Trundle Bed Design & Functionality

A trundle bed is a two-in-one sleeping arrangement—one main bed with a secondary bed tucked underneath. The lower bed rolls out on small wheels, allowing for extra sleeping space without taking up additional floor area. It’s commonly found in children's rooms, guest spaces, and small apartments where maximizing square footage is a priority.

Most trundle beds feature a low-profile bed frame, often made of wood or metal, and a thinner mattress (usually 6–8 inches thick) to fit beneath the main bed. 

Some use slatted supports, while others rely on a platform-style base. The mobility of the lower bed depends on small wheels or casters, making it easy to slide in and out.

Since trundle beds sit close to the floor, they pair well with memory foam mattresses, which offer a balance of comfort and support without excessive height. For those needing extra sleeping capacity without permanent space loss, a trundle bed offers a practical, cost-effective solution.

Types of Trundle Beds

Not all trundle beds function the same way. Some roll out and stay low, while others rise to match the main bed’s height. Others swap the extra mattress for built-in storage. Each type caters to different needs, whether it’s for kids, guests, or small spaces.

Standard Trundle Bed

A standard trundle, like this beige twin trundle bed, stays low to the ground and slides out when needed. It’s a simple design—practical and easy to use. The frame is usually metal or wood, with wheels or casters for smooth movement.

• Mattress size: Typically twin, no thicker than 6–8 inches.

• Frame: Minimalist, built for easy storage.

• Best for: Guest rooms, sleepovers, and multi-purpose spaces.

This type works well for temporary sleeping arrangements but isn’t ideal for daily use. Because it sits low, getting in and out can be tricky for older guests. But if space is tight, it’s an affordable, no-fuss solution.

Pop-Up Trundle Bed

Unlike standard models, a pop-up trundle raises to match the height of the main bed. This means it can function as a king-size bed or two separate twins. The frame is usually metal, with foldable legs that lock in place when extended.

• Mattress size: Twin, must fit within storage height limits.

• Frame: Metal with spring-loaded legs or locking supports.

• Best for: Guest rooms, vacation homes, and flexible sleeping setups.

Pop-up trundles provide more comfort than standard versions, but stability varies. Some models shift slightly when joined, so checking the locking mechanism is essential. It’s a great option for occasional use but may not be sturdy enough for daily sleeping.

Trundle with Storage

Some trundles ditch the second bed for storage. Instead of pulling out a mattress, these designs feature drawers for linens, clothes, or toys. They function more like built-in under-bed storage.

• Storage options: Large drawers, sometimes open shelving.

• Frame: Usually wood, matching standard bed frames.

• Best for: Kids’ rooms, small apartments, or anyone needing extra space.

Since it replaces the mattress, this design isn’t for overnight guests. But for those prioritizing organization over sleeping arrangements, it’s a smart alternative. It maximizes space without sacrificing functionality.

Bunk Bed with Trundle

A bunk bed with a trundle combines three beds in one. Two stacked sleeping areas sit above a pull-out trundle, making it ideal for shared rooms.

• Sleeping capacity: Three beds, typically all twin-size.

• Frame: Sturdy wood or metal, built for durability.

• Best for: Siblings, shared bedrooms, or vacation homes.

This design works well for maximizing space but requires a thin mattress for the trundle to fit properly. It’s a great solution for growing families or frequent sleepovers, offering flexibility without taking up extra floor space.

Space-Saving Benefits

Image: Aysun Upholstered Daybed with Trundle

A trundle bed makes the most of a room’s space. Instead of taking up valuable square footage, it stays tucked away until needed. It’s an efficient way to keep a home organized without sacrificing comfort.

Great for Multi-Use Rooms

Some rooms need to do double duty. A home office, playroom, or small guest space doesn’t always have room for a permanent bed.

• Folds away: A trundle slides under the main bed, keeping the room open.

• Quick setup: Just pull it out when guests arrive—no need for air mattresses.

• Discreet design: Blends in with standard bed frames, avoiding bulky furniture.

