How To Fix A Sagging Mattress With Plywood 

It’s good to have a comfortable mattress to sleep on at the end of a long day. However, you may get dissatisfied with your mattress if it begins to sag in particular areas. Sagging is said to be one of the oldest issues bound in beds, and sagging mattresses can hurt the health; hence the sagging mattress must be fixed. There are various ways of setting sagging mattresses. Fixing a sagging mattress depends on the type of mattress. Sagging occurs when the mattress undergoes excessive pressure from the person sleeping specifically in a particular area. It also depends on the quality or the type of mattress used—mostly mattress sags where the shoulders and hips lie due to the body weight.

Causes Of Sagging Mattresses

  • Due to old box springs.
  • Wear or Tear 
  • Inappropriate foundations.
  • Wrong mattress size.
  • Faulty bed frame.
  • Heavy or overweight people.
  • Poor quality of the mattress. 

Before you begin repairing a sagging mattress with plywood, you should first determine the type of mattress. Not all types of mattresses will work with this technique. If you’ve got an innerspring or air bed, plywood will not work. You’ll need to find a piece of plywood with the appropriate thickness for your mattress. One of the traditional methods used for fixing the sagging mattress is using a  wood board, simply placing it underneath the sagging part of the mattress. The wood boards offer proper support that will help restore the mattress that has been sagged. 

The tool required for repairing the sagging mattress is a drill so that the screws can be easily removed. Without any further hindrances 

Ways To Fix Your Bed

  • Measure bed first

To fix a sagging mattress, you should measure the bed first especially if it is a full size bed . This way, you can tell where the sagging is. Also, you should check to see whether the sagging is only in one part of the bed. If it is, then the whole mattress may need to be fixed. However, if you find that the entire bed is sagging, you can simply cut a small piece of plywood and place it in that area. The planks will give the sagging mattress more support.

  • Measure the sagging part of the mattress

The next step is to measure the sagging part of the mattress. You can use a carpenter’s level to find out which part of the mattress is sagging and then cut a piece of plywood to fit the measurement. If the sagging area is more than 0.2 inches, you should remove the plywood and replace it with the new one. If the sagging area is more widespread, you can add more layers of the plywood.

  • To level up the mattress

Before putting plywood under the mattress, make sure that it is level. It can be a little rough, but you can sand it with a sanding block and a little elbow grease to get the desired finish. You should also avoid jumping on the bed because this can result in severe back pain. But this method is much better than the other methods. It doesn’t only help fix sagging but also enables you to sleep better.

  • Measure the sagging area.

If you want to use plywood under your mattress, you should first measure the sagging area with your arms. This will help you identify the exact location where the sagging is happening. If it’s a large part of the mattress, you should place a piece of plywood on top of it for extra comfort. The plywood should be the same height, width, and thickness as the sagging section of the mattress.

  • Insert plywood to support the sagging part.

After you have measured the sagging area of your mattress, you should use plywood to support the sagging part. The plywood should be equal in thickness, height, and width. After that, you should install the plywood and test it to ensure that it has the proper fit. If the sagging area is still present, you can repeat the process. You should also check the mattress’s support with a rubber band.

  • Choosing the correct type of mattress.

Choosing the proper plywood is an essential step in fixing a sagging mattress. The type of mattress is critical in this repair, as it will determine the best thickness of plywood for the sagging part of the mattress. To use the correct plywood, you need to know the size of your mattress and the length of the sagging part of the mattress.  In modern mattresses, the sagging is not very common though. A sagging bed will require a lot of space.

  • Determine the correct type of mattress.

Before you start repairing your sagging mattress with plywood, you should first determine the type of mattress that you have. You can’t use the same technique on a waterbed, innerspring, or airbed mattress. You’ll need to use a different material if you’re attempting to repair a waterbed or airbed. A sagging bed can also affect the comfort of a bed.


Sagging Mattress may also cause other health-related issues such as people may suffer from severe back injury or back pain, due to sagging it may cause dipping, where the spine may take shape while sleeping, which may cause back pain or other chronic problems. It is said that using the wrong mattress can lead to difficulty in sleeping which may lead to memory loss and also have difficulty in concentration problems.

Sagging can be easily fixed when you’ve decided which type of mattress you have, and you can use a piece of plywood to correct the problem. You can use it to replace a box spring. Ensure that the details are the same height and width before installing the plywood. Then, place the plywood under the sagging part of the mattress to make it more firm. You can now sleep on a firmer mattress.

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