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How to Measure Mattress Sag for Warranty: A Detailed Guide

From the Puffy Editorial Team | 3 min read.
How to Measure Mattress Sag for Warranty: A Detailed Guide

Mattress sagging can significantly impact sleep quality. If your mattress is under warranty, measuring the sag accurately is crucial for a successful claim. This article will guide you through the process of measuring mattress sag to meet warranty requirements.

How to Measure Mattress Sag

Essential steps to accurately measure the sagging in your mattress.

Measurement Process:

  • Remove Bedding: Strip the mattress of all bedding, including sheets and mattress toppers, to expose the bare mattress.
  • Use a Straight Edge: Place a straight edge (like a yardstick or a broom handle) across the mattress where the sag is deepest.
  • Measure the Gap: Using a ruler or measuring tape, measure the vertical distance from the bottom of the straight edge to the top of the mattress at the lowest point of the sag.
  • Repeat for Accuracy: Measure a few times to ensure accuracy and take the largest measurement.

Documenting Mattress Sag for Warranty Claims

How to properly document mattress sag for submitting a warranty claim.

Documentation Tips:

  • Take Photos: Capture clear photos of the straight edge and the ruler/measuring tape showing the depth of the sag. Ensure the measuring tools are visible and readable.
  • Record Measurements: Write down the measurements along with the date and time.
  • Gather Purchase Details: Include information about the mattress model, purchase date, and place of purchase.

Understanding Mattress Warranties

Insights into what mattress warranties typically cover and what to look for in warranty terms.

Warranty Coverage:

  • Sagging Depth: Most warranties have a specific depth requirement for sagging, such as 1 inch or more.
  • Time Frame: Check the duration of the warranty and when it starts.
  • Exclusions: Be aware of what is not covered, like normal wear and tear or damage due to misuse.

Interested in how Puffy stacks up against other brands? Check out our mattress comparisons: Puffy vs Purple, Puffy vs Nectar, Puffy vs Casper, Puffy vs Leesa, Puffy vs Saatva, Puffy vs DreamCloud, and Puffy vs Tuft and Needle.

Preventing Mattress Sag

Tips to prevent sagging and extend the life of your mattress.

Prevention Strategies:

  • Rotate or Flip Regularly: Regularly rotating or flipping the mattress (if applicable) can help prevent uneven wear.
  • Proper Support: Ensure your bed frame or box spring provides adequate support to the mattress.
  • Even Weight Distribution: Avoid sitting on the same spot repeatedly or placing heavy objects on the bed for prolonged periods.

Puffy mattresses are designed to minimize sagging over time, but following these preventive measures can further extend the life of any mattress.

Check out Puffy mattress reviews from real customers and see how we compare with other brands.

When to Replace a Mattress

Knowing when it’s time to replace your mattress instead of pursuing a warranty claim.

Replacement Indicators:

  • Persistent Discomfort: If the mattress causes discomfort or poor sleep quality despite attempts to fix the sag.
  • Visible Damage: Signs of wear and tear beyond just sagging, like springs poking through.
  • Age of Mattress: Consider replacing the mattress if it’s close to or beyond the typical lifespan of 7-10 years.


Measuring mattress sag accurately is crucial for a successful warranty claim. By following these guidelines, you can ensure that your measurement process is thorough and meets the requirements of your mattress warranty.

Use our store locator to find the closest furniture or mattress store near you and feel the cloudlike comfort of our Puffy Mattress in person.

Remember, maintaining your mattress and understanding the signs of when it’s time to replace it are equally important for ensuring long-term sleep quality and comfort.

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