Nectar has step by step instructions on how to do that.
													
																	Foam mattress box spring plywood. 
									
	
		
	
																	While you shouldn t directly use a memory foam mattress with a box spring you can still use it to make your bed taller by slipping a bunkie board between your mattress and box spring. 
																	Bunkie boards are pieces of plywood or particleboard that are two or three inches thick which provides a flat surface with enough support to prevent your mattress from sagging. 
																	Do doctors physicians recommend placing a piece of plywood between your mattress and box spring. 
																	You can find perforated plywood in a good hardware store. 
															
													
									
	
		
	
																	Can i use plywood under a box spring. 
																	All you need for your foam mattress is a solid base. 
																	The plywood also gives added strength to allow even distribution to the weight of the memory foam on top of it. 
																	Back in the day this was a common practice for physicians. 
															
													
									
	
		
	
																	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. 
																	Using a box spring for a foam mattress. 
																	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. 
																	You will definitely need a strong support if your mattress is foam or latex. 
															
													
									
	
		
	
																	Yes plywood can be used under a box spring. 
																	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.