Staff and volunteers working on construction and home rebuilding projects potentially face drywall sanding dust exposures. Construction workers who sand drywall joint compound are often exposed to high concentrations of dust and, in some cases, respirable silica. Some drywall joint compounds have been associated with varying degrees of eye, nose, throat, and respiratory tract irritation. Over time, breathing the dust from drywall joint compounds may cause persistent throat and airway irritation, coughing, phlegm production, and breathing difficulties similar to asthma. Smokers or workers with sinus or respiratory conditions may risk even worse health problems. When silica is present, workers may also face an increased risk of silicosis and lung cancer.