This is an alternative material to the OSB sheet, which is also used in the same way as the OSB, and in most cases is fixed to the outside of the main structure of the keel, but can also be used as a decorative material. The main components of this material to silicon and calcium, compared to commonly used OSB, calcium silicate plate has better fire resistance, it is an A1-level non-combustible material, in high temperature and high humidity environment is not easy to deform. This makes sense, and the price of this material is also higher than oSB.
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