Hi M.Norman,
[quote]Problem:
The feeling of dips in mattress, noticed after 2 weeks.
Not sure if it is a foundation problem (or if I am just super sensitive.
…As we previously had a spring mattress with an excellent quality low box spring and I felt dips and also felt the 'solidness of the 2 box foundations- where they came together, made the bed comfortable and non sagging in that area)[/quote]
If this was happening after only two weeks then it’s most likely that you chose a mattress that is too soft for you or that your mattress was “on the edge” of being too soft when it was new so even the initial break in period took you over the edge into the “too soft range” (see post #2 here). There are also some suggestions in post #4 here that may be helpful including your suggestion to make sure that your foundation isn’t the cause of any issues you are having (you can check this by putting your mattress on the floor to see if it makes any difference).
I’m not sure what type of foundation you have but a memory foam mattress will do best on a firm non flexing foundation that would provide similar support to having your mattress on a floor.
The Luroy Slats are flexible and aren’t the best choice for a memory foam mattress and could also lead to “virtual impressions” (the impressions you can feel but aren’t visible in the mattress surface when you aren’t on the mattress)
It’s also very likely that your Novaform Primafina uses some lower quality/density materials that would be a weak link in the mattress in terms of durability so unless you can find out the quality/density of the all the foam layers in your mattress (see this article) then even if the cause of the virtual sagging is your foundation and can be “fixed” I would be very cautious about keeping it when there are so many better quality/value and more durable options available to you.
Phoenix