Gypsum board in contact with the ground will absorb water pulverization?

Hello, glad to answer for you A: gypsum board time will be pulverized but to gypsum board for ceiling need to be installed with keel, some ordinary gypsum board used for a long time will occur pulverization. The waterproof principle of waterproof gypsum board is that the gypsum core and face guard paper are treated with moisture-proofing, and silicone oil is added to wrap the gypsum core. The waterproof coefficient of waterproof gypsum board is not very high, and the water absorption rate is generally 5%, which is suitable for places where the relative humidity does not exceed 95%. Waterproof gypsum board is mainly used to prevent the entry of indoor water vapor, by applying a layer of waterproof paint on the surface in order to block the moisture and protect the gypsum board from moisture penetration. However, in many cases, the back of the waterproof gypsum board is not coated with a layer of waterproof paint, once the upstairs tenant leakage occurs, then it is very likely to jeopardize the gypsum board ceiling of your own home. As the plasterboard ceiling sealing is relatively tight, if a small amount of water leakage is difficult to be found in time, so it will make the moisture for a long time soak the plasterboard, and will lead to plasterboard chalking.