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

  1. 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.

  2. 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.

  3. Step 3: Join one side to the head and foot ends with its bolts, finger-tight, then the second side.

  4. Step 4: Drop the base onto its brackets and bolt it in place.

  5. Step 5: Tighten every bolt fully and check the crib does not rock or rack when pushed.

  6. 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.

  7. 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