For those who don’t want a bed taking over their space, a trundle keeps things neat. It’s there when needed, invisible when not.

Perfect for Kids’ Sleepovers

Kids love sleepovers, but extra beds take up space. A trundle solves that problem by offering a second mattress without a bulky bunk bed.

• Safe for younger kids: No high climbing, unlike bunks.

• Compact storage: Rolls under a standard twin or full bed.

• Quick to use: No assembly—just pull it out.

Parents get peace of mind, and kids get a cozy setup. It’s a win for everyone.

More Cost-Effective

A trundle bed replaces the need for two separate beds. It’s a budget-friendly option that works just as well as traditional setups.

• No extra bed frame: Saves money on furniture.

• Dual-purpose design: Works as a single bed most of the time.

• Lasts for years: Sturdy frames and quality mattresses hold up well.

For anyone looking to save space and money, a trundle bed is an easy solution. It offers practicality without extra cost or clutter.

Challenges & Limitations

A trundle bed saves space, but it comes with trade-offs. From mattress thickness to mobility, a few limitations might make it less than ideal for everyday use.

Thinner Mattresses

Most trundle beds require a mattress between 6 to 8 inches thick, which is much thinner than a standard 10 to 14-inch mattress. This restriction affects comfort, durability, and support.

• Firm sleeping surface: Less cushioning can make the mattress feel harder.

• Limited variety: Memory foam or hybrid mattresses often come in thicker sizes, reducing options.

• Durability concerns: Thinner mattresses compress faster, meaning they might not last as long.

For occasional guests or kids’ sleepovers, this isn’t a huge issue. But for adults who plan to use it regularly, a high-quality, dense foam or latex mattress is the best choice. Otherwise, discomfort could set in after just a few nights.

Weight Restrictions

Trundle beds aren’t built for heavy sleepers. Most models support 250–300 lbs, which is fine for children and smaller adults but might not be enough for everyone.

• Frame durability: Lightweight materials like particleboard or hollow metal can bend over time.

• Pop-up risks: If the trundle lifts to full bed height, the legs may wobble under excess weight.

• Shorter lifespan: Frequent use by heavier individuals may wear down the frame and mattress more quickly.

Some high-end trundle beds have reinforced steel frames, raising the weight capacity to 400+ lbs. If the bed will see daily use, investing in a sturdier frame makes a big difference.

Hard to Roll on Thick Carpets

A trundle is designed to slide out easily, but thick carpets can turn that simple motion into a struggle.

• Wheels get stuck: Plush carpeting creates friction, making movement difficult.

• Uneven positioning: A trundle might not roll out straight, causing misalignment.

• Requires lifting: Instead of smoothly pulling it out, users may have to manually adjust the frame.

For homes with deep-pile carpets, choosing a trundle with larger caster wheels helps. Otherwise, placing a hard floor mat under the bed can provide a smoother surface for rolling.

Low to the Ground

The lower bed sits just 5 to 8 inches off the floor, which isn’t ideal for everyone. While this design saves space, it has some downsides.

• Cold air exposure: Sleeping near the floor can be chilly, especially in winter.

• Harder to get up: Those with knee or back issues may struggle to stand from such a low position.

• Dust accumulation: Beds closer to the ground tend to collect more dust and allergens.

For everyday comfort, a pop-up trundle is the better choice. It raises to full bed height, offering a more traditional sleeping experience while still keeping the extra bed hidden when not in use.

Best Use Cases

Image: Camello Twin Solid Wood Daybed with Trundle

A trundle bed isn’t just a backup sleeping option. It’s a flexible, space-saving solution that works in a variety of settings—whether for kids, guests, or vacation homes.

Children’s Rooms

Kids’ bedrooms rarely have extra space for a full-sized guest bed. A trundle bed or bunk bed with futon provides a hidden sleep surface for sleepovers, siblings, or overnight guests without cluttering the room.

• Easy to pull out: Most models roll smoothly on caster wheels.

