Choosing foam for a sofa cushion can be confusing because the words density, firmness and quality are often used as though they mean the same thing. They do not. A foam can be firm but relatively low density, or high density but made with a softer feel. Understanding the difference helps you choose a cushion that is comfortable now and remains useful after repeated daily use. For most sofa seats, the best option is a good-quality, high-density upholstery foam in a firmness that suits the...

Get an instant price: Use our Foam Price Calculator to enter your dimensions, select a foam grade and see the current price online. Step 1: Check That the Foam Is the Real Problem Remove all loose seat cushions and sit gently on the bare support platform. Inspect webbing, springs and boards. If the base sags deeply or feels uneven, new cushion foam alone will not solve the problem. Repair damaged support first so the new inserts have a firm, level foundation. Next, examine the old insert....

Sagging sofa cushions can make an otherwise good sofa feel tired, uncomfortable and much older than it really is. The cover may still be in excellent condition and the frame may be perfectly sound, yet the seat sinks too far, takes a long time to recover or leaves you sitting unevenly. The good news is that many sagging-cushion problems can be improved without replacing the whole sofa. The right solution depends on whether the problem is the foam itself, the cushion cover, the support beneath...