How to firm up a mattress?

How to firm up a mattress?


Firming up a mattress is a common concern for many individuals who find their mattress too soft or saggy. A firm mattress provides better support for the body, promoting spinal alignment and reducing discomfort. In this article, we will explore various methods to firm up a mattress and improve its overall comfort.

Adjusting Mattress Layers

Materials used: Mattress topper, plywood board, foam inserts.
One of the simplest ways to firm up a mattress is by adding a mattress topper. Look for a topper made of firmer materials such as latex or memory foam. This additional layer can provide the necessary support and firmness. Another option is to place a plywood board between the mattress and the box spring or bed frame. This creates a solid surface, reducing the mattress’s sagging. Additionally, foam inserts can be placed underneath the mattress to add extra support and firmness.

Rotating and Flipping

Frequency: Every few months.
Over time, mattresses can develop indentations and sag in certain areas. To prevent this, it is important to rotate and flip the mattress regularly. Rotating the mattress involves turning it 180 degrees, while flipping it means turning it over entirely. This helps distribute the weight evenly and prevents excessive wear on specific areas, thus maintaining the mattress’s firmness.

Using Mattress Support Boards

Materials used: Mattress support boards.
Mattress support boards are specifically designed to provide additional firmness to a mattress. These boards are placed underneath the mattress, providing a solid foundation and preventing sagging. They are particularly useful for older mattresses that have lost their firmness over time.

Replacing the Box Spring

Importance: Box springs can lose their firmness over time.
The box spring plays a crucial role in supporting the mattress. However, over time, box springs can lose their firmness and become less effective in providing support. If you find your mattress sagging, consider replacing the box spring. Opt for a newer, firmer box spring to enhance the overall firmness and support of your mattress.

Consider a Firm Mattress Topper

Materials used: Firm mattress topper.
If your mattress is too soft and cannot be adequately adjusted, consider investing in a firm mattress topper. These toppers are specifically designed to add firmness to a mattress. They are available in various thicknesses and materials, allowing you to choose the level of firmness that suits your preferences.


Firming up a mattress is achievable through various methods, including adjusting mattress layers, rotating and flipping, using mattress support boards, replacing the box spring, and considering a firm mattress topper. By implementing these techniques, you can improve the firmness and support of your mattress, ensuring a comfortable and restful sleep.


– Sleep Foundation:
– The Spruce:
– Healthline: