Is the fiberglass used in cement foundations somehow safer than the fiberglass in wall insulations. I have had the reactions you are talking about, wheezing, loss of voise, coughing, that were relieved by albuterol inhaler, after working around the dust from my cement flooring. I am around the dust daily without protection since the building was constructed 20 years ago. I have multiple pulmonary nodules 6 mm and less, but growing and causing sob and low pulmonary oxygen when sedentary and when sleeping. The PET scan showed the nodules are cold.