Pull Out Sofa Bed: Everything You Need to Know Before Buying

A pull out sofa bed gives you a place to sit during the day and a guest bed when you need one — without dedicating an entire room to it. For flats, home offices, and multi-use living rooms, it's one of the most practical ways to make a space work harder.

Modern sofa beds have improved considerably. Many newer designs skip the metal bar that older fold-out models were known for, replacing it with integrated foam sleep surfaces, simpler conversion mechanisms, and fabrics built for everyday use.

The key question when shopping isn't whether the sofa converts into a bed — all of them do. The more useful question is whether it works well in both modes: as a sofa you'll use every day, and as a place a guest would genuinely sleep well.

Browsing a full range makes it easier to compare sizes, layouts, and conversion types side by side. Start with the Koala sofa bed collection.

What this guide covers:

What Is a Pull Out Sofa Bed?

A pull out sofa bed is a sofa with a hidden sleep mechanism — inside or beneath the frame — that extends or unfolds into a sleeping surface.

The term covers several different designs. Traditional models store a fold-out metal frame and mattress inside the sofa base. Newer designs use integrated foam surfaces or slide-out platforms, which tend to be easier to set up and more comfortable to sleep on.

The range spans compact 2 seater sofa beds suited to a box room right up to large corner sofa beds that fill an L-shaped living room layout. Mechanism type, sleep surface quality, and sofa size vary considerably across the category — making it worth comparing before committing.

Types of Pull Out Sofa Bed

There are six main types of pull out sofa bed, each suited to a different space and use case. The right type depends on how often you'll use the bed, how much room you have, and how quickly you need to set it up.

Traditional fold-out designs often include a separate mattress stored inside the base. They're practical for occasional use, but setup takes longer and the mattress can feel thinner underfoot. Flip-style designs convert the fastest and tend to deliver a more consistent sleep surface because the foam is built in rather than stored separately.

Pull Out Sofa Bed Sizes: UK Guide

UK sofa beds come in single through to super king. The right size depends on available floor space, who'll sleep on it, and how often you'll convert it.

In the UK, sofa bed sleeping surfaces map to standard mattress sizes:

The sofa width label and the sleeping surface dimension are not the same thing. A sofa described as "king" refers to the overall sofa frame width — the actual sleep surface may be different. Always check the product's stated mattress or foam surface dimensions before buying.

For smaller flats, a single or small double tends to work better than a king when open — it takes up less floor space and still gives a comfortable night for one person.

What to Look for in the Sleeping Surface

The sleeping surface is the single most important factor in how comfortable a pull out sofa bed actually feels. A well-designed sofa won't compensate for a poor sleep surface.

Older fold-out designs typically use a thin mattress over a folding metal frame. The most common complaint is feeling the bar or frame through the mattress, especially after a few hours. That said, comfort depends on mattress quality rather than mechanism type alone — a well-made traditional fold-out can still sleep well.

Foam thickness and density

Thicker foam generally means better support, but density matters as much as depth. A 10–15 cm foam layer with good recovery will outperform a thicker but lower-density option.

Look for:

• Even support across the full surface — no dips or ridges

• Minimal gaps between cushions when the bed is open

• No hard pressure points from the mechanism underneath

• Foam that springs back rather than staying compressed

Ease of conversion

A sofa bed that takes effort to set up tends to go unused. Flip-style designs — where you fold the cushions back and the sleep surface is immediately there — are the fastest. Traditional fold-out frames take longer and require unfolding and lifting hardware.

The Koala Sofa Bed uses a flip-style mechanism. The cushions fold back to reveal the sleep surface directly, with no separate frame to handle.

Washable covers

Sofa beds take more wear than a standard sofa because they're both sat on and slept in. Removable, machine-washable covers make a significant difference in busy homes or those with children and pets.

The Koala Sofa Bed includes removable machine-washable covers as standard.

Sleeping comfort vs sofa comfort

The best pull out sofa bed is the one that works well in both modes — comfortable to sit on every day and a place your guests genuinely sleep well.

