Do you need a boxspring?

No, they're very different sizes. And a Cal King is not two twin boxsprings.

Can I use a California king which is twin box springs for a full or double mattress?

No, a typical bed frame cannot support a mattress. You can put it directly on a platform bed or on the floor. A regular frame will just have one center support bar and huge gaps in between.

I have a Sherwood King Pillowtop mattress, the tag/label says I do not need and can be used without a foundation. So am I able to put it directly on the bed frame with no problems?

I was wondering if I could get more information about headboards?

The boxspring is split. Otherwise it wouldn't fit through doorways or around corners. You don't need to separately order two boxsprings. If you order a "California King Boxspring" it'll come in the two pieces. An exception would be if the "boxspring" is actually a platform bed or something, or maybe some "build it yourself" boxsprings. But standard Cal King boxsprings will be split.

I read on one site that my California King memory foam mattress needs two box springs...? Do you happen to know if that’s accurate?

Boxsprings shoudln't be needed, assuming the platform beds have slats close enough together (i.e. no more than 3 inches apart).

We are about to buy twin beds for our 3 year olds. Our top picks are all platform beds which come with slats included. Do you think a box spring is still needed?

Those terms are synonymous.

Would a foundation be ok to get as well?

The slats should be no more than about 2.5-3 inches apart. So unless those are huge slats, you will need a boxspring.

Hello I just bought a new memory foam mattress and then I bought a new bed frame separately. It describe the frame as a platform bed frame but only came with 3 slats. Would I need. Box spring with this or would I be able to just lay the bed on top?

That depends on the frame... but every storage frame I'm aware of don't require a boxspring.

Would you use box springs with a storage bed frame?

Some manufacturers require it for the warranty, but not all of them. It's a good idea to have, and many full sized frames will have it anyway. (In fact, I think most will).

Do I need a center support on a frame if I have a box spring on a full size bed?

No, that should provide proper support as long as it's still in good condition.

I put new mattress in old waterbed with plywood foundation and hard plastic Matt's,do I need a box springs?

Not generally, unless you already have a platform bed. Plywood by itself won't be strong enough to support the mattress across a regular frame with one center bar.

Can I use plywood as a "foundation" instead of box springs or bunkie board? (those make the bed too high)

What a killer web site! I've been clicking and reading here for an hour today. THANK YOU for the education! I always knew how important sleep is, but not how to shop for a mattress. Will commence tomorrow. Can you imagine what this world would be like if everyone got enough high-quality sleep? Unfathomable. (What a fantasy.)

No, bunkie boards don't have the structural integrity to support itself and the mattress without a lot of slats or something similar underneath. They can't bridge larger gaps.

I don't sell products directly. You can buy a new foundation from the links on my site, and I'd get a commission if you did so, but that's as close as it gets to "buying it from my company."

Can I use a bunkie board with a regular mattress on standard bed frame?

My grandson has Lennox-Gastaut Syndrome which is a form of epilepsy. I would like to know if I am able to purchase a coil bed spring to hold a queen size mattress from your company. I have purchased box springs and mattresses for his bed, but when he has a seizure in bed the box spring is destroyed. The cost of replacing the box spring is ridiculous. I have a coil spring on a full size bed, but he is too big for the bed. Thank you for the courtesy of a reply and for taking the time to resolve my problem.

We are wanting to invest in a king size bed and mattress. What’s your suggestion?

You might need a different mattress. It has nothing to do with the boxspring. There is no difference between a low and regular profile in terms of support.

I recently purchased a plush pillow top mattress with a regular box spring. It was kinda tall, so I switched to a low profile with the assurance there would be no difference in support. After the first night I slept on it my back hurt the next morning. Which has continued over the last few days. IAny thoughts or suggestions??

There are low profile boxsprings which will save you a few inches. I'd recommend going that route. Most boxsprings are about 9 inches thick. The low profile ones tend to be 4 or 5 inches. There are even "ultra low profile" boxes made by some manufacturers which are more like 2.5 inches if you want to go that far.

I have one of those really high beds with a boxspring that I have to use a step stool to get into. I am getting older and for see a time when that won't work for me. I need a new mattress. My question is can I get a mattress with a boxspring so that it will be lower. Or should I put a piece of plywood down and put mattress on top, ??? I think that would make it low enough to just sit on.

They should be fine, but just keep an eye on them. You may need to replace them before you need to replace the mattress since they're older already.

I'm seriously thinking about trying a Leesa foam for my wife and I, both in our early 70's. We have a bed frame with legs on all four corners and underneath the slats. Our box springs (2 twin for King Mattress) are 10yrs old and look to be in good shape according to our inspection. Would this suffice for a new Leesa foam mattress?

