Saggy cab roof-lining

The thin material is sagging on my roof-lining. I tried spray contact adhesive on a previous landy with no success so does anyone know a good fix? - I did wonder about a staple gun but wondered if would go through metal of roof!

Mine is suffering in the same way. Ive read that the foam layer between the hardboard and the outer fabric deteriates and crumbles away, causing the sagging.

Apparently the outer fabric needs to be removed, then the foam backing that has deteriated should be hoovered off, before gluing the outer fabric back in place.

But as I say, I havent done this myself yet, so cant say for sure.

Staple gun does work mate and doesn't damage the roof skin. Not pretty but works.

Reckon the staples have it then - too much hassle to strip lining down.