Bed Trundle – Complete Guide to Sizes, IKEA and Safety

What is a Trundle Bed? Definition and Core Concept

A trundle bed is a standard bed frame with a second, lower bed stored underneath that can be pulled out when needed. It is a space-saving solution designed for children’s sleepovers, guest rooms, and small apartments.

The concept is centuries old, but modern versions are typically low-profile, wheeled units that slide under a main bed. The term “trundle” comes from the wheels or casters that allow the lower bed to roll out.

Unlike a sofa bed or daybed, a trundle bed remains a dedicated sleeping surface even when not in use, though the lower mattress is often thinner and less supportive than a regular mattress.

• Trundle beds are primarily sold as space-saving solutions but rarely include high-quality mattresses, creating a common secondary purchase need. – Market observation from top SERP results
• The term ‘trundle bed’ is often confused with ‘daybed’ and ‘guest bed,’ leading to search friction. – User query analysis
• IKEA’s ‘bed trundle’ search suggests users are looking for separate under-bed rolling units, not just full beds. – API question data
• IKEA UK does not sell true trundle beds; their day beds (e.g., HEMNES) function as trundle beds with a pull-out sleeper. – IKEA UK product range
• UK standard single mattresses (90×190 cm) do not fit IKEA trundle frames, which require 80×200 cm. – IKEA mattress size guide

Trundle Bed Sizes: Single, Double, Queen, and Under-Bed Options

Mattress size is the most critical factor when buying a trundle bed. Unlike a standard bed, the lower mattress must fit within the frame’s pull-out mechanism, which often has non-standard dimensions.

What is the difference between a double bed trundle and a single trundle bed?

A single trundle bed accommodates one person on the lower bed, typically using a 190 cm × 90 cm (UK single) mattress. A double bed trundle, on the other hand, uses a 190 cm × 135 cm (UK double) mattress for the lower bed, allowing two people to sleep side by side. Double trundle frames are wider and require more floor space when extended.

Is a queen bed trundle available in standard UK sizes?

Queen-size trundle beds exist but are less common. The lower mattress in a queen trundle typically measures 200 cm × 150 cm (UK queen). However, most UK retailers focus on single and double trundle beds because queen trundles require a larger room footprint and are seldom used for children’s rooms. If you need a queen trundle, expect to find it from specialist brands rather than high-street retailers.

IKEA’s size approach

IKEA UK does not sell true trundle beds. Their day beds, such as the HEMNES Day Bed, function as trundle beds but require an 80 × 200 cm mattress for both the top and pull-out sleeping surfaces. This is narrower than the UK standard single (90 × 190 cm), so customers must buy a mattress specifically for IKEA dimensions. According to IKEA’s UK mattress size guide, using a standard UK single mattress in an IKEA day bed trundle will not fit properly due to width and length mismatch.

Who is a Trundle Bed For? Suitability for Adults, Children, and Guests

Is a trundle bed suitable for adults?

Yes, trundle beds can be used by adults, but comfort depends on the mattress thickness and frame quality. Most trundle frames are rated for approximately 100 150 kg per sleeping side. Premium models with thicker mattresses (at least 15 cm) can be comfortable for occasional use by adults. However, trundle beds are generally less comfortable than full‑height beds because the lower mattress often sits directly on a slatted base with less cushioning.

Are trundle beds comfortable for everyday use?

For everyday use, a trundle bed is not ideal for most people. The lower mattress is typically thinner (10–15 cm) and offers less support. Children and light adults may find it acceptable for short periods, but for nightly use, a standard bed with a thicker mattress is recommended.

How much weight can a trundle bed hold?

Weight capacity varies widely. For IKEA’s HEMNES Day Bed, the trundle side is rated for approximately 100 kg (220 lbs) per sleeper, and the entire bed is tested for 136 kg total, according to IKEA’s customer service. For non-IKEA models, capacities range from 100 kg for single trundles to 180 kg for double trundles. Always check the manufacturer’s specifications.

Are trundle beds safe for children?

Trundle beds are suitable for children aged 3 years and older, according to IKEA’s children’s sleep guidelines. For children under 6, the top bunk of a bunk bed is not recommended, but the low trundle is considered safe. Ensure guard rails are present, the mattress fits snugly, and the frame is stable on carpet or hard floors. The UK government’s guidance on buying furniture safely provides additional advice for child‑proofing.

