Mattress Forum

Same here.  

Either way I'd bet an old solid wood frame is sturdy enough for whatever you stack on it.  

Thanks, Jason (and thanks, megalops).
 

I've been saying my foundation is wooden, but I guess it does have some steel in it, too. It's the Leggett & Platt "Semi-Flex limited deflection" unit.

Relevant links if anyone's interested (these things come with a lot of mattresses now):

L&P Semi-Flex Web page (a little info)

L&P Semi-Flex PDF (details about the semi-flex foundation)

I am spending entirely too much time pondering mattress components and options....

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Edited the next morning to add:
Whatever this foundation is made of, I'm feeling the slats on it through 5" of medium latex + my old thin fiberbed. [Correction: I'm feeling the metal grid. Youch. The wooden slats are just supporting the metal grid. I should have looked at the L&P PDF more carefully.]   Yesterday morning wasn't bad, but today I woke up feeling like I've been pummeled. I might be back on the couch tonight. And/or I might have to get a few inches of inexpensive high-density PU foam, just to buy myself some time.

I am also obsessed with finding the right mattress, but have a few comments;

Do not put a solid piece of plywood under your mattress - it won't breathe and can mold. 

I would try the old foundation, but make certain the slats are spaced and secure.

I bought a metal bed with a really cheesy set of supports, that I think was sagging and causing back pain.   

So I replaced it with plywood, supported by 2x4s - seriously sturdy.   Of course, as you point out, I had to address moisture issues.    So I got a spade bit and drilled at least a hundred 1+" holes in it.   I *think* it's enough, haven't noticed any moisture, or seen any mold, on the bottom of my foam.   I keep thinking I should drill more sometime ...

I've thought about doing that -- or just getting some pegboard, if that's sturdy enough. (I think it would be, since it'd be resting on top of my foundation, not directly on the bed frame). I'd probably put it under a sheet or inside my allergen casing or something, so it's not directly under the mattress.

Gonna check the bed-frame slats next and then get back to work....Well, what do you know... got me some dips there.* (I flipped the dipping slats over.)

I'll have to add a few more slats to the bed frame, probably, and see about rigging up some sort of center support** from the bottom. The center support would have to rest on the floor, because there's nothing it can attach to on the bed frame.

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* Even when my innerspring mattress is directly on the floor, the coils do not feel supportive enough, so I don't know how much of a factor those little dips were. The foundation seems quite sturdy.

** Or get something like the "adjustable center leg bed frame support" gizmo from Woodcraft (but I'd need a few of them), or some sort of steel support gizmo from The Sleep Shop (they have several options), or some sort of steel center support from Planet Bed (their "V-Rail" thing looks neat but might be overkill for me).

Those "BedBeam" things look very sturdy, but I don't think they'd work with my bed frame (ditto for some of these other metal support systems). My cross-slats aren't attached to the rails; they lie *on* the rails (or on the "cleats" if that's the proper term for that small ledge on each rail), so they're about a half-inch higher. The BedBeams and Metal Support Slats look like they're meant to be flush with the rails/cleats/ledges/whatever they're called, so I'd have to add half-inch-high blocks of wood under them where they'd attach to the ledges if I want to use them with my wooden slats (rather than instead of them).

Ditto with the Strong Arm Center Supports and these Mighty Lift supports; I'd have to shim them if I want to use them in addition to my slats, rather than instead of my slats. I guess these things & the BedBeams are intended to replace the wooden slats. (Um... duh?)

The Lazarbeam Center Support would work with the slats I have, since it's just meant to help keep them up.

So... replace the wooden slats with steel slats (that could get expensive); get something like the Lazarbeam; use those standalone things from Woodcraft; or find a very low-tech way to add center support to my wooden slats?

I could just get a long sturdy piece of lumber and give it a few sturdy "legs." Since any mattress I get is going to rest on the self-contained foundation, rather than on the bed-frame slats, I don't think I have to worry about the frame getting bowed outward to the sides. (Do I?)

(Pardon all my thinking-out-loud here. Those steel support systems are not returnable, so I don't want to get stuck with something that turns out not to work because I forgot some important detail, like, you know, how my bed frame is actually constructed.)

Of course, when I add the center support, I'll have to find another place to put the mattress, which is now stashed under my bed. It'll have to lean up against a wall somewhere or just go out to the curb.

