Are there any drawbacks to using my old box spring with a Sleep Number bed?

asked Jan 11 '13
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George G from Irmo, SC
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I am going to go against the other two answers. The "magic" in any air tech bed is in the mattress. That being said, it does need a firm surface to rest against. You may be able to use your current foundation, depending on what shape it is in. Look at the fabric on the sides, does it sag? If so it is time to repalce it. Look under the foundation, is there any loose wood pieces? then it is time to replace it. As far as the surface, it might be advisable to install a plywood sheet on top of it to make sure the surface is firm enough. And you might want to consider matching the fabrics between bed and foundation, a matching set would look nicer when undressed. Or there are other options out there that might save you the expense of their base. Again, just make sure the surface has no give in it. Platform beds work really well. A queen base as an example would cost $300, a local mattress store might have a mismatched foundation they would sell for maybe $100... It's just how hard you want to work to save a few bucks. Hope this helps! Our store sells Comfortaire, I or my store are not affiliated with Sleep number or Select Comfort.

answered Jan 11 '13
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Norma H from Hillsboro, MO
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Can't you just place a 3/4" piece of plywood over your old box spring and have a solid foundation?

answered Aug 29 '14
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Mike H from Conroe, TX
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Hi George,

I urge you to replace the box spring regardless, especially if what you have is 7-10 years old or older. The Sleep Number mattress would come with a firm, non-yielding, flat platform so if you do decide to use your current box spring, you need to inspect it to be certain it's flat across with no soft, flexible areas. Any uneven areas will affect the mattress and may cause sagging or may make the mattress less supportive. Also do a visual inspection to be sure there are no places where it has been crunched or broken around the edges.

Box springs in the current mattress market refer to a foundation or platform. Box springs, with actual coils usually under 2 sided mattresses, do not work with most mattresses produced and definitely not under the Sleep Number bed. If your box spring is only a year or two old and from a major "S" brand, then it is likely a platform and not the older, traditional box spring.

Sleep Number may not honor their warranty unless it's their foundation underneath the mattress so you may want to check with them to be 100% certain. If they would still honor it, it would then be okay as long as you identify that it is acceptable support.

answered Jan 11 '13
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Andrew Schle... ♦
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I have to disagree with most the comments. It really depends on the type of bed you have. If there is no support other then then the sides of the bed where your boxspring rest then yesnyou really should invest in a new boxspring and perhaps additional support. If your bed is a platform or anything with support along the whole length of the bed then drop ply wood on the support ($50.00 at a hardware store) and it is more then enough. I went this route 7 years ago with my last select number bed after reading several options and it worked like a charm for the whole seven years. The only warning is to make sure you apply a skirt over the ply wood or it will slowly wear at the bottom of your select number mattress. Hope this helps you save a few EASY bucks.

answered Sep 07
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Sergio M from Boston, MA
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Hi George,

Regardless of the brand of mattress, a new mattress should have a new box spring. Even if it visually looks okay, it could be crumbling from underneath. I always tell my customers, "you wouldn't build a new house on an old foundation, so you shouldn't put a new mattress on an old box." Hope this helps!


answered Jan 11 '13
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Debi Chewerda ♦
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George, I concur, replacing the box spring, will help preserve warranty, maintain a healthier sleeping environment, prolong the life of your new mattress and if there was any poor support in your current box spring you would see sagging in your new mattress sooner.

answered Jan 12 '13
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Jeff Saunders ♦
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Asked: Jan 11 '13

Seen: 26,186 times

Last updated: Sep 07