No — a box spring is not required for every mattress setup, but what you use instead depends entirely on your bed frame type and mattress construction.
Modern platform beds and slatted frames are designed to support a mattress directly, so adding a box spring there is unnecessary and often counterproductive — it adds 4" to 9" of height you probably don't want. Where a box spring still earns its place is on a traditional metal rail frame with no deck support: without one, the mattress has nothing solid underneath it. If you have a slatted platform frame but your slats are spaced too far apart, a bunkie board — typically 1" to 2" tall — closes those gaps without the height penalty of a full box spring. The key variables are frame type, slat spacing, and how much total bed height you're working with.
- Standard box spring height: 8"–9"; low-profile box spring height: 2"–4".
- A bunkie board adds 1"–2" of profile and is designed for platform or slatted frames, not traditional rail frames.
- Greaton's Amish-made solid wood box springs use snug-fitting joints with no metal hardware — the primary cause of box spring creaking over time.
- Memory foam and latex mattresses generally require a solid or closely slatted surface; wide slat gaps can cause premature sagging in foam mattresses.
- Recommended maximum slat spacing for foam mattresses: no more than 3" between slats to prevent mattress deformation.