Hello! Dealing with a sagging sofa can be a real pain, especially when the cushions are attached. It's a common problem, but thankfully, there are a few ways to tackle it and bring back that comfy support. The provided context didn't offer specific instructions, so I'll draw on my general expertise to guide you.
The first step is to figure out what's causing the sag. It's usually one of two things: either the cushion filling has compressed, or the support system underneath has weakened.
To fix the cushion filling, you'll need to get inside the cushion. Look for a hidden zipper along the back or bottom edge where the cushion meets the sofa frame. If you find one, you can open it up and add more stuffing. Wrapping the existing foam insert with a layer or two of polyester batting is a great way to restore its plumpness. If the foam is completely worn out, you can take it out and buy a new piece of high-density foam cut to the same size. If there's no zipper, you may need to carefully open a seam with a seam ripper, add the new filling, and then sew it back up by hand with a sturdy needle and thread.
If the cushions seem okay but you're still sinking, the problem likely lies with the support system. You'll need to turn the sofa over to inspect the springs or webbing underneath. Sometimes, the S-shaped springs just pop out of their clips and can be reattached. If the springs are broken or the webbing is stretched out, these will need to be replaced, which is a more involved upholstery job. For a much simpler and quicker fix, you can buy a sofa support board or have a thin piece of plywood cut to fit under the cushions. You just slide this board directly under the attached cushions to provide a firm, even base and instantly reduce the sagging.
