[Poppy's 5th Wheel]

We had the same problem. We originally thought a new, better mattress would resolve it but, nope. I was going to go the same route as Jim did but when we bought our mattress our salesman told us if it still sagged in the middle he would provide us with what is called a Bunkie Board. They are fairly expensive to buy, around $200, but since we didn't have to pay for it we went that direction. It did work as promised.

It did add about an inch to the height of the bed but now our bed is like home.

I found this through googling Bunkie Board and this looks like a great option and far cheaper than what ours was (would have been).

http://www.walmart.com/ip/Signature-...Board/34334506