How to assemble a crib
A crib (cot) has to be built exactly as designed, with every part and no additions. Most cribs have an adjustable base height, and the gaps around the mattress are a safety matter, not a comfort one.
- Time
- about 1 h
- Difficulty
- Moderate
- People
- 1 person
- Steps
- 7
Tools needed
- Allen key (supplied)
- Cross-head screwdriver
- Tape measure
Parts to check first
Before you start, lay everything out on a soft surface (the flattened box works) and check it against the parts list in your manual.
- Head and foot ends
- Two sides
- Base (mattress support) and its brackets
- Bolts, barrel nuts and any teething rail covers
- The crib's own manual with the mattress size
Step by step
Step 1: Check that every part is present and undamaged: no cracked slats, splinters or missing bolts. Do not use a crib with missing parts.
Step 2: Fit the base brackets to the head and foot ends at the highest position for a newborn, or the height the manual gives for your child's age.
Step 3: Join one side to the head and foot ends with its bolts, finger-tight, then the second side.
Step 4: Drop the base onto its brackets and bolt it in place.
Step 5: Tighten every bolt fully and check the crib does not rock or rack when pushed.
Step 6: Put in a firm mattress of the size the manual gives. There should be no gap bigger than about two fingers between the mattress edge and the crib sides.
Step 7: Lower the base to its lowest position as soon as your child can sit or pull up, and re-check all bolts regularly.
Common mistakes
- Using a mattress smaller than the crib, which leaves gaps a baby can get trapped in.
- Adding bumpers, pillows or loose bedding, which safe-sleep guidance advises against.
- Keeping the base at the top position once the baby can pull up to stand.
Safety notes
- Place the crib away from windows, blind cords and wall hangings.
- Never modify a crib or replace parts with ones not made for it; ask the maker for spares.
- Follow your local safe-sleep guidance: baby on their back, on a firm flat mattress, with nothing loose in the crib.
This is general guidance for this type of product. Your product's own manual comes first: follow its order, fittings and torque values where they differ from this page.
Updated 2026-09-30