer than the width of the dip, some painter's tape or string, and a phone camera are enough. If you use a board, check that it is genuinely straight by sighting down its length first; a warped board will give you the wrong number.
Why nobody should be on the bed while you measure
Warranty standards are written around the depth of the impression with the mattress unoccupied. Measuring while someone is lying on it, or pushing the tape into the surface, makes the number bigger and less reliable. Measure it empty and gently, and let the photos show exactly how you did it.
Photos that tell the whole story
The best set of photos lets someone who has never seen your bedroom understand the problem in a minute: the whole bed, the dip with the straightedge across it, the tape reading, the law tag, and the base underneath. Take them in good daylight. If the mattress has any stains, photograph those honestly too, because they will come up either way.
What a Warranty Usually Covers, and What It Does Not
Every mattress warranty is written by the manufacturer, and the details vary by brand and model. Still, most follow the same pattern, and our warranty page lays out the main points clearly enough to set expectations before you call.
The manufacturer covers it; the store helps you file
Your warranty is covered by the manufacturer, not by the store that sold you the mattress, and the process can differ by product type and brand. What a local store can do is help you gather the right information and guide the claim through, which is a real advantage when you would rather not navigate a manufacturer's claims department on your own.
The minimum-impression rule
Nearly every warranty sets a minimum depth an impression must reach before it counts as a defect. Impressions shallower than that are treated as normal wear. The exact figure is in your warranty document and varies by manufacturer and model, commonly somewhere around three-quarters of an inch to an inch and a half. This is why measuring carefully matters so much. If you want a plain-language overview of how these terms work, the mattress warranty explainer covers length of coverage, prorated terms and more.
The exclusions that stop most claims
According to our warranty page, the things not covered include comfort preference, normal wear and tear, impressions below the minimum depth, physical damage such as burns, cuts, tears, liquid damage or stains caused by use, and damage due to an inappropriate foundation or inadequate center support. The same page lists what can void coverage altogether: stains and soiling, an improper or unsupported foundation, a frame without adequate center support, and a missing law tag. That is a good reason to check the base and the tag before anything else.
Who the warranty belongs to
Warranties are typically non-transferable. Our warranty page states that coverage applies only to the original purchaser and to mattresses bought directly from an authorized Mattress On Demand location. A mattress that came with a house, was bought secondhand or was passed down from a relative usually has no claim path, even if it is fairly new.
Checking coverage before your next purchase
If you are replacing a mattress because a claim did not qualify, it is worth asking about coverage terms up front next time. Our guide to twelve warranty and protection checks before you buy lists the questions to ask, including the body-impression standard and who handles a claim.
How to File a Claim for a Mattress Bought From Our Stores
If you bought your mattress from one of our three locations and the measurement looks like it may qualify, the process is designed to be simple. Here is what to expect, based on the steps set out on our warranty page.
Step one: gather the information
Collect your proof of purchase, the product details, including the model and any serial number from the law tag, and any warranty documents or registration details you received. Add the measurement photos and notes from the checklist above.
Step two: contact us with everything in one place
Reach the team through the contact page, by phone, or in person at the store where you bought the mattress. Sending all of the information together avoids back-and-forth and gets the claim moving sooner.
Step three: a warranty agent follows up
Our warranty page says a warranty agent will contact you within 48 hours to process the claim, so keep your paperwork handy. The manufacturer may ask for additional photos or information, depending on its own process.
If you bought the mattress somewhere else
Start with the retailer you bought it from, or with the manufacturer directly, using the same measurement photos and proof of purchase. The checklist above works for any claim. And if the mattress turns out not to qualify, you are always welcome to come in and compare replacements.
Quick Fixes: What Helps for a While and What Does Not
While you wait on a claim, or if you simply are not ready to replace the bed, a few stopgaps can make nights more comfortable. It helps to be honest about what each one can and cannot do.
Rotating the mattress
Turning the mattress head to foot moves the worn area to a spot where less weight lands on it. For shallow impressions, this can even things out for a while. Many modern mattresses are built to be used one side up only, so rotate rather than flip unless your mattress was designed to be flipped.
Putting a topper over a dip
A topper can add softness, but it follows the shape of whatever is underneath. Laid over a sag, it usually sinks into the same valley. A topper can take the edge off minor unevenness; it cannot restore support that has gone.
Pillows under the sag, or a board under the mattress
Some people tuck a thin pillow under the low spot, or slide a sheet of plywood between the mattress and a weak base. These can buy a few weeks of better sleep, and the board trick is really a base repair in disguise, which points back to the floor test. Neither fixes a mattress that has broken down, and neither should replace a proper foundation.
When a quick fix becomes false economy
If you are layering a topper, a board and a pillow to get through the night, the stopgaps are costing you sleep and money. At that stage it is usually more sensible to put the same money toward a mattress and base that work together, especially if you are waking up sore.
Signs It Is Time to Replace Instead of Repair
A claim that does not qualify does not mean the mattress is fine. Here are the signs that it is time to shop, whatever the tape measure says.
