Window frames painted with lead-based paint can be a significant exposure risk. Friction from opening and closing these windows can easily release lead dust that can collect on windowsills and other nearby surfaces. Any home renovation that disturbs lead painted surfaces can release very dangerous amounts of lead dust into the environment. Home renovations are a frequent cause of lead poisoning in children. Renovations should proceed only when those performing the work are well aware of the hazards and knowledgeable about procedures used to reduce the risk.
Some states require contractors who remove lead paint to be licensed.
Any plumbing system that includes lead pipes or solder is another source of lead. Lead plumbing components contaminate water used for drinking, cooking, and bathing. Food becomes contaminated when prepared in leaded water. Have paint tested if it is a suspected source of lead. Currently there are three methods of testing for lead in paint.