What is a Mattress Foundation?

A mattress foundation is a sturdy support system that sits beneath your mattress to keep it level, strong, and feeling great night after night. It helps distribute weight evenly, enhances comfort and support, and extends the life of your mattress. Because when you invest in better sleep, you want it to last.

Do I Need a Foundation for My Mattress?

Always. But that depends on your current setup. Big Fig Mattresses are designed to work as part of a complete sleep system—and the foundation plays a key role in delivering long-lasting support and comfort. You don’t need a mattress foundation if you already have: A platform bed A bed frame with sturdy wood slats and built-in support A mattress foundation that supports at least 1,220 lbs An adjustable bed frame Plans to place your mattress directly on the floor Bottom line? If your setup doesn’t offer solid, evenly spaced support across the entire mattress, a foundation is your best bet.

What Types Of Mattress Foundations And Bases Does Big Fig Offer And What Are Their Benefits?

Big Fig offers a variety of mattress foundations, bases and frames—each built to support bigger bodies, enhance comfort and extend the life of your mattress. Heavy-Duty Foundation: Our classic mattress foundation engineered for serious support. Built from high-quality wood and rated to hold up to 2,000 lbs, this option pairs with a bed frame to create a stable sleep surface that won’t sag. Ultra-Low Profile Foundation: Ideal for those who want a lower bed height without sacrificing support. This sturdy foundation offers the same heavy-duty construction as our heavy-duty version but sits closer to the ground for easier access in and out of bed. Adjustable Base: Offers customizable comfort with a wireless remote and preset positions like anti-snore and zero gravity. It's a great choice to relieve pressure points, ease pain, align your spine and for sleep partners with different comfort preferences. Platform Bed: A modern, minimalist option made from sustainably sourced and repurposed hardwood that supports up to 2,000 lbs—no box spring or foundation required. This sturdy platform bed combines sleek design, tool free assembly with powerful support. Bed Frame: Built from recycled railroad steel, this heavy-duty frame is smartly designed to support your Big Fig Mattress and Foundation. It’s tough, stable and made to last. No matter which option you choose, Big Fig ensures maximum durability, long-lasting support and a better night’s sleep—especially for plus-size sleepers.

What Are The Benefits Of Using A Mattress Foundation?

A good foundation gives your bed the backup it deserves. It boosts support, improves airflow and helps keep your mattress in top shape for the long haul. It also enhances overall comfort and helps protect your warranty. In short: Your sleep gets better, your mattress lasts longer and everything stays exactly where it should.

Can A Foundation Affect My Mattress Firmness?

A foundation won’t change your mattress’s actual firmness level, but it can affect how it feels. The right foundation offers the right kind of support, which can make your mattress feel more stable or more responsive depending on your setup. So, if your sleep feels off, switching up your mattress foundation might just be the comfort fix.

Are There Weight Restrictions for Big Fig’s Mattress Foundations?

The Big Fig Foundations are rated to hold up to 2,000 lbs, which is 5X more than your average foundation. Whether it’s you, your partner, pets, kids or an epic pile of laundry—our foundations are built for the challenge and dare you to add more.

Can I Use Another Company’s Foundation Or Bed Frame?

We highly recommend using our foundations and frame because we know they provide the perfect support for the Big Fig. However, using our foundation and frame isn't required. You can use your existing accessories, like your own box spring, foundation and/or frame as long as it meets the following warranty requirements: Foundation, box spring and/or frame must have proper weight capacity to accommodate the collective weight of mattress and sleeper(s) Slatted bases/box springs must have a minimum of seven (7) rigid cross slats or a maximum distance of two (2) inches between slats Bed frames must have a rigid center support (running from head to foot) and at least five (5) support legs that make contact with the ground

What Is The Difference Between A Base And Mattress Foundation?

A mattress foundation is a rigid support structure—typically made of wood or metal slats—designed to sit beneath your mattress to provide consistent, even support. It works with a bed frame to help extend mattress life. Big Fig offers a Heavy-Duty Foundation and an Ultra-Low Profile Foundation. A mattress base, usually refers to a standalone support system, like an Adjustable Base or Platform Bed. These bases can either stay flat like a platform bed or move and flex like an adjustable base, which gives you more control over your sleep position. In short: A foundation is sturdy and static, usually paired with a bed frame. A base can be flat or adjustable and often replaces the need for both a foundation and frame. Big Fig offers both, so you can choose the support system that best fits your sleep style.

Is A Box Spring The Same Thing As A Foundation?

While the terms ‘box spring’ and ‘mattress foundation’ are sometimes used interchangeably, they’re not the same. A traditional box spring contains actual metals springs and is designed to flex and absorb shock. A foundation under your mattress, like our Heavy Duty Foundation or Ultra Low Profile Foundation, provides a solid, non-flexible base made from durable wood. This type of foundation offers better support and stability, especially for hybrid mattresses and plus-size sleepers. If you’re using a high-quality mattress like Big Fig, a sturdy foundation is the best choice to prevent sagging and extend the lifespan of your mattress.

Upgrade your sleep with Big Fig’s platform bed, bed frames, bases, and mattress foundations for a restful night and lasting mattress support.

Traditional & Adjustable Bases, Frames & Foundations

MATTRESS FOUNDATIONS BUILT TO GO ALL NIGHT

(AND ALL DAY)

Big lives need big support, and Big Fig foundations are built to carry the weight. Whether you're catching Zs or deep into “just one more” episode, these foundations, frames and bases dial up the support and comfort while extending the life of your Big Fig mattress.

Good Sleep Starts With A Good Foundation

Mattress foundations and bases are the unsung heroes of your whole sleep situation. Options from Big Fig are built to support your neck, back, joints, muscles, curves—and come stacked with a whole lineup of perks to support your mattress.