• Safer than bunk beds: No ladders, no risk of falling from the top bunk.

• Grows with the child: Can be used for toddlers, then transition into a guest bed later.

Since trundle mattresses tend to be 6–8 inches thick, choosing a medium-firm option helps provide enough support for growing kids without being too stiff.

Guest Accommodations

Not everyone has a dedicated guest room. A trundle bed offers an extra sleeping space that stays out of sight until needed.

• Ideal for home offices: Turns a workspace into a part-time bedroom.

• Great for last-minute visitors: A quick setup without needing an air mattress.

• More comfortable than a sofa bed: No metal bars or awkward cushions.

For guests who need extra support, pairing the trundle with a high-density foam mattress can improve comfort without taking up extra storage space.

Small Apartments

Living in a studio or one-bedroom apartment means making the most of every square foot. A trundle bed maximizes sleeping space while keeping the room functional during the day.

• Fits under daybeds or sofas: Doubles as seating and a sleep space.

• No need for bulky frames: Uses the same footprint as a regular bed.

• Easier to move than two separate beds: Lighter and more compact.

In smaller living spaces, a trundle with storage drawers can provide additional room for linens or seasonal clothing—helping to reduce clutter.

Vacation Homes & Rentals

Whether it’s a beach house, cabin, or Airbnb, a trundle bed like this wooden bunk bed with trundle and ladder allows hosts to accommodate more guests without sacrificing space.

• Increases sleeping capacity: Turns a twin bed into a double.

• Great for kids and adults: Pop-up models can create a king-sized bed.

• Compact and easy to maintain: No need for extra bed frames.

For short-term rentals, opting for a sturdy metal frame with a pop-up design ensures durability while offering flexible sleeping arrangements for different guest needs.

Trundle Bed vs. Other Space-Saving Beds

Trundle beds aren’t the only space-saving sleep solution. Here’s how they compare to other popular options:

Bunk Bed vs. Trundle Bed

Bunk beds are a classic, especially for kids, but they’re not quite as flexible as a trundle bed. A bunk bed is a permanent two-bed solution, stacking one bed above the other. While that works for siblings or families with multiple children, a trundle bed offers more versatility.

• Bunk beds can feel cramped, especially for older kids or adults.

• A trundle bed, on the other hand, rolls out when you need it.

• Bunk beds need more floor space for both beds, whereas a trundle can stay hidden.

In terms of cost, bunk beds often come at a higher price point due to their sturdy frames, especially for metal or wooden models. A trundle bed, however, offers a lower cost and a less permanent solution—ideal for guests or infrequent use.

When thinking of long-term use, bunk beds might be the go-to, but trundle beds work better for space and occasional use.

Murphy Bed vs. Trundle Bed

Both Murphy beds and trundle beds are great for saving space, but they do it in different ways. A Murphy bed folds up into the wall, providing vertical storage. That saves floor space, but it’s a one-time setup—you have to unfold it every time you need it.

• Murphy beds are excellent for tight rooms or studios.

• Trundle beds are a bit more straightforward, offering an extra bed that rolls out without needing to attach to the wall.

• Murphy beds tend to be more expensive (especially if you need the wall-mounted system).

But for quick, easy access, trundle beds might be a better bet. They're simple—just pull the lower bed out. Plus, with trundle beds you still have access to the floor space, while Murphy beds hide everything away.

If space-saving is your main concern, a Murphy bed might suit better. But, for ease and flexibility, the trundle bed offers more day-to-day practicality.

Sofa Bed vs. Trundle Bed

A sofa bed (or futon) is a well-known space-saver, but it’s not always as comfortable as a trundle bed. Sofa with sleeper bed serves two purposes: seating during the day and sleeping at night. But that means the mattress isn’t always great for long-term sleep.

• Sofa beds tend to be lumpy or have thin mattresses that lack support.

• A trundle bed, however, offers a dedicated sleeping space that’s probably more comfortable.

