The hooker recently returned from a serious spinal injury, but will miss this weekend's match after being plagued by a calf strain that kept him out of the recent loss to the Tigers.
Warriors coach Stephen Kearney says they're very mindful of what Roache has been through over the past couple of years.
He says Roache is sensitive to what his body's telling him and they didn't want to take any unnecessary risks.
In a further blow, the Warriors will be without Sam Lisone for the next two games.
The forward was found guilty of dangerous contact for a tackle on Thomas Mikaele during the club's loss to the Wests Tigers.