Lifetime Warranty

120 Night  Sleep Trial

Made In  The USA

Free Shipping  & Returns

Put Your Mattress On A Pedestal (Literally!)

EXTEND THE LIFESPAN OF YOUR MATTRESS

Whether you’re all about that classic foundation, loving the low-key look of a platform bed or need something that rises to the occasion like an adjustable base—Big Fig’s got options. Because this is where the magic happens, and a supportive foundation should be part of the show.

Heavy Duty & Ultra Low Profile Mattress Foundations

Whether you want a strong foundation under your mattress or one that lowers the bed height to match your style (or make getting in and out easier), Big Fig’s got you. No wrong choices here—just two rock-solid ways to upgrade your sleep life from the floor up.

The Ideal Setup For:

Heavy Duty – Couples, co-sleepers and anyone who needs serious strength—with bonus room for under-bed storage.
Ultra Low Profile – Fans of a low-profile bed, and people who like their bed easy to get in (and out) of.

Compatible with:

All Big Fig Mattresses in any size.

Mattress Foundations & Bed Frames

These foundations and bed frames don’t just show up. They show off. From sleek to stacked, they bring bedrock energy.

Big Fig's Heavy Duty Mattress Foundation Fits All The Right Mattress Sizes, Including Twin, Twin XL, Full, Queen, King, and California King.

Big Fig Heavy Duty Foundation

Supports up to 2,000 lbs
20-year warranty
100% European SPF

Comfort

Firmness

Queen$399.00

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Big Fig Ultra Low Profile Foundation

Supports up to 2,000 lbs
Pre-assembled for easy installation
Crafted in Cleveland

Cooling

Comfort

Firmness

Queen$379.00

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Big Fig Heavy Duty Metal Bed Frame Is Used With One Of Our Mattresses & Foundations To Make The Magic Happen.

Big Fig Bed Frame

Smart leg design that stabilizes on uneven surfaces
Supports up to 2,000 lbs
Gets stronger as weight is applied

Firmness

Comfort

Queen$249.00

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Platform Beds & Adjustable Bases

From handcrafted hardwood to remote-controlled lounging, our platform beds and adjustable bases didn’t just understand the assignment—they showed up with extra credit.

Big Fig's Solid Wood, Sturdy Platform Bed Combines Repurposed Hardwood, Japanese Joinery, And 2,000 LBS Of Support For Minimalist Style With Maximum Strength.

Big Fig Platform Bed

Supports more than 2,000 lbs
Space-saving, low-profile design
Lightweight and highly durable

Firmness

Design

Coffee / Fabric$2,549.00

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Big Fig Adjustable Base

Supports up to 1,250 lbs
10-year limited warranty
Quick and easy to assemble

Flexibility

Firmness

Queen$1,149.00

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Big Fig's Mattress Foundation Bedding Bundle And Save

Bundle & Save

Mattress. Foundation. Bedding. Boom.

Go big and get it all. A Big Fig mattress, a rock-solid foundation and premium bedding—bundled up, priced down and ready to change your sleep game forever.

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They Love Us. They Really Love Us!

I absolutely love this foundation! I am disabled and cannot climb up into a bed. This foundation is absolutely perfect. It is sturdy and when they say ""ultra low"", they are not kidding. It is absolutely perfect for me.

Alex And Ana's Pitbull Brad Loves Big Fig's Classic Mattress

Karen W. Verified Buyer

Big Fig Ultra Low Profile Foundation01/10/25

Very easy to put together. Length is great, mattress fit great and the height is just right. My husband has health issues and needs the height to get our of bed easier.

Bruce O.Verified Buyer

Big Fig Adjustable Base01/10/25

We went back and forth about whether this was worth it or not. We are so glad we ended up going with this platform bed! It's perfect. Super easy to assemble, sturdy and very comfortable. When paired with the Big Fig mattress, it's the perfect height so I can roll out of bed, which I love. That also means it has solid under-bed space for storage. 10/10!

All of The Fielder Family Is Very Comfortable On Big Fig's Luxe Mattress

Celete K.Verified Buyer

Big Fig Platform Bed01/10/25

We're on a budget, so really didn't want to spend for the foundation, but our last expensive mattress didn't hold up like it should have, so we suspected the standard foundation was a contributor to its demise. So glad we got this foundation! It is rock-solid and will last forever, so one may as well start enjoying it now. No doubt, it will pay for itself again and again...

Zach Miko Is Lying Comfortably On Big Fig's Luxe Plush Pillow Top Mattress.

Jeff R.Verified Buyer

Big Fig Heavy Duty Foundation01/10/25

High quality, very solid foundation. The length is perfect. Brilliant design that is easy to assemble.

The Todd Family Loves That Big Fig Classic Cooling Mattress Is Made With More Support, Durability And Comfort For Bigger, Heavier Bodies.

Andrew G.Verified Buyer

Big Fig Ultra Low Profile Foundation01/10/25

I am a plus sized women and this foundation is perfect for me. My bed doesn't creek and crack when I get in or when I turn over and such. I am very pleased with it!

Ana And Alex Relaxing On Big Fig's Classic Mattress

Diana I.Verified Buyer

Big Fig Metal Bed Frame01/10/25

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Frequently Asked Questions

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BUILD ON YOUR FOUNDATION

Mattresses

You can’t build a throne without a crown. Don’t forget the main event: Your Big Fig Mattress. Built with breathable comfort and firm support that makes other mattresses cry into their coils.

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Bundles

Get everything you need in one bundle—a Big Fig mattress, a supportive foundation and premium bedding for the best sleep of your life.

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Save More With Big Fig By Building A Bundle

Bedding

Finish off your Big Fig mattress with a body-contouring topper, cooling sheets, body pillows—and more essentials for more comfortable nights.

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