When the fire resistance period of existing timber floors is required to be increased and considering the accessibility of work to be carried out, our Upgrading Existing Ceiling From Below System and Upgrading Existing Ceiling From Above System using SUPALUX^® board can apply for this application. For more information, please see pages 113 to 114 in Chapter 4: Ceilings, Floors and Roofs of our Passive Fire Protection Handbook.