Do I Need to Buy a Boxspring?
A mattress and foundation are engineered to work together
as a set, and the foundation takes a lot of the nightly wear
and tear and contributes to the bed's overall comfort and
support. Putting a new mattress on an old foundation, pairing
it with a foundation it wasn't designed to work with or adding
a board between the mattress and foundation will impede comfort
and reduce the useful life of your new mattress. It may also
affect the manufacturer's warranty
coverage.