There are two ways to apply the ticking fabric:

  1. cut the ticking fabric the same size as the outer upholstery fabric and apply them together as a single piece in sewing or stapling (I sometimes sew sew or serge the two layers together at the edges prior to working with it).
  2. apply the ticking fabric separate from the upholstery fabric – for example, sewing an  inner cushion cover, completely separate from the outer cover.

See also ‘What is ticking fabric and why do I need it?’