How to Keep Split King Mattress From Separating

If you own a split King mattress, you probably already understand the benefits of having your own separate zone for personalized comfort. But what happens when you notice that it’s starting to drift apart or sag in the middle?

How to Keep Split King Mattress From Separating

To make sure that this doesn’t turn from an occasional hassle into a persistent problem, we have put together some handy tips and tricks on how to keep split King mattress from separating over time! Read on to learn more about proper mattress care and maintenance so that both sides remain attached and provide lasting support.

Required Items

  • Mattress links or straps
  • Non-slip mattress pad
  • Bed frame with center support

10 Ways How to Keep Split King Mattress From Separating

1. Connect Two Mattress

Use mattress links or straps to connect the two mattresses together. This will reduce shifting and ensure that each side remains in place when you’re sleeping. Also, ensure that the links or straps are securely fastened for optimal results.

2. Use a Non-slip Mattress Pad

Place a non-slip mattress pad between the two mattresses to help keep them from slipping apart. This will also make it easier to move the beds around together if needed. While you’re at it, make sure that the mattress pad is properly secured with the appropriate bedding or straps.

3. Bed Frame with Center Support

Make sure your bed frame has a center support to provide adequate support for your split king mattress. The added stability will help prevent sagging and separation of the two mattresses over time. Furthermore, you can add wooden shims or metal bars to supplement the center support if necessary.

4. Don’t Overload One Side

Avoid putting too much weight on one side of the split King mattress. This could cause the two mattresses to separate over time due to unequal distribution of weight and pressure points. Make sure that you and your partner evenly distribute the load when sleeping so that the two mattresses remain connected.

Two Mattresses Remain Connected

5. Rotate Your Mattress

Rotating your mattress is another simple way to keep it from separating over time. This will ensure that wear and tear are more evenly distributed, resulting in longer-lasting comfort for both sides of the mattress. Try to rotate your mattress at least twice a year for optimal results.

6. Avoid Jumping on Your Mattress

Jumping or roughhousing on the bed can cause unnecessary wear and tear to your split king mattress, as well as separate it over time. This can lead to lumpy spots and weak support, along with an uncomfortable sleeping experience.

7. Pay Attention to Compatible Bed Frames

If you’re buying a new bed frame for your split king mattress, make sure that it is compatible with both mattresses. Many frames are designed to fit only one mattress at a time, which can lead to uneven support and, eventually, separation of the two sides over time. Also, ensure that the frame provides adequate support for both mattresses.

8. Add Additional Support with Bolster Pillows

You can add extra support and comfort to your split king mattress by using bolster pillows between the two mattresses. Not only will this prevent sagging and separation of the two sides over time, but it’ll also provide additional cushion and support for your spine.

9. Keep Your Mattress Clean

Cleaning your mattress is another easy way to keep it from separating over time. Regularly vacuum the surface of your split king mattress to remove dust, dirt, and other debris that can cause wear and tear to the material over time. You can also spot-clean any stains or spills with a mild detergent.

10. Re-tighten Connectors Regularly

If you’re using mattress links or straps to connect your two mattresses, be sure to re-tighten them every few months. This will ensure that they remain secure and in place, preventing the sides from splitting apart over time.

Using Mattress Links

Following these simple steps will help you keep your split king mattress from separating over time and ensure that its lasting comfort and support is maintained. With proper care and maintenance, you can rest assured that your mattress will provide a good night’s sleep for many years to come.

8 Maintenance Tips

1. Prevent Shifting

Make sure that your bed frame is sturdy and well-protected with a mattress pad or any other kind of protective layer. This helps to prevent the split king mattress from shifting as you sleep. Also, make sure that your bed frame is level and does not lean to one side or the other. If  your bed frame is not level, then it may cause the mattress to shift and eventually separate.

2. Check for Loose Connections

Make sure that the connection between the two halves of your split king mattress is secure by regularly checking for loose connections. If necessary, adjust the clamps or straps used to hold them together as needed.

