Is the high density foam firm enough to place under the sofa cushions (and above the springs) in order to give sagging sofa cushion/spring support?
445106
Yes, I used it to replace the back cushions on my ecktorp Ikea sofa. It is very firm. For the seats you will need a thicker piece or double the pieces.
575563
Probably but the matress is not very thick, maybe 4 inches, so it would probably bunch up. I would try testing the overlap with a sofa cushion of about the same thickness.
1186778
Imagine the letter "L", except with legs. The bottom part of the L is what slides under your mattress, holding the whole contraption upright beside your bed. So you need to have a mattress on your sofa bed for that part to slide under. It also has a strap to go around the boxspring, and I think you could use it to secure it to the platform of the sofa bed. So it should work as long as you leave the sofa bed unfolded and secure the strap firmly, although it may not be secure enough to withstand a lot of heavy use.
732921
Yes, I can see it working for a sofa. As long as you are able to push it between the two cushions or a cushion and arm rest maybe even a cushion and the back rest. It is very sturdy.
298954
I used the high density foam on my dining chairs. They feel very firm, which I prefer. They have good support
1418063
I just saw a thing called the "mattress helper" that help prop-up a sagging mattress, if that's what you've got going on. If, on the other hand, your mattress is too hard for your comfort, a thick, foam might be helpful. If you buy that kind of foam you'll need a cover between you and the foam - and this cover might work depending on the thickness of your mattress. I like a firm mattress with thick foam - supports you yet feels cooshy.
1428572
I think it wud be fine for the toss pillows----not so sure abt using for cushions. It will flatten over time.
2270400
This will not provide support. My husband and I tried this in the same manner you are asking about. It did not seem too hot, feathers did not stick us, however we didn't use it for more than a couple days because it did not make a difference in the cushion feel I expected from my mattress.
1231706
It is much firmer than I thought it would be, and should outlast the upholstery. This is high quality dense foam.
2150933
I don't think so. You don't need box springs with high density foam. We use slats or a plywood platform and it's perfect.
237026
no...it will not firm up the mattress....you might put a piece of plywood between the mattress and box springs for that and if that is to firm then this memory foam will soften it and that might work for you
1980548
If there are springs, I don't feel them! We've had this sofa for about 5 months and we love it!!! It is nice and soft. I would definitely recommend it. No complaints!
1128418
This cushion is pretty firm, & has a 3 inch raise. I like it best for a wooden chair. I think if you used it lying down that you would end up arching your back. I would not buy it for lying down d
2037060
The boards fit under the mattress, so if the sofa bed has a mattress I would say yes.
781190
No - it is a high-density foam. It is not super "cushy" but is comfortably supportive.
1708397
I would not use this cushion for this sofa. I suggest you put a piece of plywood under the cushions. This will raise it up somewhat.
80347
John, my guess is not. The foam mattress will bend to the contour of your foam mattress and you will end up with a deeper sag. Have you flipped the mattress? To be sure, I would call or stop in a mattress store and ask for their thoughts. Good luck. David