In order to bond fiberglass, workers must first sand it to roughen the surface. This creates a fine dust that can cause inflammation and reduce lung function when inhaled. The dust also gets everywhere, creating a work area that is both visually unappealing and uncomfortable.
Because the parts that Polar works with are very large, working under a hood to contain the dust wasn't feasible. A large roof fan ventilation system helped to suck out some of the visible dust, but created a noisy environment and resulted in significant heat loss during the cold Alberta winters. Because ventilation was inadequate, workers had to wear uncomfortable respiratory protection equipment while working with the fiberglass.