a brand new sofa cushion with a hardness of 200 Newtons will be extremely hard on day one, however after several weeks of use you will find it start to soften off a little; after several years of use it will have softened considerable compared to when it was brand new.
How do you break in a couch?
Sit on your sofa as much as possible throughout the day to squish the cushions under your weight. Bounce up and down a few times to compress the cushions and break down the foam insert a little. Shuffle the cushions around and flip them periodically so they soften evenly.
How can I make my sofa more firm?
- Insert a piece of plywood under the cushions.
- Add a layer of high-resiliency foam underneath the seat cushions.
- Remove the cushion covers and replace the internal foam or polyester fill with new, firmer material.
Is there a way to make couch cushions more firm?
Adding extra foam is the easiest way to firm up sofa cushions. There are a few ways to do it. If your couch cushions have zippers it's very easy to add extra foam. Simply unzip the cover and add the desired amount of foam.