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How to Extend Mattress Length: Innovative Solutions

From the Puffy Editorial Team | 4 min read.
How to Extend Mattress Length: Innovative Solutions

Sleeping on a mattress that’s too short can be uncomfortable and unhealthy, leading to poor sleep quality and physical discomfort. Whether you’re looking to extend the length of a standard mattress, an RV mattress, or need to know how to use plywood for extension, this article provides effective solutions. 

How to Extend a Mattress

Assessing the Need for Extension

  • Determine the Additional Length: Measure the gap you need to fill to ensure a comfortable fit.
  • Room Space Assessment: Confirm there’s sufficient space in your bedroom to accommodate the extended mattress.

Detailed Methods for Mattress Extension

  1. Mattress Extenders: These are specially designed foam blocks that can be placed at the head or foot of your mattress. They come in various sizes to suit different bed dimensions.

  2. Customized Solutions:

    • Custom-sized Mattress Toppers: Order a topper that extends beyond your mattress’s length, offering a seamless extension.
    • Extension Panels: Some companies provide extension panels that can be securely attached to your existing mattress.
  3. Bed Frame Adjustments:

    • Extendable Frames: Consider an adjustable bed frame that can be lengthened to accommodate the mattress extension.
    • DIY Frame Extensions: For a more hands-on approach, DIY extensions to your current bed frame can also be a viable option.
  4. Additional Considerations:

    • Seamless Integration: Ensure the extender or topper blends well with your mattress for consistent comfort.
    • Support and Stability: The extension should be securely attached to prevent shifting or sagging.

Puffy mattresses, with their versatile design, can be easily paired with extenders or customized toppers, making them a practical choice for those in need of extra mattress length.

How to Extend RV Mattress

Understanding RV Mattress Constraints

  • Unique Dimensions: RV mattresses often come in non-standard sizes, posing a challenge for extension.
  • Limited Space: RV interiors have space limitations that must be considered.

RV Mattress Extension Strategies

  1. Custom Foam Extensions: Tailor-made foam pieces can be cut to the exact dimensions needed for your RV mattress, providing a perfect fit.

  2. Adaptable Toppers:

    • Custom-sized Toppers: A specially made topper can add both length and comfort to your RV mattress.
    • Layered Bedding: Using additional layers of bedding can also help bridge small gaps at the end of the mattress.
  3. RV Bed Frame Solutions:

    • Modifying the Frame: In some cases, the RV bed frame can be modified to accommodate a longer mattress or extension piece.
    • Slide-out Extensions: Some RVs offer slide-out sections where the bed area can be physically extended.
  4. Ensuring Comfort and Safety:

    • Smooth Transitions: Make sure the extension is flush with the original mattress to avoid discomfort.
    • Secure Attachment: It’s crucial that any extension is securely attached to prevent movement while the RV is in use.

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.

How to Extend Plywood Under Mattress

The Plywood Extension Method

  • Purpose: Plywood can be used to create a solid, extended base for the mattress.

Steps for Plywood Extension

  1. Measure Your Mattress and Desired Extension: This will guide the size of plywood needed.
  2. Choose Quality Plywood: Ensure it’s sturdy and smooth to avoid any damage to the mattress.
  3. Securely Attach the Plywood: Affix it to the existing bed frame or base, ensuring it’s stable.
  4. Cover with a Mattress Topper: This helps in smoothing out any transitions between the plywood and the original mattress base.

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

Additional Tips for Extending Mattress Length

Ensuring Comfort and Safety

  • Smooth Transition: Make sure there are no sharp edges or uncomfortable bumps at the extension point.
  • Regular Maintenance: Check the extension setup periodically to ensure it remains secure and comfortable.

Choosing the Right Mattress for Extension

  • Selecting a mattress that is adaptable and durable is crucial for successful extension.

Puffy mattresses, known for their customizable options, can be a great choice when looking for a mattress that can be extended to suit your needs.

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.


Extending the length of your mattress is a practical way to enhance your sleep experience, especially for those who find standard sizes limiting. By considering the type of mattress, the space available, and the materials used for extension, you can achieve a comfortable and safe sleep setup.

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  • 6 layers of cloudlike luxury.
  • Medium-plush feel.
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