Asbestos was commonly used in building materials as it has good sound absorption qualities, explaining why it may be found in walls. All forms are pernicious and may lead to lung cancer or fibrosis following prolonged exposure. Although, its existence does not necessarily constitute a risk to health. However, if discovered, you must never remove it yourself and seek professional advice immediately. Surveyors cannot tell you whether asbestos is in the property but will report on the potential of it being present and should inform you of the options.