The use of black fiberglass scraps in construction work is generally not recommended due to safety and quality concerns. Black fiberglass scraps may contain impurities and inconsistencies that can compromise the structural integrity of the construction. Additionally, they can pose health risks due to the inhalation of fiberglass particles, which can cause respiratory issues. It's crucial to use high-quality, undamaged materials that meet safety standards to ensure the safety of both the construction workers and the longevity of the construction project.