• Sofa beds also take up a bit more room even when folded.

But sofa beds do have the upper hand if you need something that serves as both a seat and a bed. They’re especially good in small apartments or living rooms where a single piece of furniture needs to pull double duty.

In the battle of comfort, though, trundle beds win. They provide a dedicated sleep space, while sofa beds try to do too much.

How to Choose the Right Trundle Bed

Picking the right trundle bed depends on size, materials, and extra features. Here’s what to consider:

Size Matters

When choosing a trundle bed, size is one of the most crucial factors. A trundle bed’s dimensions determine how much space it’ll take up and how comfortable it’ll be when pulled out. Most trundle beds come in twin or full-size options, though there are some that cater to queen sizes.

• Twin-size trundles fit better in smaller rooms, especially if you have limited floor space.

• Full-size trundles are ideal for larger rooms or for those who want extra room to sleep.

It’s a good idea to measure the available floor space before buying. (That way, you don’t end up with something that’s too big or too small.) The trundle needs to be able to roll out easily without hitting the walls or other furniture.

If you’re in a smaller space, a twin-size might be a better option. For extra sleep capacity, though, the full-size will do.

Frame Material

The material of the trundle bed’s frame plays a big role in its durability and price. Here’s how to break it down:

• Wood frames are the traditional choice—strong and sturdy but a little heavier.

  • They tend to be pricier and can add weight to the bed. Still, wood looks good in most rooms.

• Metal frames are lighter and often more affordable.

  • They’re durable, too, though they might not have the same “warmth” as wood.

Choosing between the two often comes down to style and budget. Wood frames tend to be more stylish and “classic,” but if you’re looking for something light, metal frames might fit better.

The frame’s material affects both the overall look and the weight of the trundle bed, so make sure to factor that in when making a decision.

Mattress Compatibility

The mattress you choose for a trundle bed makes a huge difference in comfort. Most trundles work best with a 6–8 inch thick mattress, so it’ll fit under the main bed when stored. Going with something thicker might make it hard to pull the trundle out or store it easily.

• Memory foam mattresses are a popular choice for trundle beds. They provide comfort but aren’t too bulky, which is key for fitting in tight spaces.

• If comfort isn’t a big issue (maybe it’s just for occasional use), a thinner mattress might work.

A trundle mattress that’s too thick can make the lower bed feel too high off the ground, which may be uncomfortable. A thinner but still supportive mattress, like memory foam, is the best option for comfort and space.

Make sure to pick a mattress that fits the frame and offers a comfortable night’s sleep.

Additional Features

Some trundle beds come with extra features that can add convenience and functionality. Here’s what to look for:

• Storage drawers can help with organizing clothes, bedding, or toys.

• Pop-up mechanisms let you raise the trundle bed to the same height as the main bed for a more comfortable sleeping experience.

• Built-in headboards are sometimes included, making the bed look more like a traditional one.

While these features can add to the cost, they can also make a trundle bed feel more like a full-sized bed. If you need extra storage or want to make the sleeping surface a bit more comfortable, consider these options.

The pop-up feature is especially handy for frequent use, but it might add a little to the overall price.

Maintenance & Care Tips

Image: Emareon Wooden Space Saver Daybed with Trundle

Trundle beds are low-maintenance, but a few simple habits can help them last longer:

Keep the Under-Bed Space Clean

A trundle bed can quickly collect dust and dirt, especially under the bed. It’s easy to overlook, but that space under the trundle needs attention. Regular cleaning (vacuuming, mostly) helps prevent the buildup of dust, pet hair, and other debris.

• Vacuum the under-bed area weekly to keep things fresh.

• Use a microfiber cloth to wipe down the wheels and any exposed metal or wood parts.

Dust and hair can cause the trundle to get stuck or make the whole setup feel grimy over time. So, don’t skip this. Keep it clean, and the trundle bed will keep rolling smoothly.

Sometimes, even just a quick sweep can make a big difference. If you can, pull it out and clean underneath it regularly to avoid hidden buildup.

