spring seat feels unstable when sit down
How are you? My client complained about his custom made chair. seat feels lumpy when he sat down. I opened it up and found bonded foam. So I changed it out to HD foam. Client wants to keep original fabric. after pulled old foam off, change burlap, add cotton add foam and dacron then wrap old fabric back. When client sit downs, he feels:- 1)the crown in the center too tall 2)the springs action seems bouncy 3)the overall seat feels unstable. From what I remember, the crown of the chair is very low. I'm using firm 2.8/43 ILD foam as client wants his seat firm. too firm? How do I fix the problem. Im thinking Could it be because the chair does not have edge rolls installed? I can add edge roll all around, add more cotton along perimeter to offset the crown the add foam. do I need to use deck padding (the corse one)? Please kindly advice.
here is the pictures of the chair
Great to hear from you. Thank you for finding me again!! And thank you for the photos.
First what type of springs are in the chair. If they are zig-zag springs, you are going to get a bouncy feel.
The foam you're using is definitely a "firm" foam. Foam is always such a difficult decision as to what is soft, medium or firm. The specifications are one thing, but when a client asks for firm foam, they may not be asking for firm based on the foam specifications. So it's a difficult decision for the upholsterer to determine exactly what the client means by firm. If the springs are zig-zag, then a firm foam would help reduce the bouncy feel.
I think an edge roll would help. Based on the thickness of your foam, I would use a 1 1/4" edge roll. The edge roll will help flatten the crown. And as you say, you will need to fill in the space between the crown and inside edge of your edge roll with cotton batting before you put the foam in place.
If the springs are zig-zag springs, have you considered replacing them with coil springs. I know it would add quite a bit of cost to the project. But it would solve the issues with the springs feeling bouncy.