What is a box spring for?


What is a box spring for?

In: Engineering

For bed frames that do not have supports across the middle.

Some bed frames are just the outer rectangle connected at the head, foot and maybe once across the middle. Set a mattress on that by itself and when you sit on it it’ll push through the frame. Putting a sturdy box spring on it first prevents that.

If you have a platform bed frame or bed frame with sufficient support in the middle then a box spring is not necessary.

So maybe a sheet of 1/2” plywood?

I think that might be cheaper than a box spring.

Box springs are foolish.

Edit – As noted elsewhere here, a sheet of plywood would not allow the mattress to breath. That being said, there are far cheaper options to get support and breathability than buying a box spring.

They also allow for airflow adding the mattress – the material is thin for a reason. Putting a bed directly on plywood, as someone suggested, can lead to moisture issues.

Most “box springs” today are actually foundations – which is designed mainly to support the mattress, allow moisture and airflow on the bottom of the mattress and to leave your bed at the correct height.

Box springs used to have actual springs that provided additional support for the mattresses. Mattress technology has come a long way and that is no longer needed.

Bed frames that don’t use foundations use slats which, again allow for airflow around the mated while supporting the mattress correctly. All Queen mattresses and larger must also have a centre support, regardless of what you are using (foundation, slats or just a sheet of plywood) without that support, the mattress will sag and your warrantee will be voided. The scene spray should be just slightly shorter than the short on the sides so that there is a small amount of give.

Fun fact – most mattresses have 10+year warranty but should really be replaced every 7-8 years because you may not realize that your mattress isn’t spring you correctly because your used to sleeping on it, but they tend to be less supportive at the end of that 10 year period.

Fun fact #2 – unless something goes really really wrong, the mattresses today are made so that they will never actually sag down to a point where warranty could be claimed on it…even if the mattress is completely ruined. They are designed to never “fail” from a warranty point of view.