There are a lot of factors that can affect indoor air quality. Excess moisture can lead to the growth of dangerous mold, and houses built before 1970 can contain both lead paint and asbestos. Even when painted over lead can still be a danger if the new coat wears away, something that happens often with doors and windows. Asbestos was widely used for many materials, from insulation to paper, cement, and cloth, and needs to be removed by a professional. Keep your environment safe with mold removal, mold remediation and mold testing.