To come with the bunk bed and it’s fine, yes you can just use a regular full size mattress for the bottom bunk and a single size mattress for the top bunk. As long as the mattresses are the right size for the bunk bed that is all you will need, no box springs.Click to see full answer. Subsequently, one may also ask, what mattress is best for bunk beds? Top 8 Mattresses for Bunk Beds Review 2020 LinenSpa 8″ Memory Foam and Innerspring Hybrid Mattress (Editor’s Choice) Signature Sleep Contour 8 Inch Reversible Coil Mattress (Runner-up) Olee Sleep 10 Inch Gel Infused Innerspring Mattress (Best for Cooling) Zinus 6 Inch Spring Twin Mattress (2-pack Ideal for Bunk Beds) Additionally, what is the difference between a bunk bed mattress and a regular mattress? Not really Bunkie mattresses are essentially the same as any other regular coil spring mattress. Steel coil springs, foam padding, and fabric. The mattress may also rest on steel slats that are spaced very close together so the mattress will not sag. In this regard, how thick should a mattress be for a bunk bed? You want to look for a mattress that’s no thicker than six inches, generally. Some bunk beds allow you to add a seven- or eight-inch thick mattress, but those are rare. To stay on the safe side, look for four to six inches in thickness to be safe.Does a bunk bed need a boxspring?Here are the primary reasons for not using a foundation or boxspring with a bunk bed: Box springs will elevate the mattress to height that is greater than the safety side rails. Using a box spring on a top bunk will not only lift the mattress higher but eliminate head space in the top bunk area.