You wake up stiff and loosen up within an hour
Morning stiffness that fades once you are up and moving is one of the most common signs that a mattress no longer supports you properly. It is not a medical diagnosis, and persistent pain is worth raising with a doctor, but many shoppers notice the difference once they sleep on a supportive bed. Our in-store support tests for back comfort explain what to feel for.
The two of you keep rolling toward the middle
If you and your partner end up in the same trough every night, the center has given way or the base underneath has. Once the floor test rules out the base, this is a strong sign the mattress is done. Shared-bed shoppers can start with our mattresses for couples and compare motion and edge support in person.
The dip is below the claim threshold but you still cannot sleep
This is the most frustrating situation, and it is common. A three-quarter-inch impression may not qualify for a claim, yet it can still pull your hips out of line every night. Comfort is what matters here, not the paperwork.
The mattress has simply had a long life
There is no single expiry date for a mattress; lifespan depends on materials, body weight, how many people use it and how it has been supported. Our articles on how long an average mattress lasts and the signs it is time to replace a mattress go through the other clues, from noise and allergies to sleeping better in hotel beds than at home.
Shopping So Your Next Mattress Does Not Sag Early
If you are replacing a mattress that sagged sooner than you expected, the aim is simple: do not buy the same problem twice. A few choices make the biggest difference.
Match the support to your body weight
Heavier sleepers put more load on the support core and the comfort layers, and a mattress that is perfectly adequate for one person can wear quickly under another. If this applies to you, our guide to support and durability checks for bigger bodies covers what to look for, including coil support and edge reinforcement.
Look at the support core, not just the top
The comfort layers are what you feel first, but the core underneath is what holds its shape over years. Many shoppers who want lasting support start with hybrid mattresses or individually pocketed coil mattresses, which pair a coil unit with foam or fiber comfort layers. Others prefer the feel of foam mattresses. Either can be a good choice when it suits your weight and sleep position.
Thicker comfort layers are not automatically longer-lasting
A plush top feels luxurious, but deep soft layers can show body impressions sooner than a firmer surface. If you love a softer feel, it is worth understanding how pillow tops and euro tops differ and choosing one with a strong core beneath it. Compare soft, medium and firm options side by side rather than deciding on feel alone.
Buy the base with the bed
If the floor test showed your old base was part of the problem, replace it at the same time. A new mattress placed on a tired foundation is the fastest way to a repeat dip. Many shoppers also consider an adjustable base, which supports the mattress evenly and adds head and foot positions; our adjustable base guide explains how they work.
Protect it from the first night
Stains can void a warranty, and a protector is the simplest way to keep the mattress clean and your coverage intact. Browse the mattress protector collection and put one on the day the new bed arrives.
How to Test for Durability in the Richmond Showroom
No showroom test can show you how a mattress will feel in five years, but a careful visit tells you a lot more than a quick bounce. Here is how to use the time well.
Lie in your real sleep position for ten minutes
Two minutes on your back tells you very little if you sleep on your side. Lie the way you actually sleep, for long enough that your body settles, and notice whether your hips sink noticeably lower than your shoulders. Our Richmond showroom visit plan lays out a simple order for testing several beds without losing track.
Sit on the edge where you sit every day
If you always sit on one side to put on your shoes, sit there on each finalist and feel how much the edge rolls under you. Weak edges are often where the first visible wear appears.
Test with your partner if you share the bed
Two people lying together tell you far more than one person testing alone. Lie side by side, roll toward the middle, and see whether you end up in a shared dip or each stay in your own space.
Ask about coverage before you decide
Before you commit, ask what the warranty's body-impression standard is for that model, what base it requires and how a claim would be handled. A good team will answer without hesitation. Every in-store team member is trained through our Certified Sleep Science Coach program, so you can ask detailed questions.
Consider a fitting before you test
If you are unsure where to start, a ScanFit fitting gathers your sleep position, pain points and comfort goals before you lie down, which narrows the field. Our guide to what a body-scan fitting can and cannot tell you explains how it works alongside real showroom testing.
Delivery, Setup and Getting the Old Mattress Out
Once you have chosen a replacement, the last step is getting the new bed in and the old one out, ideally in the same visit.
Doorstep delivery or full setup
According to our delivery and pickup page, at the time of writing the options include free doorstep delivery, delivery and setup in the room of your choice by the Mattress On Demand team for $99, and delivery and setup including an adjustable base for $149, as well as customer pickup. Confirm current options when you order.
Removal of the old mattress
The setup options include removal of your old mattress and box spring, if needed, along with the packaging. That saves a trip and the hassle of disposal. If you are handling it yourself, our old mattress removal guide and the article on mattress disposal and recycling cover your options.
Before you let the old mattress go
If a warranty claim is still open, keep the old mattress until the claim is resolved, and make sure you have all your photos saved somewhere other than your phone. Also measure your stairs, halls and doorways if you are sizing up; the measuring and delivery-path guide shows how, and the queen-to-king upgrade checks help if you are thinking about a bigger bed.
