Choosing the Right Mattress for a High Sleeper or Cabin Bed
When choosing a mattress for a high sleeper or cabin bed, the key is selecting a depth low enough to clear the ceiling and guard rails while still providing proper support. UK single high sleepers typically need a mattress no deeper than the manufacturer’s stated maximum to keep the top bunk guard rail at least 16 cm above the mattress surface as required by BS EN 747 safety standards.
Why Mattress Depth Matters for High Sleepers
High sleeper beds raise the sleeping platform to create space underneath for desks, storage or seating. This extra height reduces the clearance between the mattress surface and the ceiling. A mattress that is too thick can cause a child’s head to hit the ceiling when sitting up or create a cramped feeling. Similarly, exceeding the bed maker’s maximum depth can leave the top-bunk guard rail too low, breaching the legal requirement that it rises at least 16 cm above the mattress.
Always check the specific high sleeper product page for its stated maximum mattress depth before buying. Most wooden and metal high sleepers sold in the UK are designed for mattresses between 10 cm and 18 cm deep. Thicker adult-style mattresses of 25 cm or more are rarely suitable.
UK Mattress Sizes for High Sleepers and Cabin Beds
High sleepers and cabin beds are almost always built for the standard UK single size. Use these exact dimensions to ensure a correct fit:
| Size | Dimensions | Common Use |
|---|---|---|
| Small Single | 75 x 190 cm (2ft6) | Younger children or compact rooms |
| Single | 90 x 190 cm (3ft) | Most high sleepers and cabin beds |
| Small Double | 120 x 190 cm (4ft) | Larger high sleepers with double platform |
EU sizes such as 90 x 200 cm will not fit UK high sleepers correctly and may overhang or leave dangerous gaps. Cot or toddler sizes (60 x 120 cm or 70 x 140 cm) are only for cots and mid-sleepers designed for younger children.
For the majority of High Sleeper Beds and Cabin Beds & Mid Sleepers, the 90 x 190 cm single mattress is the correct choice.
Recommended Mattress Types for Raised Beds
Open-coil sprung or foam mattresses in the lighter weight range are ideal because they are easier to manoeuvre up stairs or ladders. Memory foam options provide pressure relief without excessive heat retention when paired with a breathable cover.
Start with Memory Foam Mattresses from trusted names such as Noomi, Maxitex or Solace+Co for a balance of support and comfort at shallower depths.
Recoil mattresses are another strong option for active children; their firmer constructions suit the movement often experienced on elevated frames. Avoid very soft deep mattresses that compress too much and reduce the effective guard-rail height.
Checklist Before Buying a Mattress for Your High Sleeper
- Measure the exact internal frame dimensions of your high sleeper or cabin bed.
- Confirm the manufacturer’s maximum mattress depth on the product page – never exceed it.
- Calculate ceiling clearance: measure from floor to ceiling, subtract bed height and mattress depth; ensure at least 60 cm sitting height remains.
- Check that the chosen mattress meets BS 7177 fire safety regulations – all mattresses sold in the UK must comply.
- Decide on firmness: children under 12 usually need medium-firm support to promote healthy spinal alignment.
- Consider adding a mattress protector to guard against spills on an elevated bed that is harder to strip.
Safety Rules Specific to High Sleepers and Bunk Beds
All bunk and high sleeper beds sold in the UK must comply with BS EN 747. The top-bunk guard rail must rise at least 16 cm above the mattress surface, so the maximum mattress depth quoted by the bed maker is a hard limit. Top bunks and high sleepers are not recommended for children under 6 years old.
Ensure the ladder is securely fixed and that the mattress does not create a trip hazard at the edge. For cabin beds that convert into mid-sleepers, the same depth rules apply once raised. If your child tends to roll or sit up quickly during the night, choose a mattress with good edge support so they do not feel they might roll off.
Our Top Picks for High Sleeper Mattresses
These single mattresses from recommended brands suit most high sleepers and cabin beds because their depths stay within typical limits while delivering solid support.
Noomi Memory Foam Mattress
A popular choice for high sleepers because the memory foam layer cushions pressure points for children who move a lot at night.
Maxitex Pocket Sprung Mattress
This single mattress offers individual pocket springs for targeted support and a shallow profile that fits safely inside Flair and Noomi high sleepers without compromising the 16 cm guard-rail rule.
Solace+Co Hybrid Mattress
Combines foam and springs in a medium-firm feel; the controlled depth keeps the sleeping surface low enough for safe use on elevated cabin beds and allows easy rotation for even wear.
Recoil Essential Foam Mattress
Designed for active children, its firm foam construction resists body impressions and remains lightweight enough to carry up to high sleeper platforms while staying within safe depth guidelines.
Additional Accessories That Help
A slim mattress topper can fine-tune comfort without adding dangerous height. Choose one no thicker than 5 cm and re-check total depth against the bed’s limit. Pair any mattress with a good protector to extend its life on a bed that is less accessible for cleaning.
If you are furnishing a complete room, browse the wider Kids' Beds range or Bedroom Furniture to coordinate storage solutions that work with your chosen high sleeper layout.
Take time to measure twice and buy once. The right single mattress for your high sleeper or cabin bed will give years of safe, comfortable sleep without compromising the safety features built into the frame.
Our picks for this guide
- Noomi Memory Foam Mattress – depth fits safely inside most high sleepers while providing pressure relief without reducing guard-rail height.
- Flair Fern Staircase High Sleeper – Designed with precise mattress depth limits that pair perfectly with single memory foam or pocket sprung mattresses from recommended brands.
- Maxitex Pocket Sprung Mattress – Shallow single profile keeps the sleeping surface low enough to maintain the 16 cm guard-rail clearance required by BS EN 747.
- Mattress Protectors – Essential extra layer that guards against accidents on elevated beds that are difficult to strip and clean regularly.
Frequently asked questions
Can I use a double mattress on a high sleeper?
Only if the high sleeper frame is specifically built for small double (120x190 cm). Standard single high sleepers will not accommodate a double mattress safely and the overhang creates a serious fall risk. Always match the mattress footprint exactly to the bed base dimensions.
What is the thinnest mattress suitable for a child on a high sleeper?
A 10-12 cm foam or open-coil mattress is usually sufficient for children up to age 12. Thinner than 10 cm may not provide adequate support or comfort. Check the bed manufacturer’s minimum depth recommendation to avoid the mattress sinking too far below the guard rails.
Do memory foam mattresses get too hot in a high sleeper?
Modern memory foam mattresses from Noomi, Maxitex and Solace+Co include cooling gel or open-cell foam that reduces heat build-up. Good airflow around an elevated bed also helps. A breathable mattress protector further improves temperature regulation.
How often should I rotate a mattress on a high sleeper?
Rotate every 8-12 weeks to prevent uneven wear. Because high sleepers are harder to access, choose a lighter mattress or one with handles. Follow the care instructions on the mattress label for best longevity.
Are there fire safety rules for mattresses used in cabin beds?
Yes. All mattresses sold in the UK must meet the Furniture and Furnishings (Fire) (Safety) Regulations 1988 and are tested to BS 7177. This applies equally to those used on high sleepers, cabin beds and bunk beds.
Related guides
- Choosing the Right Mattress for Guest Beds
- Choosing a Mattress for a Mid Sleeper Bed
- Bunk Bed, Cabin Bed or High Sleeper? Take the Quiz
- Latex Mattress Firmness Guide: Choosing the Right Level
- High Sleeper Bed vs Mid Sleeper Bed: Best for Small Children's Rooms
- Guest Room Bed Size Guide: Choosing the Right Bed for Visitors