3. Protect from Dust and Dirt

Dust particles can accumulate quickly in a split king mattress, causing it to become clumpy and lumpy over time. To protect it from dust and dirt, use a mattress protector or cover that fits snugly over the mattress. This will help keep dust and dirt from accumulating and will also protect the mattress from spills, which can damage the material.

4. Keep Things off the Bed

This is particularly important for split king mattresses, as you don’t want to put too much weight on each side of the bed. Avoid storing items such as heavy books, tools, or other items directly on the mattress. This can cause the split king mattress to separate over time.

5. Rotate Regularly

Regularly rotating and flipping your split king mattress will help to keep it from separating at the seams by evenly distributing weight and pressure across its surface. Rotate it once every few months.

6. Keep It Clean

Regularly cleaning your split king mattress is important to ensure that it remains in good condition and does not separate at the seams. Vacuum the mattress periodically, paying special attention to any areas where dust and dirt have accumulated. If necessary, spot clean with a mild detergent or use a mattress cleaner specifically designed for mattresses.

Regularly Cleaning Your Split King Mattress

7. Check for Damage

Inspect your split king mattress periodically for any signs of damage, such as tears, rips, and stains that could cause the mattress to separate at the seams. If you find any damage, have it repaired or replaced as soon as possible.

8. Choose Quality Materials

When purchasing a split king mattress, it is important to choose one that is made of high-quality materials. Low-quality materials are more prone to damage and may be more likely to separate over time. Be sure to read reviews or ask questions before buying in order to find the best quality mattress for your needs.

By following these tips, you can help ensure that your split king mattress remains in good condition and does not separate at the seams. Remember to regularly check for loose connections, rotate and flip the mattress regularly, and choose a quality product to get the most out of your purchase.  With proper care and maintenance, your split king mattress should last for many years!

Frequently Asked Questions

Why is my split king mattress separating?

Split king mattresses can separate due to improper support or if the bed frame isn’t holding the mattress together properly. Additionally, a lack of regular maintenance, like rotating and flipping the mattress, can lead to sagging and separation between two halves.  

How do I keep my mattress from sliding on my adjustable bed?

To prevent the mattress from sliding on an adjustable bed frame, make sure that you use a mattress retainer bar or a special locking system. Also, ensure that the bed frame is properly placed and leveled on the floor to provide adequate support for the mattress. Finally, if possible, choose an adjustable bed with slatted frames instead of box springs as these can provide more stability and keep the mattress in place.

What is the best way to support a split king mattress?

The best way to support a split king mattress is by using a bed frame designed specifically for split king mattresses or two separate twin-size frames side-by-side. Make sure that you use a center support bar and the proper type of foundation or box spring that is designed for split king mattresses. Additionally, be sure to use mattress retainers or locking systems on adjustable bed frames for added stability.

Two Separate Twin-size Frames


Keeping a split king mattress from separating isn’t as hard as it may seem. With an adjustable base, you can change the settings to customize the level of weight and support for each side. Investing in good quality split king sheets that are designed to hold the two parts together can also help prevent separation and make your sleep experience smoother.

Furthermore, regularly checking and tightening the screws on your adjustable base can help keep your mattress securely in place. While no mattress is completely safe from splitting, following these simple tips on how to keep split king mattress from separating can potentially help keep your split king mattress secure and safe irrespective of how much time you spend in bed. So go ahead and enjoy peace of mind knowing you’re making proactive steps towards keeping your split king mattress safe!

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Angela Ervin

Angela is the chief editor of Indoorense. She began her career as an interior designer before applying her strategic and creative passion to lifestyle and home. She has close to 15 years of experience in creative writing and online content strategy for housekeeping and cleaning,home decorations as well as other efforts. She loves her job and has the privilege of working with an extraordinary team. She lives with her husband, two sons, and daughter in Petersburg. When she's not busy working she spent time with her family.

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