Interior finishing works may be started after the special works inside the structures have been finished and the structures have been closed. Interior finishing works are not related to the structure of the house and they start several weeks after the installation works have been completed. Before starting the interior finishing works it must be made sure that the temperature and humidity in the rooms meets the relevant standards. For this reason it is a good idea to begin extracting excessive humidity from the building as soon as its structure has been sealed. Although the biggest source of humidity is the reinforced concrete of the slab foundation, large amounts of water will also be introduced during the interior finishing works due to the use of mainly water-based finishing plasters and paints.