Hi Digitair,
Any foam mattress with a polyfoam support core will generally do best with a firm, flat, and evenly supportive support surface underneath it that has minimal to no flex under the mattress and for larger sizes with at least one center support beam that has good support to the floor to prevent any sagging in the middle of the mattress. The components (either a bedframe and foundation or a platform bed) need to be strong and durable enough to support the weight of the mattress and the people sleeping on it without some of the parts bending, sagging, shifting, or breaking with extended use. The support surface under the mattress (which may be slats or a steel or wire grid) should have enough surface area to prevent the mattress from sagging through any gaps or spaces in the support surface over time but still allow some airflow under the mattress. If a foundation has a slatted surface then I would suggest that the gaps between any slats are no more than about 5" (with 1 x 3 slats) although less than 4" would be better yet.
There is more information about the different support systems (bedframes and foundations or platform beds) that are generally suitable for different types of mattresses and some examples of each of them in post #1 here. There is also more information about bedframes that can be used under a foundation in post #10 here.
I would be somewhat cautious with these type of lower cost wire grid platform foundations (see post #10 here). While they may be OK over the short term or even the medium term with a mattress that has a firmer polyfoam support core … the support surface area isn’t as large as support systems that have wooden slats so there would be some additional risk of the mattress sagging into the gaps between the wires over the longer term. There are a fairly large number of critical reviews that talk about the frame or legs bending and that indicate that the quality and strength of the steel and the foundation itself isn’t as high as it could be and there are also a percentage of them that appear to develop squeaking issues over time that may be difficult to locate and solve.
This has flexible slats that are designed to flex under the mattress along with plastic slat holders that can break and I would also be skeptical about the overall strength and durability along with the strength of the metal frame and legs. I would avoid this one.
-no return policy on the ghostbed foundation, which worries me if something goes wrong.[/quote]
This foundation meets all the criteria for your mattress or any similar mattress with a polyfoam foundation so even if you don’t keep the ghostbed you could use it under another foam mattress. All you would need to go with this would be a bedframe.
Phoenix