Cot and Children's Furniture Assembly: Safety Basics
How to approach building cots and children's furniture safely: following instructions exactly, checking fixings, avoiding gaps and re-checking over time.
Nursery and children's furniture needs more care than most flat-pack builds. A cot or changing unit is used daily by a young child who cannot assess risk, so even small shortcuts in assembly matter. This is general information only; the manufacturer's instructions always come first.
Start with the instructions
Read the whole booklet before touching a screw. Children's furniture is often designed with specific measurements, spacing and orientation in mind, and these are safety features, not just design choices.
If the booklet is missing, ask the manufacturer or retailer for a copy before building. Do not guess the order.
Use only the correct parts
- Use the fixings supplied. Substituting longer or shorter screws can weaken joints or leave sharp ends.
- Do not leave any parts out, even if the cot appears solid without them.
- If anything is missing or damaged, stop and request a replacement. See what to do about missing parts.
Assembly priorities
Tighten properly
Loose bolts allow movement that can work further loose over time. Tighten all connections fully, but avoid overtightening that cracks wood.
Check the mattress fit
A mattress should fit snugly with no wide gap between its edge and the cot sides, following the manufacturer's guidance. A badly fitting mattress is a known hazard, so use the size specified by the cot maker.
Check spacing and gaps
Bars and rails are spaced to prevent a child's head or limbs becoming trapped. Do not modify or remove any. Check the drop-side, if any, operates only as intended.
Check for sharp edges and protruding fixings
Run a hand over the finished piece. Cover or replace anything that snags, using manufacturer-provided caps.
Set mattress height correctly
Most cots have adjustable base heights. Use the lowest setting as soon as the child can pull up or sit, as the instructions direct.
Other children's furniture
Chests and wardrobes
Tall units should be secured to the wall, particularly in children's rooms where climbing is likely. See anchoring bookcases and tall furniture to walls.
Changing units
Check the weight limits and ensure any restraint straps are installed as instructed. Never leave a child unattended on a changing surface.
Toy boxes
Choose or adapt lids so that they do not slam shut, and check ventilation features are as designed.
Keep checking
Re-tighten fixings regularly, particularly after moving a cot or after heavy use. Look for cracks, splinters and worn parts. Stop using any item with damage that cannot be repaired with proper replacement parts.
Second-hand furniture
Second-hand cots should be treated with extra caution. Standards and designs change, and missing parts or damage can be hard to spot. Check for the instructions, labels and a complete set of parts before use, and consult current safety guidance from official bodies.
Getting help
If you are unsure, an assembler can build the piece and discuss any concerns, though responsibility for following instructions remains shared. Tell the provider it is for a child, and share the booklet. See how to compare offers.
A step-by-step checking routine
- Build the cot on a clean, flat floor with space around it, following the manual in order.
- Tighten every bolt with the correct key, then go round the whole frame a second time.
- Run a hand over every edge, rail and bolt head to feel for burrs or protruding fixings.
- Fit the mattress and check the gap at each side. The manual will say what is acceptable; a thick mattress that rides up is a warning sign.
- Move the drop side or base (if there is one) several times to check it locks securely.
- Record the build date in your phone so you remember to re-check in a few weeks.
Placement in the room
Think about what is within reach of the cot, not just the cot itself. Keep it clear of blind and curtain cords, wall decorations, shelves that things could fall from, and wall sockets with trailing leads. Also avoid positions where heat or direct sun lands on the cot for long periods. These are general good-practice points; follow the cot manufacturer's own guidance and current UK product-safety advice.
Common mistakes
- Using spare screws from another build because they look similar.
- Tightening mattress-base bolts but leaving the corner posts a little loose.
- Re-using old hardware from a second-hand cot without a full parts list.
- Building without the instruction booklet, relying on memory of a previous model.
- Adding padding, bumpers or toys that the manual does not recommend.
Building larger children's pieces
For cabins, high sleepers, toy storage towers and chests, the same logic applies: follow the sequence, secure tall units to the wall (see anchoring bookcases and tall furniture) and check the weight limit before anyone climbs on them.
Frequently asked questions
Should I build a cot before the baby arrives?
Yes, ideally several weeks ahead. This leaves time to check for missing parts, air the mattress and re-tighten fixings once the cot has settled.
Can I put the cot against a radiator or window?
Manufacturers and safety bodies generally advise keeping cots away from radiators, windows and blind cords. Follow their guidance for your set-up.
Do I need to tighten bolts again after a few weeks?
It is good practice. Wood can compress and bolts loosen slightly, so re-check after the first few weeks and then periodically.