Yesterday I covered the foundation with a sheet of luan so I wouldn't feel the metal grid from the foundation poking me. (Luan was probably not the best choice, but it was cheap, I didn't see any decent-looking pegboard, and I was delirious from lack of sleep. If I need something different later, I'll get what's needed.)   So now I have the Novabond mat under the luan, and the 2 sheets of Dacron from the mattress over that, and then my latex & my old thin fiberbed. (So now I feel a solid hard surface instead of metal wires; a different sort of discomfort but preferable to the wires... I think.)

I might order a few inches of 50 ILD or 35 ILD (or maybe an inch or two of both) from FBM to use as a temporary mattress core under my latex. If that's comfortable enough, it'll give me time to recover from the months of sleep deprivation & mattress-caused pain, and I'll be in better shape to decide if I want to stick with a PU foam base, go for a Dunlop core, or try another innerspring.  That's the hope, anyway. We'll see how things go.

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Added Monday AM: Last night I added one more inch of latex, using the stuff I'd tried zoning with (14 ILD, 32 ILD, 14 ILD; put below the 24 ILD and N3/27 ILD layers). Not wonderful, but it helped enough with pressure points that I might not need the temporary poly-foam core. Not quite sure yet. (Still some lower back pain, but I don't know if it's from the latex, from the dacron being worn out, from my slightly dippy slats, or from a combination of those. Shoulders were much better this morning, though.)

Um... did I say "easy"? Yeah, right.

I've got four of those adjustable center support thingies attached to a 6-foot pine 1"x4", and that's under all the slats now. And may I just say... what a freakin' pain in the a--.

The screws that came with each support were too long -- I didn't want them poking through the other side of the 1x4 -- so I had to go buy different screws. And you have to really wail on the rubber bottoms of those supports with a hammer to get the one piece inserted into the other. And I thought I finally had each support adjusted to the right height before I put the foundation back on the bed, but I still wound up on my back on the floor, under the bed (not much clearance there), using my crescent wrench, at all sorts of odd angles, to adjust the height of each support some more. And the supports don't seem particularly stable, at least on a hardwood floor -- maybe they'd work better if they sank into some carpet.

Also, while moving my torch lamp from my office to see how long the cord was, to see if it would reach into the bedroom so I could maybe see what I was doing while drilling starter holes and screwing the metal supports into the pine, I managed to topple the lamp over and send shards of glass all over -- in the office, down the hall, into my bedroom, and into the room at the other end of the hall. (All swept & vacuumed up now.... I hope.) So now I need to replace an $80 lamp that I really liked. 

Obviously there are much worse problems in the world, but I am not a happy camper right now.

Those supports and that 6' piece of pine better do their job, and I better be able to rule out dipping slats as a cause of any sink holes appearing in any mattress that ever goes on that bed. (So there!)

Man, I'm tired of wrestling with this stuff..... I'm lucky to be physically able to wrestle with this stuff, but I am tired of wrestling with it.

No decisions on the next mattress yet, either. Back still hurts; hip still hurts.

But the finger that got gouged a couple weeks ago appears to be healing with minimal scarring, so that's something.

Definitely, once you get your frame/supports situation under control, go for it.  err on the side of too firm with those.. And it might not be temporary after all. Even if it is, at this point I'd try any solution that potentially provides pain free sleep as priority one, with longevity being way down the list.  But I've accepted mattresses as more of consumables, & don't care if I end up having to buy a new one every few years if it otherwise works.

I sure hope the frame/supports situation is under control now!

I do need to do something soon, that's for sure. I was holding off on ordering the foam until I had a chance to look at a 10-year-old barely used innerspring-mattress-and-box-spring set that friends are selling. Thought I'd see it this weekend, but we're having scheduling difficulties.

I also did some research on flame retardants and got myself thoroughly confused.... No idea if conventional mattresses made before the 2007 regulation use any less-toxic materials than mattresses made after that.

Trying not to do so much research that I let "the perfect be the enemy of the good," but I don't want to waste more money, either. There's a fine line there... somewhere.....

Unfortunately flame retardants & toxins haven't even been on my radar. Just so long as it doesn't have a strong smell, can't deal with that, it's been even further down the list of priorities than longevity.  Hopefully sticking purely with what works for comfort & pain free sleep at the expense of everthing else doesn't cost me down the line, but I probably have one of the least natural setups here.