No, as long as two things are true: 1) The "boxspring" is a rigid foundation, and not an old-school type that uses actual springs in it. (Most new boxsprings are actually foundations) 2) The platform bed is good quality and forms a rigid support.

Is there a difference between a matress that rests on a box spring and a matress that rests on a platform bed?

If you need a mattress and don't know what kind you want, I'd recommend reading my Mattress Buying Guide.

I need a box springs and mattress that will fit the Erin panel bed I bought from Wayfair. What do you suggest!

You mean put one mattress on top of the other? That's a bad idea. That voids the warranty of the mattress and will wear them both out more quickly. It also dramatically changes how the mattress feels.

can you take two king mattresses and put on plywood and get rid of the box spring? Thank you!

Whatever boxspring the mattress is designed to work with.

What box springs do I need for the Erin Upholstered black bed?

You would need a sturdy surface to put the mattress on. I just don't know whether or not the drawers will be strong enough. They very well may be, but I just don't know enough to say for sure.

Hi there, I want to make a storage bed out of ideas drawers, can I put the mattress straight onto drawer top or do I need to build some sort of base on top of the drawers?

The mattress dimensions are maximums. If a queen is 60x80, for example, that means you could get a mattress that's 59.5" x 79.5", and that is perfectly within spec.

I'm sort of repeating "Char"'s question from July 2017. I'm looking to get a new mattress and a NEW foundation/box (mattress is ancient and on the floor - its foundation went away several moves ago). Some stores (physical/online) have great mattress prices but the foundation is almost the cost of the mattress (I need split or unassembled to be able to get it upstairs). I was thinking of buying the mattress from supplier A and the foundation from supplier B. I saw earlier you suggested a Zinus foundation, but that foundation is 1/2 inch smaller on each side (though the price is ideal). Would the 1/2 inch smaller be an issue with the support of the mattress?

You cannot use a boxspring on an adjustable base. They're rigid and won't bend. I don't know what you mean by bed frames that "do not require boxsprings and work without slats." Are you referring to headboards and footboards?

does an adjustable bed frame preclude the necessity of a box spring if a bedframe specifies a box spring is required? or do i need to find bedframes that a) do not require box springs and b) work without slats?

I was just reading some of the Q&A you have posted about base support and there is a reason waterbeds had to have load distributing base supports. A twin size water bed used to hold in excess of 100 gallons of water. That is about 834 pounds plus bedding and occupant(s). Plywood flexes based on the number of plies, the thicker the plywood, the more plies and the less flexible and stronger it is. I had a queen size semi-waveless many years ago and I would estimate the filled weight at about 1500 pounds.

There are a lot of options that are tall and don't require a boxspring that you could use, to mitigate the height. For example, this one on Amazon is sturdy and has plenty of space.

I am virtually certain that waterbeds did not sit on unsupported plywood. Those foundations generally had a support structure underneath the plywood. In a normal bed frame, there will be a giant unsupported gap between the side rails and the crossbar in the middle that will put a lot of stress on the plywood. Additionally, that would not qualify for proper support for warranty purposes, so if the mattress started sagging, even if it was unrelated to the support, the warranty would be voided. So I do not recommend using only plywood.

I bought a twin xl mattress and box spring and am now looking for a bed frame that allows storage under it. I didn't realize it might be too high. my son is 6 foot tall. if I get a metal bed frame that is 14 inches high will the bed be too high? These are traditional height mattress and box spring.

Does a 3/4" thick piece of plywood the size of the bed frame and laid in the bedframe serve as a good enough platform for a mattress? For example water beds just sat on plywood and their are waterbed .conversion mattresses that would sit just on this plywood. Are those mattresses made any different from others?

Not all foundations are made the same. Some are stronger than others. Some use wood, some use metal. There are also varying types of wood that they can use.

I'm debating whether or not I should buy the foundation from the same retailer. That's an extra $150+ though. Are all foundations made the same (wood, fabric, etc.) and should I buy elsewhere to save some cash?

You can still buy pre-assembled regular boxsprings from any mattress store. They're just difficult to ship for places like Amazon since they're so large.

It should be okay for just a few days, but it's not a good long-term solution. The floor provides proper support too, if that's an option.

Do you have any suggestions for getting a new box spring. I am seeing those you can assemble yourself made of spruce ( not the best, I assume) or metal ones that fold up, etc. What happened to pre-assembled regular box springs?

