Hi Phoenix,
I have a memory foam mattress with a platform bed and the slats are very far apart (only 5 slats total). I purchased a bunkie board to lay on top of the slats. After using the bunkie board for a few months, I get sharp pains in my ribs after sleeping for a few hours. It’s so bad, I can’t even take deep breaths when I first wake up. I think my bunkie board was made with cheap material and is broke/sagging because when I put my mattress on the floor I don’t have the rib pain anymore. I weigh about 205 lbs and the mattress is 100 lbs.
I found this thread when googling rib pain and it seems similar to my issue. https://forum.mattressunderground.com/t/why-do-my-ribs-hurt-on-everything-i-sleep-on
I don’t really know what to buy at this point. I was looking at a steel bunkie board but the steel slats on the one I’m looking at are about 5" apart so I’m not sure if that will work. Zinus Quick Lock® Easy Assembly Metal Slat Bunkie Board, Queen - Walmart.com
I’d like to keep the platform bed and mattress if I can. I need something that will support me and the memory foam mattress without pain. Any help would be appreciated.