Are Sofa Beds Good for Your Back?

Whether a sofa bed is comfortable for your back depends on the quality of the sleep surface, not on the fact that it folds away.

A thin mattress over a metal frame can create uneven pressure points that make sleeping uncomfortable, particularly for those who sleep on their side. A high-density foam surface that lies completely flat when open is a different experience.

If support matters, look for:

• A sleep surface at least 10 cm thick

• Foam that doesn't stay compressed when you press it

• A mechanism that lies completely flat with no ridge or gap in the middle

• Full-width support — particularly important on a double or king size

For regular overnight use, a foam-integrated system performs better than a traditional fold-out design with a thin mattress topper.

Sofa Bed Fabric Guide: Choosing for Long-Term Use

Because a sofa bed is used for both sitting and sleeping, the fabric needs to hold up to more wear than a standard sofa. This is worth considering before deciding on a colour or finish.

Removable, machine-washable covers extend the useful life of a sofa bed considerably. If guests will use the bed regularly, this is worth prioritising over a fabric that's harder to maintain.

The Koala Sofa Bed comes with removable machine-washable covers — particularly useful in family homes or homes with pets.

How to Measure Your Space Before Buying

Most sofa beds need significantly more floor space than the sofa footprint alone suggests. The most common buying mistake is a sofa that fits the room as a sofa but blocks all movement once the bed is open.

You need two footprint measurements: the sofa closed, and the bed fully extended.

Start with:

• Wall width — how much space the sofa takes along the wall

• Open depth — the full length the bed extends into the room

• Walking clearance — enough room to move around the furniture comfortably

Most pull out sofa beds need between 200 and 230 cm of depth when open. The Koala Sofa Bed requires approximately 224 cm of depth when fully extended.

For upper-floor flats, always check whether the sofa delivers in sections. Many modern sofa beds have removable legs and split frames specifically to navigate tight stairwells.

For flats, sketch the room to scale and mark out both footprints before ordering. A king sofa bed in a small living room can dominate the space completely when open. A single or small double often works better and still gives a comfortable night.

As a general guide:

• Small flat or studio: single or small double, fast conversion, compact footprint

• Guest room or home office: double or king, prioritise sleep surface depth

• Frequent overnight guests: allow clear walking space on all sides when the bed is open

The Best Pull Out Sofa Bed for Your Situation

The best pull out sofa bed depends on how you'll actually use it. Here's a practical guide by living situation.

Small flats

In a small flat, conversion speed and footprint when open matter more than the sofa size. A single or small double sofa bed preserves usable floor space in a living room when unfolded and still gives a comfortable night to one guest.

The Koala Sofa Bed comes in multiple widths with a flip-style conversion. View the Koala Sofa Bed.

Guest rooms and home offices

If the room is primarily a study or spare room, a double or king sofa bed tends to make more sense. Guests may use the bed for several nights at a stretch, so a deeper, firmer sleep surface is worth prioritising over a smaller footprint.

Machine-washable covers are worth having here too — they make it straightforward to freshen the sofa between guest stays.

Corner sofa beds

A corner sofa bed works well in an L-shaped living room or a larger open-plan space. The seating capacity is higher than a standard sofa bed, and the configuration suits rooms where an L-shaped layout makes better use of the floor space. The trade-off is that the bed section needs more clearance to extend, so measure carefully.

Garden rooms and studios

For a garden room or outbuilding studio, prioritise a performance fabric or treated cover that handles more casual use and temperature variation. Easy-clean covers are particularly helpful in these settings.

Sofa Bed Care and Maintenance

A well-maintained sofa bed will last significantly longer. The mechanism and sleep surface both experience more stress than a standard sofa, so regular upkeep makes a meaningful difference.

