They're facing a potential ban right now. This is before the Ontario Labour Relations Board. As I understand it, it was two unionized workers working on a Saturday, building a shed of all things, when their union filed the application for certification through the card check system. This will, I believe, cut out just over 80% of the open-shop contractors in the Kitchener-Waterloo area.
On April 30th, 2013. See this statement in context.