Trundle Bed vs IKEA and Other Retailers: What to Look For

Does IKEA sell trundle beds or bed trundles?

IKEA UK does not sell beds explicitly marketed as “trundle beds.” Instead, they offer day beds such as the HEMNES Day Bed, which functions as a trundle bed with a pull-out under-bed sleeper. The HEMNES is the most popular model and includes three large storage drawers underneath. It requires two 80 × 200 cm mattresses – one for the top and one for the pull-out. IKEA also sells separate trundle units (e.g., STÖRÅ, UTSÄTT) designed for specific bed frames, but their compatibility with non-IKEA mattresses varies.

Do trundle beds come with a mattress?

Rarely. Most trundle beds are sold as frames only, leaving the buyer to purchase the mattresses separately. Some packages may include a thin foam mattress, but quality is often low. It is advisable to budget for two mattresses – one for the main bed and one for the trundle.

What is the best trundle bed for a small space?

For small spaces, a single trundle bed (190 cm × 90 cm frame) or a day bed with trundle (such as IKEA HEMNES) is ideal because it keeps the second bed tucked away during the day. In very tight rooms, consider a low-profile trundle that sits close to the floor, as it requires less clearance when pulled out.

For a broad market overview, consumer testing from Which? provides independent reviews of mattresses and bed frames suitable for trundles.

Trundle Bed Practicalities: Assembly, Mattress Choice, and Setup

How do I assemble a trundle bed frame?

Assembly varies by model. Most trundle frames come with pre-drilled holes and require a screwdriver and allen key. IKEA’s HEMNES Day Bed, for example, includes a slatted base and L-brackets for securing the frame. Always follow the manufacturer’s instructions and tighten all bolts. Health and Safety Executive guidance offers general best practices for assembling low-profile furniture.

Can I put a trundle bed on carpet?

Yes, but with caution. Many trundle frames have wheels that may sink into thick carpet, making it difficult to pull the bed out. If your carpet is deep-pile, consider placing a hard floor protector or plywood sheet under the frame. Alternatively, choose a frame with larger, harder wheels or a gliding mechanism that works on carpets.

How do I make a trundle bed more comfortable?

The simplest upgrade is to replace the standard thin trundle mattress with a thicker, higher-quality mattress (at least 15 cm). A mattress topper can also improve comfort. Adding a supportive slatted base (if not already included) helps prolong mattress life. For guest use, a premium mattress can make the trundle nearly as comfortable as a regular bed.

A Brief History of the Trundle Bed

1. 18th–19th Century: Truckle beds (low, movable beds for servants) were common in European homes. They were often kept under larger beds during the day.
2. 1950s–1970s: Post-war space-saving furniture boomed. Trundle beds became popular in children’s rooms, especially with the rise of sleepover culture.
3. 2000s–present: Modern minimalist and small-space living trends drove mass production of low-profile, wheeled trundle units. Today, they are a staple in compact urban homes and guest rooms.

What We Know and What Remains Unclear About Trundle Beds

The Trundle Bed in Modern Homes

The trundle bed sits at the intersection of space optimization and guest hospitality. While the basic design is centuries old, modern iterations serve two distinct markets: budget‑conscious families needing children’s sleepover beds, and urban adults seeking flexible micro‑living furniture. The lack of standardized mattress thickness across retailers creates the most significant user pain point and search gap. British Standard BS 8502 (children’s beds and bunks) provides a reference for safety, but trundle‑specific standards remain sparse.

What Do Major Retailers Say About Trundle Beds?

“A trundle bed is a regular bed with another bed neatly hidden underneath.”
– time4sleep.co.uk

“A trundle bed essentially turns a normal bed into a 2‑in‑1 bed.”
– happybeds.co.uk

“A trundle bed is a type of bed that consists of a standard bed frame with an additional, slightly smaller bed tucked beneath it.”
– bedkingdom.co.uk

How to Choose the Right Trundle Bed for Your Needs

After reading this guide, you should be able to decide whether a trundle bed suits your space and needs. Check the correct mattress size (especially for IKEA models), assess weight limits, confirm safety for children over 3 years, and budget for two mattresses if the frame is sold without them. For standard UK sizes, look for non‑IKEA brands that accept 90×190 cm single mattresses.

Frequently Asked Questions