Paying for an Unplanned Replacement
A sagging mattress rarely arrives on a convenient schedule. A few options can make the purchase easier to manage.
Financing paths
Our financing page lists three options: Affirm, which can be used online or in store; a Synchrony HOME credit card for in-store purchases, with promotional no-interest terms subject to credit approval; and Snap Finance lease-to-own for in-store purchases. Checking eligibility for Affirm does not affect your credit, according to the same page. Our article on questions to ask before you apply for mattress financing explains how to compare them.
Price protection after you buy
If you are worried about buying just before a sale, the 365-Day Price Guarantee protects eligible purchases for a full year against a qualifying lower advertised price, subject to verification. That lets you replace a bed that is hurting your sleep now rather than waiting for a promotion.
Shopping to a budget
If budget is the deciding factor, start with the value mattress range and the current sale items, then test the finalists in person. A modestly priced mattress on the right base often outlasts a pricier one on a failing frame.
Where to Shop for a Replacement Near Richmond
Three stores serve Fort Bend County and the west side of Houston. Each has a slightly different strength, and all three can help you replace a sagging mattress.
The Richmond showroom on FM 359
Mattress On Demand Richmond is at 1531 FM 359 Rd, Suite 500, and is our main store. At the time of writing it is open Monday through Saturday from 10 AM to 6 PM and Sunday from noon to 5 PM, and you can reach it at 832-413-1000. It is the natural first stop for Richmond, Rosenberg, Pecan Grove, Greatwood and Harvest Green.
The Katy store on Kingsland Boulevard
If your week runs west, our Katy store at 23233 Kingsland Blvd, Suite A, keeps the same hours at the time of writing and is convenient for Fulshear and Cinco Ranch households.
The Mattress On Demand Rosenberg
The Rosenberg showroom at 3520 FM 723 Rd, Suite M, in Rosenberg, is worth a look when value leads the decision. Check the store locations page for current details before you go.
Coming from Sugar Land, Missouri City or Stafford
Shoppers from Sugar Land, Missouri City and Stafford often find Richmond the easiest drive. Calling ahead or booking a time means someone will be ready to walk you through supportive options in your size.
Frequently Asked Questions
Should I replace my mattress if it has a dip in it?
Not automatically. First do the floor test to rule out the base, then measure the dip with the bed empty. If the base is the cause, replace the base. If the mattress itself has lost support and you are sleeping badly, replacement is usually the right call, whether or not the dip qualifies for a warranty claim.
How deep does a sag need to be for a warranty claim?
It depends on the manufacturer and model. Most warranties set a minimum impression depth, commonly in the range of about three-quarters of an inch to an inch and a half, measured with nobody on the bed. Your warranty document has the exact figure, and our team can help you find it.
Why is my mattress sagging after only a few months?
Some softening in the first months is normal as the materials loosen with use. A deeper dip that appears early often points to the base, such as missing center support or widely spaced slats, so check that first. If the base is sound and the dip is deep, measure it and get in touch with the store that sold you the mattress.
Will a mattress topper fix a sagging mattress?
Usually not for long. A topper follows the shape of the surface below it, so over a real sag it tends to sink into the same dip. It can soften a surface that is only slightly uneven, but it cannot replace lost support.
Can the wrong bed frame void my mattress warranty?
It can. Our warranty page lists an improper or unsupported foundation, and a frame without adequate center support, among the conditions that can void coverage. It describes a frame with at least five legs, including one supporting the center, and a level platform or foundation.
Should I replace the foundation when I replace the mattress?
If the old foundation is sagging, damaged or not right for the new mattress, yes. A new mattress on a worn base can develop the same dip. If the base is flat, sturdy and suitable for the new mattress, it may be fine to keep. Test it the same way you would before measuring a sag.
Can I make a warranty claim on a mattress I got secondhand?
Usually not. Mattress warranties are generally non-transferable, and our warranty page states that coverage applies only to the original purchaser who bought directly from an authorized Mattress On Demand location.
Do I need an appointment to shop at the Richmond store?
No, walk-ins are welcome during store hours. Booking ahead is useful if you want a team member to have supportive options in your size ready, or if you want time for a fitting before you start testing.
What happens to my old mattress when the new one is delivered?
With our in-room delivery and setup options, removal of the old mattress and box spring, if needed, is included along with the packaging, according to our delivery page. If a warranty claim is still open, wait until it is resolved before you let the old mattress go.
A sagging mattress is frustrating, but it does not have to be a mystery. Rule out the base, measure the dip, check your coverage, and if it is time for something new, choose a mattress and base that are built to work together. Before you settle for another year on a dip, visit the Richmond showroom on FM 359 and lie down on two or three supportive options in your usual sleep position for ten minutes each, so you know exactly what a mattress without a sag should feel like before you decide. Our team in Richmond, Katy and Rosenberg is glad to help, whether you need a warranty question answered or a better night's sleep starting this week. You can also browse all mattresses online or take the mattress guide before you visit.
