STEP TWO: CUT APART YOUR SOFA
My top cushions are removable and separate from the couch but my bottom cushions aren't. It was easy to unzip the top cushions and see how they were pieced together but it was a little scary to start cutting the fabric off the bottom cushions. Once I started to peel back the layers though I figured out how the couch was put together in the first place so I could recreate it.
(the couch before I started)
Even though it was kind of scary to start cutting off the first piece, my advice is once you are committed, just go for it. Be sure to get just the top layer.
Once I peeled back the top layer I could see the batting.
The batting was ripped and worn and I could see that the foam underneath was ripped and worn too. I took off the batting, exposing the foam underneath.
Once I peeled back the top layer of foam I could see a thin layer of rebond foam and a layer of interfacing covering the springs. In the most well-used areas, the springs were poking through both the interfacing and the rebond foam. The top layer of foam was also in bad shape so I decided to replace the foam as well.
I used a high-quality, high-density foam to help extend the life of the sofa. I used 2-inch thickness, which was slightly thicker than the 1-inch foam they used on the original sofa but I wanted it to last and be comfortable. Use what works for you and your sofa. When replacing foam, I suggest you use high-density foam which will last longer and use the thickness or only slightly thicker than the original foam that was used to make your couch.
All the layers had been spray-glued together but it was still possible to peel them apart. I kept the thick foam that ran along the sides of the springs on the outside of the couch and only replaced the top piece. Every couch is different so disassemble your couch and recreate whatever has been done before.
I carefully peeled off the top layer of foam and used it as a pattern to cut my new piece with fabric scissors. You can also use an electric knife to carve the foam but I only had the fabric scissors, which worked well as long as I cut slowly and carefully.
On one side of my sofa, the foam wasn't thick enough to do in all one piece so I just did two pieces and spray glued them together. Once it was covered in batting and upholstery fabric you couldn't even tell the foam was pieced together.
After the foam was all cut, I spray glued the new interfacing fabric in place over the springs, then the rebond foam, followed with spray gluing the high-density foam in place.
I left the pleather fabric on the very bottom section as well as along the back because I decided it would be easier for me to just staple the fabric over it. Do what works for you.
Now I was ready for STEP THREE!