While i wait for more layers for my DIY foam mattress, I've placed my old innerspring *on top of* the foam mattress--because, as is, i can't sleep on the foam mattress yet, and I don't have room to prop it against the wall (where my old innerspring has been spending its time).

Question: Is this hurting the foam mattress? Compressing it too much, too consistently? And when i place the memory foam and latex toppers on the foam mattress, and--if i don't like it still--place the innerspring back on top, temporarily, will this hurt the memory foam/latex? Just wondering if it's bad for it not to have a chance to 'rebound' or breathe during several days.

I know this is an odd set-up, and an odd question, but any replies are appreciated!!! :)