I'm waiting a few days for the proper frame/foundation to ship for my new memory foam mattress. I don't want to wait to use it-my back is killing me! We have the old "springy type" box spring. Will it mess up the mattress to use it on that box spring for the few days I'm waiting for the proper frame??

If it says you need a boxspring, that means the bed doesn't have the proper support to fit just the mattress. The mattress will likely fall right through whatever crossbars it has.

Hi I'm looking at a four poster bed I want to buy but says I need a box spring. So does that mean the mattress won't fit on the frame? I'm confused....

Yes, they're generally pretty strong. As long as it's not so old that it's falling apart, it'll do just fine.

I have a old, but beautiful waterbed. Can a waterbed act as a platform bed, and not require a box spring?

Thanks for responding. I just wonder if it will provide enough support to the mattress? And about the mattress warranty.

Those are fine, but won't usually last forever. The difference between that and a platform bed with slats is that it is kind of in a "mesh" design. The metal runs both top to bottom and side to side. That's different than in a platform bed in which the slats only run side to side.

What do you think about the raised metal platform beds sold by Costco and Mattress Firm? https://www.costco.com/Blackstone-Elite-SmartBase--King.product.100306832.html http://www.mattressfirm.com/mattress-firm-direct/deluxe-raised-metal-platform-frame/mfi110011.html They say you don't need to use a boxspring and it won't void the warranty. How can this be true when there is more than 2" between the metal scaffolding? I like the idea of all of that storage underneath, but worry about the warranty and also how would it feel without a boxspring?

I assume you have a mattress and boxspring currently? You should get both a new mattress and boxspring, because a 14 year old boxspring won't likely support a new mattress. Especially if you keep the mattress a while, and you end up with a 6 year old mattress on a 20 year old boxspring.

I have a queen size bed its not expensive @ all about $200 I had it since 2003 my body aches so bad every morning also I like a high bed should i buy another boxsping for more supported or another mattress?

My sister had a bad lumbar problem. She was crying over the phone so I came over. She was limping all over the place and couldn't even sit down. I went to her bedroom and it was big enough to put her mattress on the floor. I helped her slowly lay on the mattress on the floor. I gave her some yogurt to coat her stomach for two aspirins and then gave her two tylenol. She took some days off of work and started getting back some of her lost sleep previously. She see's this idiot of an orthpaedic doctor and he says you need a new mattress. She said it helped. I layed down on it still on top of the old boxspring foundation. I have a bad back too, in the back of the mid to upper torso. My back still hurt some. but if i didn't have a bad back, if i slept on her dumb combination i surely would get sea sick. i mean the new mattress rocks and rolls with every body movement. she says she often falls out of bed in the middle of the night....duh.

[…] Reference: v2.mattressnerd.com […]

Those slats sound like they're probably fine, though a bunkie board will help even that out even more.

Hi I bought a platform bed and the slats are 2.5 inches wide. Reading through your article and the comments, I understand that's not ideal. My problem is that even a low profile box spring will add 4-5 inches height. The folks who delivered the bed said we should use a bunkie board that would add only 2". Your advice please? Also any referral on where to buy a good one? Thanks

Thank you so much for this information - you are the only person who gave a direct answer to this question. I search for a couple of hours and was getting off the wall answers.

A boxspring isn't open on the top. Even if the slats are further apart inside, there's still no space for the mattress to sag into. All of the ones I can think of have some kind of board on top of those internal slats if they're that far apart.

I understand it's recommended that any slats in a bed foundation be 2 inches apart or less or that one should use a rigid box spring. However, I am considering using a box spring for the mattress I just purchased and many of the ones I've looked at online (either wooden or metal rigid foundations) say that the internal slats are 4-5 inches apart, if that information is even available at all. Why is it that a box spring having slats that far apart is okay but, say, a platform bed with slats more than 2 inches apart won't provide proper support? Thanks so much.

Yes. The foundation needs to be supported. There's no benefit to removing slats.

If I buy a full-sized mattress along with a 5" foundation, do I still use the slats that came with my new bed (Avondale)?

A step stool will work but be careful you don't trip on it getting out of bed.

Whomever recommended 3" for airflow doesn't know what they're talking about. 1) In most mattresses, air flows through the sides, and 2) a 2 inch gap is no barrier to air. Hold two pieces of wood two inches apart up to your mouth, and you'll find you can breathe just fine. 3" is too far apart for many mattresses. The mattress will just sag through the slats. In an innerspring mattress, 3" is wider than the width of many coils, so some coils will have nothing underneath to hold them up. For foam mattresses, they'll just contour around those 3 inch slats.

