i tried adhesive on mine but because of the thin layer of foam, it would just sag again...so what i done is took roof out, stripped it, took old foam off, bought velour material from spotlight, spray contact from bunnings, and re did it, looks good, make sure you wipe over cardboard with clean cloth with maybe metho or turps just so the glue makes good contact...and be gentle with the cardboard taken out and puttin back in, can create kinks if your too rough...hope this helps