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Estimated reading time: 4 minutes
Plywood Between Mattress and Boxspring. Is This Good Or Bad?
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Answer: Not only will we answer that question but a few other commonly asked questions along the same lines.
Answer: Putting a piece of plywood on a flexible energy absorbing boxspring will not allow the boxspring to give where the body needs it to give.
Answer: No, especially in the case of flexible boxsprings that can absorb energy that is designed to provide give. If the boxspring does not have the correct give to it the mattress can become squashed and compressed between our body weight and the piece of non-giving non-flexible plywood. In the case where the mattress was originally designed for use with a flexible boxspring, the use of plywood under the mattress will accelerate wear.
Answer: Back in the day, this was a common practice for physicians. They believed that placing a board between your mattress and boxspring increased the support for our bodies. At that time the reality was that practice did two things. It increased the speed at which the mattress would wear out while offering some additional temporary firmness for what was usually a worn-out mattress. Today my guess is most doctors wouldn’t have a clue as to what impact a piece of plywood would do when used in conjunction with a mattress set. If the doctor did their research they would find that many boxsprings are not boxsprings at all, but are actually foundations that are already rigid just like plywood which of course doesn’t give. Other boxsprings are considered semi-flexible but are just about as rigid as the foundations I just mentioned.
Answer: Most of the time the answer is yes. You would need to read your warranty card for the specific warranty details. Most warranties are fairly straightforward in that when the mattress and boxsprings are being altered from their intended design say by placing a board between the boxspring and mattress your factory warranty will be void.
NOTE: Just after the turn of the century the mass production of mattresses boxsprings came about. Virtually all boxsprings used coils springs that made them flexible. The coil-designed boxsprings would absorb up to 30 percent of the energy transferred through the mattress. We believed this to be a crucial factor in increasing and extending the life of a mattress.
Today with the ever-increasing popularity of thick layers of polyurethane foam, plush, and generously cushioned mattresses, many manufacturers claim that the boxsprings are not as effective. By eliminating coil springs in a box spring mattress manufacturers were able to decrease costs by decreasing the amount of steel. This is just one of many cost-cutting solutions used to help minimize retail costs for the consumer. Another benefit of losing coiled springs is motion transfer between sleeping partners has been virtually eliminated. None of these advances in the mattress and box spring over the years has been due to slipping a piece of plywood between them. Our opinion is this: do not use a piece of plywood between your mattress and boxspring it has no real convincing and credible advantages.