How to Keep Your Couch Firm and Comfortable

If your sofa feels floppy or the cushions keep sinking, you’re not alone. Most people notice a sag after a few months of use, and it can make the whole room look tired. The good news? You don’t need to replace the whole couch. Simple tweaks, a few tools, and a bit of know‑how can bring the firmness back.

Identify Why Your Cushions Are Sinking

First, find the cause. Common reasons include:

• Loose or worn‑out foam: Over time the foam loses its bounce.
• Broken springs or webbing: The hidden support system can wear out.
• Uneven weight distribution: Sitting in the same spot daily creates pressure points.

Knowing the problem helps you pick the right fix.

DIY Solutions to Restore Firmness

1. Add a plywood board. Lift the cushion, slide a thin piece of plywood between the cushion and the frame, then replace the cushion. This adds a solid base that stops the foam from flattening.

2. Use foam inserts. Cut a piece of high‑density foam to the size of the cushion’s interior and tuck it in. It boosts support without changing the look.

3. Replace broken springs. If you feel a clicking sound or see visible gaps, remove the old spring and insert a new one that matches the original gauge.

4. Rotate cushions regularly. Turning them 180 degrees every few weeks spreads wear evenly and keeps the couch feeling balanced.

5. Reinforce with zip‑tied straps. Thread a sturdy strap around the frame and the cushion core. Tighten it so the cushion sits snugly, preventing it from sliding down.

These fixes cost under $30 in most cases and can be done in under an hour. If you’re not comfortable pulling springs, stick to the board or foam insert—both are safe for beginners.

Want more ideas? Check out our post "How to Prevent Couch Cushions From Sinking: Easy Fixes for Sofas" for a step‑by‑step guide, pictures, and a printable checklist.

Keeping your couch firm isn’t just about looks; a supportive seat protects your back and makes guests feel welcome. Try one of the tricks above, and you’ll notice the difference the next time you sink into your sofa.