How to Fix Couch Cushion: Simple Fixes for Sagging, Flattened, or Loose Cushions

When your fix couch cushion, the process of restoring sagging, flattened, or loose sofa padding to its original shape and support. Also known as couch cushion repair, it’s a common household task that saves money and extends the life of your furniture. Most people think they need to buy a new sofa when the cushions lose their bounce—but that’s rarely true. A little elbow grease and a few basic tools can bring your couch back to life. Whether it’s the foam inside has broken down, the filling has shifted, or the cover is loose, these issues are fixable without calling a pro.

One of the biggest reasons cushions go flat is foam density, the measure of how tightly packed the foam material is, which directly affects how long it holds its shape. Low-density foam, often used in budget sofas, compresses over time. Replacing it with high-density foam—usually 1.8 lb/ft³ or higher—makes a huge difference. You can buy foam by the inch online and cut it to fit. If your cushion has a removable cover, unzip it, pull out the old foam, and slide in the new piece. It’s that simple. Another common problem is cushion refilling, adding new stuffing like polyester fiberfill or down blend to plump up worn-out cushions. This works well for cushions that feel hollow but still have good foam underneath. Just remove the old filling, add a little at a time, and sew it back up. Don’t overstuff—too much can make the cushion bulge unnaturally.

Loose covers are another headache. If your cushion cover slips or bunches up, it’s usually because the inner insert isn’t secured. Sewing small ties or Velcro strips inside the cover to attach to the foam can keep everything in place. Some people even use non-slip shelf liner between the cushion and cover to stop sliding. And if your cushion has piping or decorative buttons, check those too—they often come loose before the foam does. Tightening a few stitches can make the whole thing look brand new.

You’ll find plenty of real-life fixes in the posts below. From step-by-step guides on replacing foam to tips on choosing the right stuffing for your lifestyle, these articles cover what actually works. Whether you’re dealing with a worn-out sectional, a dated loveseat, or just one stubborn cushion that won’t bounce back, there’s a solution here that fits your situation. No fluff. No guesswork. Just clear, practical advice from people who’ve been there.