Sagging does not always mean the sofa is worn out
Cushion foam softens with use, and loose fill can migrate away from high-contact areas. If the frame and upholstery remain serviceable, rebuilding the cushion core can improve support without replacing the complete sofa.
Choose support based on the existing cover
A replacement insert must fit the cushion boxing and zipper opening. Density, firmness and wrap affect how the cushion sits, how the seams align and whether the finished seat feels balanced with adjacent cushions.
- measure the complete cushion
- inspect the cover and zipper
- compare all matching seats
- confirm the preferred firmness
Photos help separate foam problems from frame problems
Show the sofa with and without the cushions if possible. A sag that remains after the cushions are removed may involve webbing, springs or the frame and needs a different assessment.