A lot of paints, adhesives and chemical materials which are known to emit gaseous chemical pollutants are being used in buildings. These building materials are potential sources of indoor chemical substances. Bake-out has been as one mitigation method for such elevated formaldehyde concentrations. The bake-out procedure could increase the transfer of indoor chemical substance from sources to the outdoor. The bake-out hypothesis is that this source depletion is sufficient to cause formaldehyde emission rates to be significantly less than they would have been without bake-out. So, this study was conducted 1) to establish the bake-out procedure and evaluation methods used with test pieces and an environmental chamber, 2) to determine the effectiveness of the bake-out on formaldehyde reduction, and 3) to analyze the relationship between specification of building parts and the reduction effectiveness on the sources by the bake-out. From our results, it turned out that the emission rate of formaldehyde was decreased by 6.54〜55.6% after bake-out in a temperature of 38℃ for the period of 72 hours. And, if we wish to determine the effectiveness of bake-out on the VOCs, further experiments used by chambers should be needed.
