Mattress decision guides
Look beyond a single replacement number
A mattress does not become unusable on a fixed birthday. These guides help you inspect what has changed, separate mattress wear from bed-base problems, and decide what to monitor next.
Mattress replacement signs: a practical checklist
Combine visible changes, comfort, support, and repeatable comparisons instead of relying on age alone.
Mattress age vs. condition
Understand why age is useful context but not a universal expiry date, and what evidence should carry more weight.
How to check mattress sagging and support
Use a simple home inspection to distinguish an uneven mattress from a weak frame, bowed slats, or an unstable foundation.
How these guides fit the calculator
SleepCheck summarizes five signals into a transparent score. The guides explain how to check those signals more carefully. They do not diagnose pain, guarantee a product lifespan, or replace a manufacturer’s warranty instructions.