None of this is true. The long and short of it is that most major manufacturer’s warranties demand that you have a quality box spring that provides adequate support. It’s probably safe to say that if your bed set is very old, you should probably change the mattress and get a new box spring also. Some stores, such as Mattress Discounters in Virginia, offer separate pricing on all mattresses and box springs so you can spend what you need to be happy on the mattress, and then save some money on the box spring. Any modern box spring from a reputable brand should properly support a mattress of the same size.
King Koil says: “If your mattress is damaged due to an inappropriate foundation, which did not properly support the mattress, your warranty will be voided.”
You will find similar statements highlighted in the detail section below.
Does the Frame I use Play a Role in My Warranty?
Yes, particularly for Queen sizes and up. Most manufacturers specify the number of “slats” and demand a center support leg, some specify the material such as hard wood or metal. Without this proper frame support, the warranty could be voided.
The Select Comfort Sleep Number Bead Boasts a “20 year” Warranty, is this Twice as Good as the 10 Year on Competing Mattresses?
Not really. Since Select Comfort spends so much money paying actors to do fancy commercials in order to get the word out about their product, we thought they deserved their own question in the warranty section. Each of their commercials boasts a “20 year limited warranty.” How limited? You be the judge: