How to Make Mattress Firmer in 4 Different Ways!

Is your mattress too soft? Does it prevent you from getting a good night’s sleep? As we all know, the quality of your mattress can affect the quality of your sleep. One of the factors that are important in making you feel comfortable is the firmness of the mattress. But what should you do if your mattress is too soft? What are the ways on how to make mattress firmer? Well, you do not have to wait for the answer any further! That’s because this article will already tell you what you need to know!

Step-by-Step Guide on How to Make Mattress Firmer

There are actually many ways on how you can make mattress firmer. In fact, here are 4 of them:

1. Using a mattress topper

This is the simplest way on how to make your mattress firmer. But keep in mind that this option only works for mattresses with only minor damages and sagging issues.

What You Will Need

  • Mattress Topper
  • Tape Measure
Mattress topper

Step 1. Measure your mattress.

Using a tape measure, get the length and width of your mattress. In this way, you can buy a mattress topper that is of the same exact size as your mattress.

Step 2. Choose a mattress topper.

Mattress toppers come in different types. Because of this, it is important that you do your research to know the pros and cons of each type.

Pro Tip: A memory foam or latex mattress topper will provide you medium firmness. On the other hand, a cotton filled mattress will give you soft yet firm support.

Step 3. Purchase the topper.

Once you have made your decision on which type of mattress topper to use, make sure to inspect it for any defects. If it doesn’t have one, bring it home and place it on top of your mattress.

2. Using a plywood

This is a permanent solution to your soft mattress. It is also recommended for a box spring that sags because of age. However, this option can be quite laborious and time-consuming.

What You Will Need

  • Plywood
  • Saw
  • ​Tape Measure
  • Sanding Paper


Step 1. Cut the plywood to fit the size of the mattress.

Again, you would need to measure the dimensions of your bed to make sure that the plywood will fit it properly. Cut the plywood to the same size.

Pro Tip: If your bed is queen size or bigger, you may need to use two pieces of plywood for it.

Step 2. Shape the plywood.

Most probably your mattress has curved corners, right? Because of this, you also need to curve the corners of your plywood.

To do this, place the plywood on top of the mattress. Trace the corners of the bed. Saw along the line that you have traced.

Step 3. Polish the plywood.

Using a sanding paper, polish the board. Do the same with the edges too. Wipe the dust that may come as a result of the sanding process.

Pro Tip: Sanding the edges will help prevent splinters and possible snagging.

Step 4. Install the plywood.

Place the plywood on the box spring and place the mattress on top of it.

3. By flipping

A mattress becomes soft because of wear and tear. Flipping the mattress will allow you to lie on the part of mattress that does not exhibit any wear and tear. This method is the best option for maintaining the shape of the mattress and increasing its lifespan.

However, this method works only on mattresses that can be used on both sides.

Rotating the mattress


Step 1. Rotate the mattress at the end of the base.

From its usual position at the bed, rotate the mattress to the left.

Step 2. Lift the mattress on edge.

Push the mattress to the headboard and slowly raise it on edge.

Step 3. Put the mattress down.

Step 4. Re-align the mattress.

After putting the mattress down, bring back the flipped mattress in its usual position on the bed.

4. By adding center support on the bed frame

Incorporating a center support to your bed frame can firm up the mattress and prevent it from further sagging.

What You Will Need

  • Saw
  • 2 x 2 wooden board
  • ​Four wooden bed slats
  • ​Drill 
  • Wood screw
Slat wood

Step 1. Cut the slats.

Using a hand saw, cut the wood into four bed slats with a length that is equal to the inside dimensions of the bed frame.

Pro Tip: Make sure to check if you have cut the slats to the right length by placing the slats inside the frame. Place the slats at an 18-inch interval.

Step 2. Measure the vertical distance between the surface of the floor and the slats.

After getting the measurement, cut a 2 x 2 wooden board with a length similar to the measurement that you have gotten. Cut 4 pieces of these.

Step 3. Drill a hole through the center of the slats.

Drill a hole


Using a tape measure, locate the midpoint in length and width of the horizontal slats. Drill a hole into it.

Step 4. Attach the 2 x 2 wooden piece to the hole.

Arrange the 2 x 2 wooden piece in a vertical manner under the hole drilled into the horizontal slat. Attach it using a wood screw. Do this on all 4 horizontal slats.

Step 5. Arrange the slats in place.

After putting the 2 x 2 wooden pieces (that now act as a leg support in the center of the horizontal slats), arrange the slats in the bed frame at 18-inch intervals. Place the mattress on top and enjoy a firmer mattress!


A soft mattress will prevent you from getting the comfortable sleep that you need. Lucky for you, there are many ways on how to make mattress firmer. We have enumerated four different ways to do so. Choose which of the methods mentioned above suits your needs the best and just follow the steps!

Did you find this tutorial useful? If yes, then please share them with some of your friends. If you have any clarifications or suggestions, you can share them with me in the comments section!

Josephine Lesley

Hi! I am Josephine G Lesley. I love children! In fact, I am an obstetric nurse and my passion is to ensure that each and every child on my watch will receive the proper care and utmost love that they deserve. I treat each child that I meet as my own and I am happy to be always surrounded with cute and loving children not just at work but also at home. I am actually a mom to a 4-year-old child and I am preparing to welcome another child soon! Because of my work and my family life, I believe that I have gained some amazing insights on child care and rearing and I want to share with you all of my knowledge through this blog. I am doing this in the hopes that I can be able to help other people in their motherhood journey! I hope you will enjoy reading my blog as I enjoyed writing it for you!

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