Fixed foundations come with a choice of a bunkie board or a box spring. The mattress lays on the option you choose. The bunkie board is 2” thick and a box spring is 6” thick.
To maximize safety rail protection above the mattress, choose a bunkie board. The mattress surface can be positioned 5 inches lower within the foundation. To raise the mattress surface from the floor, choose a box spring. The mattress will be positioned 5 inches higher allowing for a more flush transfer.
There is no price or comfort difference, only a height difference.
Posted in: Beds, Mattresses