I notice you recommend no more than 2" spaces between slats; I've read elsewhere 3" for airflow. Can you please provide more information around your suggestion for 2" gaps? Thank you

3 inches is a bit far for a regular mattress.

I have a queen size futon frame. The slats are about 3 inches apart. However, the futon "mattress" itself is extremely heavy. Will it support a regular mattress ?

My new foam mattress is so tight in my platform that I can not get the sheets around the mattress it is so tight. Well adding a 4-5 inch low profile box spring bring the bed up high enough to make the sheets go around my 10 inch foam mattress. Wondering if my mattress will even expand pass my platform. Help

I'm not aware of any like that, because the motor will generally hang down from the bottom. So even if it didn't have legs, you'd have the motor in the way.

There is a little more motion transfer than if it were just pure memory foam, but less motion transfer than an innerspring. The 5 year old boxspring might be okay, as long as it's rigid (i.e. doesn't have springs in it) and is in good condition.

I have a platform King sized headboard with side rails and a drawer on the foot end. Are there any adjustable bed frames that will allow me to keep the storage drawer? Do any adjustable frames come without legs so they can be placed on platform slats?

Does the Leesa transfer motion to the other person because of its bounciness? Can I use a 5 year old boxspring with it?

I wouldn't recommend using the old boxspring, especially since it seems like they're actual springs rather than a rigid foundation. The plywood might help a little, but you run the risk of having the boxspring break in the next 10 years. Are there no boxsprings out these days that look somewhat like your current one? I'm trying to remember the boxsprings from 10 years ago and I don't recall anything looking particularly special.

We're going to buy either the Alexander Medium or Leesa to replace a conventional mattress (a Serta "Perfect Sleeper" about 10" high )we've had for over 10 years and are really looking forward to the experience after reading reviews and descriptions. My questions is about the base. WeI have an Iron / Brass frame supporting box springs and the mattress (Queen size) and hoped to just put the new mattress on the existing box springs. I'm a little scared after reading your warnings about old box springs - it looks & seems to be in good condition, but I don't know how to really evaluate this. I thought about getting a 1/2 - 3/4 inch plywood to put on top of it, then put the mattress on it. Is that an option? My wife & I want the "look" of our existed bed in the frame.

Did you get your nano yet? we are considering a nano2

If their foundation is a rigid foundation, then the one you use should also be rigid. If your current one uses actual springs, it might make sense to get a new one.

We have just ordered a Charles P. Rogers Powercore Estate Nano 2 Cal-King mattress. This is a luxury mattress, but they want another $600 for the foundation. Our current split Cal-King foundation is only 7 years old, and looks like new. Is there any reason we should pay all that extra money for the new foundation? How would we know if our current foundation has been compromised in any way? I'm not sure if I care that the warranty might be voided if we don't buy their foundation. What do you think?

It will probably be very high, but sure, it will work.

I love the look of a platform bed with the tall headboard, I also love to sleep pretty high off the floor, I have a new mattress and boxspring already- can I put both on a platform bed? The headboard part of it is really tall so I think height wise it'll be okay there but I can't quite picture it, would the boxspring fit right/ look right on top of the slats? Thanks.

That's a good question. My gut instinct says "no, that will hurt the foam," but you might want to email them to ask just to be sure.

Nope, there is no different. Almost all "boxsprings" today act as solid platforms.

Hi, Matterest Nerd, With today's Matterest construction. Can you feel a difference between a mattress on a box spring or on a solid platform? Frank

Hi , we just recently bought a platform storage bed and with the mattress it seems way too high and uncomfortable. What are my options to lower the base ( drawer storage below) . So it does not feel so uncomfortably tall?

The "boxspring" is just a rigid foundation for that mattress. Any rigid surface will work.

Hi, I recently purchased a Serta iseries hybrid vantage plush King size. Combination of both memory foam and spring / coil system. We also purchased a new head board and frame. Problem is the base / box spring make the height of the mattress on the frame crazy high. I have examined the box spring and it fells like it is just a hard surface nothing special about it definately no springs. My question: Can I place this mattress on a solid foundation or does it need the base / box spring to improve the performance of the mattress? Current box is 8" thick Placing this on a solid surface would lower the mattress to an acceptable height given that the mattress overall thickness is a little more than a foot tall. Just trying to decide if I need to look at low profile box spring but can't really see what value it adds given it's very hard surface. Seems to me that it only raises the mattress and no additional benefit to the feel or performance. Appreciate your help.