Use a Mattress Protector

Trundle beds are pretty close to the floor, which makes them more vulnerable to dirt and spills. A mattress protector can help a lot. Not only will it keep the mattress cleaner for longer, but it can also extend the life of the bed itself.

• Waterproof protectors work well to prevent any accidents from soaking into the mattress.

• Breathable fabric covers help avoid moisture buildup, which could lead to mold or mildew.

These protectors are cheap insurance against messes and accidents. They’re especially helpful if kids or pets are involved. Consider a machine-washable one, so cleaning is quick and easy.

It’s just one extra step to protect your investment—no one wants to deal with a stained or worn-out mattress.

Check Wheels and Casters

The wheels (or casters) on a trundle bed need regular attention to make sure they keep rolling smoothly. Over time, wheels can get stuck or start to loosen. If that happens, the trundle bed might not slide out as easily, and that can lead to bigger problems down the road.

• Check wheels for dirt or debris that might block the casters from moving freely.

• Tighten any loose bolts to keep everything in place.

Sometimes, just a little oil (like WD-40) can make a big difference. But be careful not to use too much—it’s not a free pass to skip maintenance. Just ensure that everything works smoothly.

The smoother it moves, the longer it lasts.

Don’t Exceed Weight Limits

Every trundle bed has a weight limit, and going over it can be a problem. If the bed is used for heavy sleepers or people who move around a lot, that extra weight can strain the frame, causing wear and tear.

• Check the weight capacity listed by the manufacturer.

• Consider using the trundle bed for occasional guests, not as a daily sleeper for someone who exceeds the limit.

Though trundle beds are pretty sturdy, consistently using them for heavier loads can lead to frame damage or issues with the wheels. It’s best to know the limits and follow them.

By being mindful, you can avoid unnecessary wear and keep the bed functioning properly for years.

Final Thoughts

A trundle bed is a smart, space-saving alternative to traditional beds, offering extra sleeping space without cluttering a room. With multiple styles—standard, pop-up, storage, and bunk bed trundles—it caters to different needs, from guest accommodations to kids’ sleepovers.

While it has limitations, like thinner mattresses and weight restrictions, its advantages—affordability, flexibility, and ease of use—make it a practical investment for small spaces.

Looking for a budget-friendly alternative to that high-end bed frame? Simply paste the item’s URL into Dupe and find stylish, wallet-friendly options in seconds.

FAQ

What is a trundle bed and how does it work?

A trundle bed is a bed underneath the main bed, designed for extra sleeping space when needed. It’s perfect for small bedrooms or studio apartments, where extra bedding and a comfortable sleeping solution are a priority. The twin trundle bed often slides out from under a standard bed, offering a convenient extra bed without taking up too much space.

What types of trundle beds are available?

There are several types of trundle beds, such as the twin trundle bed, full trundle, and bed trundle. Some trundle beds even come with built-in drawers for additional storage. The best trundle for you depends on your space, whether you need a full-size or twin-size bed, and how often you’ll use it.

Can a trundle bed be used with any mattress?

A trundle bed is usually compatible with mattress guides that recommend twin size or full sizes for a good fit. While you don’t always need a box spring, the type of mattress you choose—like a hybrid mattress or puffy mattress—can affect your comfort level. Just keep in mind that some models don’t allow mattresses sold separately to work without modification.

Is a trundle bed good for three people?

A trundle bed is usually designed to accommodate two people, though some types of trundle beds can hold three people. It’s ideal for children who share rooms or guest bedrooms where occasional additional sleeping space is needed. For more comfort level, consider a mattress review to choose the best mattress for your trundle.

Can a trundle bed be used in a small bedroom?

Yes, a trundle bed is perfect for a small bedroom, especially if you need extra bedding or sleeping space without cluttering the room. Trundle beds are great in studio apartments or for rooms where space is limited. You can opt for a twin trundle or a platform bed if you need something lower to the ground for more space.