How to Fix a Sagging Couch Springs?

  • You know how much pain a sagging couch can cause. When you bought it, it was so perfect. Now, it looks like it went through two wars and five floods. It’s sagging and a simple sitting on it became quite a challenge. 
  • What to do if you notice sagging on this fantastic new couch you enjoyed so much? Luckily, there are ways to act! 
  • A fix project we present in this post may require one or two visits to the shop, but at least you don’t have to buy a totally new couch! Stay with us to get familiar with furniture terms such as foam, frame, batting, and others.

A sagging couch issue

The sofa is often the central point of the living room, simultaneously also of family life. 

It may frustrate you to notice that your beloved couch is sagging.

We can clean a stain or spilled juice from almost all materials, but a changing shape of the furniture is harder to deal with.  

A sagging couch problem is much more common than you would expect. 

That’s why there are many solutions to this issue available online, and we can’t wait to share them.  

Luckily, we’re here with some relevant support. 

From this post, you’ll learn how long it takes to fix a sagging couch and how to do it. 

Our experience shows that even a passionate DIY can do it in less than ten minutes. 

But before we get to “how,” let’s take a minute to see “why.”

Why does your couch sag?

There’re three main reasons the sagging couch problem will inevitably happen also to you at some point. 

Cushions are sagging

They just do. It’s caused by the following two causes combined:

  • the core structure of sofa cushions, and 
  • the gravitation;

When you sit on your beloved sofa a lot, it starts sagging—you’ve got to accept it. The sooner you get to terms with it, the less frustrating it becomes. 

Remove the cushions from the couch and check if the sag is in the cushions or the couch frame.

If it’s just the problem with cushions, then the issue is simple to resolve.

Important: Check the “How To Keep Couch Cushions From Sinking?” post to know more about this part of the problem.

If seat cushions are flattened, and their shape leaves much to be desired, you can revive the situation by turning them around. 

However, the most effective fix is to utilize the new foam and wrap it with polyester or Dacron.

Springs are loose

Another reason for your piece of furniture to lose its shape can be located deeper—and we don’t mean it metaphorically—but underneath the seat cushions.

If you checked your cushions and they seem fine, sagging could be caused by the serpentine springs within the couch frame. 

How to fix sagging couch?

Often, it’s simple: the springs have come loose and need to be attached back to their clips. 

Tip: To prevent springs from loosening again, you should also secure them. 

But what serpentine springs are?

Sometimes also called zig-zag springs, they are long metal wires with multiple S shapes bent into them. 

They’re located inside the couch’s frame. 

Serpentine springs run from front to back—their job is to provide support, and their role is critical for the success of this mission.

Springs are broken off

Serpentine springs are made of a strong metal, but even they can break. 

However, it’s more common that they break off of their attachments to the wooden couch frame. 

When this happens, you can reattach springs together with twine or wire. 

However, the only solution for stretched-out serpentine springs is their replacement.

Fix sagging couch

To sum up, there are three reasons for a sagging couch:

1. Cushions are sagging—because it’s their nature to start sagging at some point. You can replace the foam to refresh the existing item;

2. Springs are loose—they need to be attached back to their clips. This minor springs repair will instantly stop cushions and the whole sofa from looking saggy. 

3. Springs are broken off—they usually break off of their attachments to the couch frame made of wood. Twine or wire should be enough to have a spring and a frame attached back together. 

Now, let’s put all of that into practice.

Inspecting the springs starts with removing the upholstery fabric. 

Are the springs broken or bent? This part of home improvement starts with getting to know the details. 

  • bent springs—you might repair them yourself with pliers,
  • broken springs—will call for professional help; 

And here is how it looks on the financial side:

Broken couch frame repair costs around $480 to $1,000. In addition, you need to spend $975 or more on reupholstery services. Replacement couches are $650 to $2,500. Maybe it makes more sense to replace them instead?

When it comes to the repair of a leather sofa—the cost can be up to $4,000 for the minor repair of broken springs and legs plus reupholstery services ($30 to $60 per yard for the fabric). A broken frame? This part may cost $1,000.

If your couch’s springs are sagging under the focused weight or on the entire length of your furniture, it may frustrate you to the point of dreaming about a new couch.

But wait until we share our tips to fix this issue! It may save you from breaking this special emotional bond you have with your favorite sofa.

Find out how to support couch springs without looking back with the guide below.

1. First, remove the cushions from the couch. 

You’ll need to get inside your couch. 

You can turn the couch upside-down.

Remove the couch legs by unscrewing them off counter-clockwise by hand. You can also use the screwdriver or drill.

Remove the black dust cover by carefully cutting it away. 

Pry away the staples that hold the dust cover to the couch’s wooden frame.

2. Fixing the problem will require the use of a staple puller. First, remove staples and pull the fabric back to expose the springs. Next, if there is batting on top of the springs—remove every staple from one side of the batting. Then, pull it aside to expose the springs.

3. Put on gloves and safety glasses. Grasp each spring individually. Sofa springs run horizontally from front to back. Each of them has a bracket on both ends. 

4. Pull the spring from side to side to check the metal brackets. 

5. You’ll understand that the brackets are loose if they rattle or move. When you find those, use a drill/driver to secure them. Drive 3/4-inch screws into holes in the metal bracket until the springs are fully attached to the sofa frame.

6. Take a single, paper-coated wire running from side to side that’s attached to each one of the springs. You need to check it out thoroughly. 

7. Pull and stretch it to indicate where wire clips attached to individual springs loosened. Then, take diagonal pliers to pull the bent clip off the spring.

8. Place a new clip over the spring together, and compress the clip shut. Then, fold the batting back over the springs. 

9. Use a staple gun and 1/2-by-1/2-inch upholstery staples to reattach the batting to the sofa frame.

10. Fold the light fabric over the batting. Then, reattach it with the staple gun.

11. Now comes the math part. First, measure the length and width of the light fabric. Then, subtract 6 inches from both measurements. 

12. Use a table saw (we guess you have one in the basement, right?) to cut a piece of 1/8-inch-thick luan plywood for the measurements. 

13. You can ask a manually skilled friend to help you with this. Sand and round the corners and edges of the plywood by hand using 100-grit sandpaper. Sand one side of the plywood smooth using an orbital sander and 120-grit sandpaper.

14. Place the plywood on top of the light fabric (sanded side up). Center it side to side. Push it flush to the back. 

15. Place the cushions on top of the plywood.

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Frequently Asked Questions

Foam wrapped in a layer of fiber (SupaWrap) is considered the most recommended seat cushion filling. It's known for providing the support of foam and the softness of the fiber. What's more, it's also cheaper than feather wrap. The look of this mixture will have clean, smooth lines of foam and the added plumpness of fiber.
It's the fabric padding between two layers of upholstery covering. It's usually made from materials such as foam, cotton, or polyester. The choice of a batting fabric should go together with the intended use the furniture will have.
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