The problem is mattresses these days are designed to work on a rigid surface. If you put a mattress designed for a rigid surface (especially a foam mattress) on a boxspring with actual springs in it, the mattress won't feel the same and the warranty is void. Additionally, even if the boxspring is more durable than a mattress, 17 years is a really long time to use a boxspring every night. It will wear out eventually. Even if it isn't worn out now, if you keep this mattress 10 years, it'll be on 27 year old boxsprings by the end of it.

My husband and I have a 17 year old box spring with springs in it (part of our old, top-of-the-range Duxiana bed) with a different mattress on it (we got rid of the dux mattress several years ago). For a long time we thought that the idea of having to buy a new box spring with every mattress was a scam - the Dux box spring is pristine and clean and we didn't think that the springs in the box spring wore out, because the mattress really rests on the hard wooden edge surrounding the box spring, and doesn't seem to use the springs the same way as they are used in a mattress (meaning, weight lying directly on the springs in particular places) - it seems they more generally distribute the weight, and therefore shouldn't need replacing often. What's the problem, on your view, of keeping an old spring box spring unit. What happens to them over time, and how do we know it happens? How can you tell when an old style box spring needs replacing? Thanks for a great website! I found it bc we are thinking of getting a foam mattress.

I wouldn't recommend it since it will add a lot of extra weight to the bottom boxspring and just adds an extra point of failure to the set. If you're using a regular bed frame, there are things called bed risers which might help raise it up. That's the simpler way to go.

I just bought a mattress and box spring but it is lower to the ground than I like. Can I use 2 box springs? It is full size.

Thank you, that makes sense

That should be fine, as long as the slats are fairly wide and sturdy.

Hello, I just bought a vintage teak bed frame. It doesn't have slats or any support, so I was going to go measure and buy some slats for it at the hardware store. Will I need a box spring if I have impromptu-but-secure slats less than 2" apart? Thank you in advance

No, they're unrelated. In fact, it usually makes sense to just buy either a low profile frame or a low profile boxspring.

Do I have to buy a low profile box spring for a low profile bed frame?

That's actually fine. It's better than the other way around (a king mattress on a queen boxspring). The queen mattress on the king foundation will be properly supported, it'll just be tougher to get into bed on the side the box overhangs.

Is there any issue with putting a queen mattress on a king size slatted platform for short term (~3 nights)? Our new bed is here, but our mattress is not due for a few more days. We'd like to get the bed set up on the weekend but would then need to sleep on it on our queen mattress until the new one gets here. Mostly concerned with whether this is bad for the slatted platform. Thanks!

Ideally it should be exactly the same, but it depends on whether the boxspring used was rigid, and whether the platform has a solid surface (or has slats that are close enough together).

Is there a difference in comfort when switching from a metal frame with box spring to a platform bed with no box spring (same mattress)?

My daughter is moving into an apartment with a small loft area, just big enough for a full size mattress, not a bedframe. Is it OK to put a mattress directly on the floor, or what is the best system to use in this type situation? Thanks.

Yes, there are some. A lot of storage platform beds are really high off the ground. Here are some examples: Concord at Wayfair Aspen Home Sleigh Storage Bed at US Mattress And here's a bunch of different options at Overstock.com.

are there platform beds that are higher off the floor than 10 or so inches? Or in order to achieve height do you have to go with a box spring and a bedframe?

Thanks for asking. Something like this on Amazon would be a decent option. I don't have any personal experience with it, but it looks like it should be sturdy and it gets good reviews. If you want one that is as strong as possible, you can find a Tempurpedic foundation at any retailers that sell Tempurpedic, but it'll run you about $400 for the cal king. I'm not finding any online retailers that sell just the foundation without the mattress.

Any suggestions on a decent foundation to put under a Leesa mattress on a traditional (non-platform) bed?

Height is the only problem. It shouldn't damage the platform. If you haven't already taken delivery of your mattress, you might consider switching to a low profile boxspring.

I have already purchased a new queen Tempurpedic matress and boxspring, but put off looking at bed frames until now. I really like the idea of the storage under the bed instead of a dresser. Will it damage the platform frame at all if I put the boxspring and matress on it? Height is not really a concern. Thank u.

You can always add a boxspring to a platform bed, but a full-size boxspring might make it too high. So, a low profile boxspring will raise the mattress about 4-5 inches while keeping the mattress supported.

My new Leesa is a shorter height than mattress the mattress we had before. We have a slatted platform bed. Can you recommend anything we can add to the platform to raise the mattress from the bottom?

I need a Twin Extra-Long mattress for my son. Do all the selection criteria you listed for queen beds still apply to twin beds? I need a sturdy long lasting twin extra long mattress for my son who weighs 200 lbs. and is 6 feet tall. what would you suggest? Thank you in advance.