Closely laid wooden slats a metal base a bunkie board or even the floor will all do just fine in place of a box spring.
Foam mattress box spring plywood.
You can also create a flat surface with a bunkie board or a piece of plywood.
The plywood also gives added strength to allow even distribution to the weight of the memory foam on top of it.
If you do not want to throw out your box spring just yet adding a few layers of plywood will make your box spring firmer.
Back in the day this was a common practice for physicians.
All you need for your foam mattress is a solid base.
You will definitely need a strong support if your mattress is foam or latex.
You can find perforated plywood in a good hardware store.
In order for your box spring to allow proper air circulation i recommend you put a sheet of perforated plywood on top of the box spring.
That said if your box spring is rigid and firm less than an inch of give it should be okay to use with a memory foam or latex mattress.
Nectar has step by step instructions on how to do that.
Do doctors physicians recommend placing a piece of plywood between your mattress and box spring.
In the case where the mattress was originally designed for use with a flexible boxspring use of plywood under the mattress will accelerate wear.
Yes plywood can be used under a box spring.
Can i use plywood under a box spring.