Indoor air pollution by chemical substances from construction materials has caused a health hazard. It is necessary to take countermeasures for the prevention of health hazard. Bake-out is one of the measures for indoor air pollution. However, reports on a relation between chemical substance quantity of construction materials and effects of the bake-out are little. The purpose of this study is to examine a reduction effect of bake-out against chemical substances contained in construction materials. In this study, we experimented with the test peaces of construction materials. In the case of the construction materials short after the manufacture, TVOC concentrations were reduced about 30%-40%. On the other hand, in the case of the longer ones, there are poor reduction effects. Moreover, in the case of high-concentrations of Alkanes and Archols, their are reduced easy. However about the concentration of terpenes, it increased a little soon after bake-out.
