[Pollution of room air by building materials]

Due to better insulation and airtight windows and doors, the supply of fresh air is reduced. Therefore the pollutants which are continuously emitted from different materials into the room air are considerably increased. Measurements of the formaldehyde concentrations in new buildings have shown that after a year the admissible limits are still exceeded. Stricter regulations are necessary to limit the emissions of building- and insulation materials.