• Rotate the foam pad where the design allows — this evens out wear and prevents the foam from compressing unevenly in one spot

• Air the sleep surface after use — folding the bed away while still warm traps moisture, which degrades foam over time

• Wash covers regularly — machine-washable covers should be laundered at least once a season, or after each guest stay

• Check the mechanism every few months — look for stiff points or signs of wear on moving parts; a small amount of furniture wax on metal components helps them move freely

• Spread seating across the full sofa width — repeatedly sitting in the same spot compresses the foam unevenly and shortens its life

Ready to Find Your Pull Out Sofa Bed?

The Koala Sofa Bed comes with a 120-night free trial and free delivery across the UK. It's available in multiple widths, uses a flip-style conversion, and includes machine-washable covers as standard.

Shop the Koala Sofa Bed

Frequently Asked Questions

How does a pull out sofa bed work?

A pull out sofa bed uses a hidden mechanism inside or beneath the sofa frame to create a sleeping surface. Traditional versions unfold a metal frame with a separate mattress; newer systems use integrated foam surfaces or slide-out platforms that are quicker to set up.

What sizes do pull out sofa beds come in?

In the UK, pull out sofa beds come in single (90 × 190 cm), small double (120 × 190 cm), double (135 × 190 cm), king (150 × 200 cm), and super king (180 × 200 cm). Always check the product's stated sleep surface dimensions rather than the sofa width label — they're often different.

Are pull out sofa beds comfortable?

Modern pull out sofa beds can be very comfortable, but it depends on the sleep surface. Foam-integrated systems — where the sleep surface is built into the sofa rather than stored as a separate mattress — tend to perform better than traditional fold-out designs, which use a thinner mattress over a metal frame. The quality and density of the foam matter more than the thickness alone: a well-constructed 10 cm foam layer will generally outperform a thicker but softer option. The mechanism itself matters less than whether the sleep surface lies flat and holds its shape.

What's the difference between a pull out sofa bed and a fold out sofa bed?

The terms are largely interchangeable in the UK. "Pull out sofa bed" and "fold out sofa bed" both describe sofas that convert into a sleeping surface. The meaningful difference is in the mechanism — fold-out frames take more setup time than flip-style systems — and in the quality of the sleep surface once it's open.

How much floor space does a pull out sofa bed need?

Most sofa beds need between 200 and 230 cm of open depth when fully extended. Before buying, measure the sofa width along the wall, the depth the bed extends into the room, and any doorways or stairwells on the delivery route.

For flats, marking the footprint on the floor before ordering makes it much easier to visualise whether the layout will work.

Can you sleep on a sofa bed every night?

Yes, if the sofa bed has a quality sleep surface. A foam-integrated system with a surface at least 10–15 cm thick can support regular nightly use comfortably. A traditional fold-out design with a thin mattress is better suited to occasional guest use.

For regular use, look for a dense foam surface that holds its shape under sustained weight, and check that the mechanism is built for frequent conversion.

What is the weight limit of a pull out sofa bed?

Weight limits vary by model. Most quality sofa beds support between 110 and 150 kg per sleeping position, though this varies by manufacturer. Always check the product specification before buying — particularly if two adults will share the bed. See the Koala Sofa Bed product page for full specifications.

How long does a sofa bed last?

A well-made sofa bed typically lasts 8 to 12 years with regular use. The mechanism and sleep surface wear faster than a standard sofa because both experience more intensive use. Regular maintenance — airing the surface, washing covers, and checking the mechanism — extends the lifespan considerably.

What is the best sofa bed for a small flat?

For a small flat, prioritise a compact footprint, fast conversion (flip-style rather than fold-out frame), and a size that doesn't dominate the room when open. A single or small double tends to work well in rooms under 20 m².

The Koala Sofa Bed is available in smaller widths with a flip-style mechanism. View the Koala Sofa Bed.

Is a corner sofa bed worth it?

A corner sofa bed offers more seating than a standard sofa bed and suits larger L-shaped rooms well. The trade-off is that it needs more clearance when converting to bed mode and can be more difficult to move — worth considering if you're renting. If you have the space and a room that suits a corner sofa layout, it's a flexible option for a living space that also needs to accommodate guests.