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Looking for an ultra firm mattress like the "Plank" by Brooklyn Bedding 09 Aug 2022 10:33 #1

  • bobby2478
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I currently have the Plank mattress from Brooklyn Bedding, and it started off great and was exactly what was looking for in terms of firmness/support. I sleep on the ultra firm side and it felt great. After sleeping on it for a few weeks now however it has softened in the middle where I sleep and I can tell that i'm beginning to sink in a bit, which is causing some back discomfort. I'm 6'0" 220lb (29 BMI) and am a combo back and side sleeper.

After reaching out to brooklyn bedding, this is what they said the layers are (if anyone else knows for certain i'd appreciate correct info):
    <li>.75-inch High-density 1.5lb Quilting foam 50ILD</li>
    <li>7-inch Ultra high-density 1.8lb support foam 36ILD</li>
    <li>2-inch Titanflex 3.5lb Cooling Foam 30ILD</li>
    <li>1.5-inch high-density 1.5lb quilting foam 36ILD</li>

I sleep on the "ultra firm" side with 0.75" of foam directly on top of the base support foam, and the support foam underneath has started to already soften in the middle where I sleep and isn't as firm as it was initially. This isn't entirely surprising based on the foam density ratings of 1.5lb and 1.8lb. The thing I think that works about this setup for me is the comfort layer is just under 1" thick, and this sits right on top of ultra dense base foam. The thicker and softer the comfort layer, I sink in too far causing my spine to get out of alignment and be uncomfortable, and most mattresses have comfort layers over 3" thick, which in combination with them being not firm enough for me, is why i haven't had much luck.

As it has softened a bit, I added a 0.5" 50ILD 2.8lb Lux HQ foam from Foam by mail on top and this has definitely helped but not enough. Considering the low cost I also just ordered a 1" thick and 2" thick of this same foam 50ILD 2.8lb Lux HQ foam to try out on top of the mattress as well to see how that works.

Ideally I could find another ultra firm mattress like this with thin, firm comfort layers but just higher density/more durable materials that will last longer. Any suggestions? I purchased a 2" 44 ILD Firm Dunlop topper from SOL and it isn't quite firm/supportive enough so I believe I need a material other than latex as that is about the firmest latex i've seen and isn't quite right for my needs.

I see that they make a Titan Firm mattress, but the comfort layers appear to be thicker (1" soft memory foam, 2" of medium titanflex foam, also too soft). I also see Original Mattress Factory makes an Orthopedic Extra Firm and an Orthopedic Ultra Firm mattress that might be a good option I'll need to go look at. Only hesitance with OMF is they don't offer a return policy. However if it is extremely firm (even if too firm), as long as it's durable and won't meaningfully soften then i can always add a topper on top to provide some extra pressure relief (even high density firm foam that's 1" or so) and if this cheap foam wears out after a few years no big deal it's only $50 to replace.

Another option is always full DIY, but if I went that route are people able to buy their own zip mattress cover/sleeve to encase all the various layers in?

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Last edit: by bobby2478.

Looking for an ultra firm mattress like the "Plank" by Brooklyn Bedding 12 Aug 2022 06:42 #2

  • NikkiTMU
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Hi bobby2478.

So sorry to hear your mattress is already softening. The specifications they gave you are the bare minimum we would recommend in terms of durability for a medium framed person, so it's no surprise that under your larger build the foam are already breaking down. How disappointing that they choose to use less durable material.

Unfortunately, it's nearly impossible to firm-up a too-soft mattress :( You can try putting it directly on the floor to see if that helps at all. Since the material is only just breaking down, it's possibly that the firm topper you've purchased will help in some regard but ultimately you may just sink the topper into the materials that are already too soft and it may not be the experience you want in terms of comfort and alignment.

Another option is always full DIY, but if I went that route are people able to buy their own zip mattress cover/sleeve to encase all the various layers in?


Absolutely. A number of our Trusted Members sell DIY materials including encasements.

NikkiTMU
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Looking for an ultra firm mattress like the "Plank" by Brooklyn Bedding 17 Aug 2022 12:11 #3

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The Plank was great for a few weeks but softened up a tad recently, and while it's still good it just needs to be a tad more firm/supportive. I added a 1" piece of 2.8lb 50ILD polyfoam on top and now it feels great.

I used the following, I am aware some people on the forum don't recommend FBM but considering the price I paid (only $26 for 1" twin xl) even if it falls apart after a couple of years that's fine with me.
www.foambymail.com/lux-hq-foam-sheet.html

It says 2.8lb/cu ft density, 50ILD, and only 1.9 support factor, but at the very least I'd assume this has to be superior to the cheap 1.8lb 36ILD support core currently in my Plank mattress?

Considering I'm on the extra firm side of the Plank currently, the setup is pretty basic (it's a 2 sided mattress, the softer side that I'm not sleeping on now on the bottom and consists of everything below the support core):

1-inch 2.8lb Lux HQ foam from FBM - 50ILD *** Topper I added
.75-inch High-density 1.5lb Quilting foam 50ILD
7-inch Ultra high-density 1.8lb support foam 36ILD
2-inch Titanflex 3.5lb Cooling Foam 30ILD
1.5-inch high-density 1.5lb quilting foam 36ILD

Biggest concern right now is long term durability of the Plank given the lower density 1.8lb support core (also softer at 36ILD) and 1.5lb quilting foam on top. Given this setup, it wouldn't be hard for me to basically just DIY with the vast majority of it 2.8lb 36ILD support core, followed by 1 inch 2.8lb 50ILD comfort layer on top. Only thing I'd question is knowing I like/need a really firm mattress, if it might not be better to just make the support core 2.8lb 50ILD and I could always add additional softer layers on top if i need more give since it's always easier to soften up a mattress that's too firm, rather than make a too soft mattress more firm.

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Looking for an ultra firm mattress like the "Plank" by Brooklyn Bedding 18 Aug 2022 11:11 #4

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Hi bobby2478.

Thanks for thiscxza`Z update. I'm glad you had a good experience with FBM and that you have a plan B in the event that you need to replace that layer in a few years.

It says 2.8lb/cu ft density, 50ILD, and only 1.9 support factor, but at the very least I'd assume this has to be superior to the cheap 1.8lb 36ILD support core currently in my Plank mattress?


I agree!

Your DIY ideas are sound as well. Do you have any specific questions about that approach?

NikkiTMU
Researching for a mattress?... Be sure to read The Mattress Shopping Tutorial. . Click here for TMU Discount Codes if purchasing from Our Trusted Members.
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