My DIY mattress is way too hard
Oct 18, 2011 10:35 AM
Joined: Oct 18, 2011
Points: 11
Ok, I read a lot on these forums, tried out lots of bed and decided to put together my own mattress through FBM, and I didn't do a very good job at all.  I bought

2 in LUX ILD 55

3 in HD 38 ILD

2 in Latex 20 ILD

With the terry cloth cover.  Everything looked good.  The latex foam looked perfect to me, no stains or anything.  There was an odor mostly from the polyfoam, and it was strong, but I let it air out for a a few hours and it dissipated.  The measurements were pretty close.

I thought that I liked mattresses that were firm with a nice soft comfort layer and I thought that I would probably add some more softness on top of the mattress, but this thing is a brick.  I already had 2 inches of soft memory foam, so I threw that on top and I still didn't make it through the night (the cat LOVED the memory foam, and she slept great.  I didn't).  I'm a back/side sleeper, but I could get sort of comfortable on this on my stomach.  I ended up sleeping on my 15 year old mattress.

I'm 120 lbs, so I think that I just do not have enough weight to sink into the mattress at all.  It feels pretty soft if I push on it with my hand, but when I lay down I feel like I just "float" on top.  I stayed under my budget so far, but the mattress needs more adjustment than I expected.  The whole thing is on plywood.

My thoughts are that I should get rid of the LUX foam and buy 2 inches of something softer - like maybe the medium soft foam from Foamforyou, which I think is ILD 23, but the names on the website confused me a bit.  Additionally I'm thinking of getting another inch of very soft latex from somewhere else.  I'm not sure where yet.  I know the FBM ILD 20 is probably harder than other ILD 20s, but I need the top layer to be a whole lot softer, so even if its actually 24 or so, I don't think 19 will do the trick.  I'm thinking 14 max, but foamonline offers a 10 ILD.  Not sure if they are any good, but the price is not so bad.  So the new set up would be

3 in HD 38 ILD

2 in HD foam ILD 23

2 in Latex 20 ILD

1 in latex 10 ILD

I could also stick the memory foam in there somewhere if I need to.  If I do that, I will pretty much be at my budget, so I don't really want to fail miserably again, so I would really appreciate any comments.  I tried some latex over foam mattresses in stores and liked them, so I know its possible to make this work.  Any suggestions on where to find an inexpensive soft piece of polyfoam?  Would it help to walk on the foam and break it in?  Thanks!

Re: My DIY mattress is way too hard
Reply #9 Oct 20, 2011 11:02 AM
Joined: Oct 18, 2011
Points: 11
Oh and one more question.  I read in another post that putting latex over memory foam could keep the latex from breathing.  What does that mean?  Should I put a sheet or something between the memory foam and the latex??  Maybe I should take a picture of the foam and try to post it, because my memory foam is not dense at all.  I'd guess it weighs about 10 lbs, which would make it about a 2 lb density, so maybe it breathes better than decent quality memory foam. 
Re: My DIY mattress is way too hard
Reply #10 Nov 23, 2011 2:19 AM
Joined: Sep 30, 2011
Points: 60
So Lefty, what do you think of the SLAB 14ILD latex ?   Had a LONG conversation today with a helpful woman there.  She said that she's gotten the impression that FBM latex tends to be firmer, at a given rated-ILD, than theirs.  So even though I said I'd put 1" of FBM 20ILD on my unknown 6" latex base and still found it too hard, she thought I'd be happy by adding another 1" of SLAB's 19ILD latex.   She's sending me a sample of the 19 and 14 ILD.   She said "you can't lie down on a sample" (duh), but that you could kinda judge the relative firmness by pinching it.

Anyhow, very helpful and un-hurried conversation.   They ARE expensive though ... But it looks like FBM simply has nothing any softer than the 20ILD latex, except the super-soft foam - except I think someone said, maybe you, that it's no softer than the 20 ILD latex.    It's possible I don't need a softer material (than the FBM 20ILD latex), just another inch (or two) of it; except when I tried folding double my 1" piece, it still seemed too firm.  Maybe 3" would do the job, but I'm thinking I really need an inch of something softer, especially since the 1" of old-old p/u eggcrate on there now (on top of the 1" FBNM 20ILD) feels pretty nice, definitely not too firm, if not maybe a little "saggy".