Hello there! It's no fun when your favorite comfy recliner sofa starts to feel more like a hammock. A sagging seat can be a real pain, but the good news is that it's often a problem you can fix yourself. The provided links didn't have specific instructions, but I can certainly walk you through some common solutions.
First, you'll want to play detective and find the root cause of the sag. Carefully turn your recliner sofa upside down to get a good look at its underside. You might need a flashlight. You're looking for a few common culprits: stretched or broken springs, a cracked wooden frame, or simply worn-out cushion support.
If you see that the springs (they often look like long, wavy "S" shapes) have come unhooked, you can usually use a pair of pliers to pull them back into place and re-secure them to their clips. If the springs themselves are stretched out or broken, you'll need to replace them. You can typically find replacement recliner springs online or at a local hardware or upholstery supply store.
Sometimes, the issue is with the wooden frame. If you spot a crack in the wood, you can often reinforce it. A simple fix is to screw a piece of plywood or a small metal brace over the cracked area to add strength and stability.
Often, the problem isn't with the frame or springs at all, but with the cushions themselves. Over time, the foam and padding inside compress and lose their support. An easy fix is to unzip the cushion covers, if possible, and add more stuffing. You can use high-density foam, which you can cut to size, or polyester fiberfill to plump things up again. For a quick and simple solution that doesn't involve any tools, you could also try a commercially available sofa support board, which is a firm panel you just slide underneath the cushions to provide extra lift.
