How to Fix a Saggy Sofa Quickly and Cheaply

Ever sit down on your couch and feel it dip like a tired mattress? A saggy sofa isn’t just uncomfortable – it makes your living room look sloppy. The good news is you don’t need a pricey upholsterer; most sag problems are solved with a few tools and some common‑sense tricks.

Check the Frame First

Most sofas have a wood or metal frame that holds the cushions in place. If the frame is loose, the whole seat will sink. Grab a screwdriver and open any removable panels or look under the seat for exposed screws. Tighten any that feel wobbly. If you find stripped holes, pop in a wooden dowel or a metal anchor – it’s cheap and gives the screw something solid to bite into.

While you’re at it, give the joints a quick inspection. Split wood or rusted metal can cause sagging over time. A small amount of wood glue on cracked joints or a fresh coat of rust‑inhibiting spray on metal can add back some strength without a full rebuild.

Boost Cushion Support

Even a perfect frame won’t stop cushions from flattening if they’re older or low‑density. The easiest fix is a “cushion insert.” Grab a piece of firm foam from a craft store or cut a section of a cheap mattress to the size of your seat. Slide it under the existing cushion – you’ll feel the difference instantly.

If you prefer a less invasive fix, replace the cushion’s inner core. Most cushions have a zippered cover; open it and swap the old foam for a higher‑density block. Look for foam with a density of 1.8‑2.0 lb/ft³ for a firm, long‑lasting feel.

For a quick visual lift, use a sheet of plywood cut to the exact shape of the seat and place it under the cushion. This spreads weight evenly and stops the cushion from sinking into the frame.

Finally, keep the sofa balanced. Rotate cushions weekly and avoid placing heavy items – like a laptop or a stack of books – on a single spot. Even distribution helps the cushion retain its shape longer.

With these steps you can turn a saggy, droopy couch into a comfy centerpiece again. It only takes a few minutes, a couple of bucks, and a bit of elbow grease. Your living room will look tidy, and you’ll enjoy a seat that actually supports you.