Prevent Sinking: Keep Your Sofa Firm and Comfortable

If your couch feels like a pancake after a few months, you’re not alone. A sagging sofa isn’t just an eyesore – it can hurt your back and ruin the look of your living room. The good news is most sag problems are fixable with a few simple steps. Let’s break down why sofas sink and what you can do right now to stop it.

Check the Frame and Springs

The frame is the backbone of any sofa. If the wood or metal is warped, the cushions won’t have a solid base and will dip under weight. Open the bottom panel (if you can) and give the frame a wiggle – any loose joints need glue or screws. Springs are another weak spot; they lose tension over time. Replacing outdated coil springs with high‑grade sinuous springs can add years of bounce.

Choose the Right Cushions and Fillings

Cheap foam is the main culprit behind sagging cushions. Look for high‑density foam (at least 30 lb/ft³) or a blend of foam and pocketed springs. If you love a plush feel, add a layer of feather‑blend on top of firm foam – the feather layer gives softness while the foam holds shape. Swap out old cushions every 5‑7 years; even the best foam breaks down eventually.

Another quick fix is to add a plywood board under the seat cushions. Cut a piece that matches the sofa’s dimensions and slide it under the cushions. This creates a firm platform and prevents the cushions from bottoming out on the springs.

Weight distribution matters too. Avoid placing all the heavy furniture or a TV stand on one side of the sofa. Evenly spread out foot traffic and don’t let pets constantly jump onto the same spot. When you rotate cushions weekly, you let the foam recover and reduce uneven wear.

Keep your sofa dry and clean. Moisture weakens wood joints and can cause rot, which leads to sagging. Use a breathable slipcover and vacuum the cushions regularly to keep dust from packing into the foam.

If you bought a sectional, check the connecting brackets. Loose brackets cause one section to sag while the other stays firm. Tighten all bolts with a screwdriver or call a professional if the hardware is stripped.

Finally, consider a professional re‑upholster if the frame is solid but the cushions are beyond repair. A fresh set of high‑quality cushions can revive a tired sofa without buying a brand‑new set.

By tackling the frame, springs, cushions, and everyday use habits, you can keep your sofa from sinking for years. A firm couch not only looks better – it supports your back, boosts your home’s style, and saves you money in the long run.