I do not know if you have encountered the phenomenon of wall leakage. Usually everyone faces panic when facing a wall leak. Then everyone knows what to do in order to make the wall waterproof . Next, Ou Yifeng Xiao Bian came to introduce you to the treatment methods of the waterproof wall surface and the key points of the waterproof construction on the wall . Let's take a look.
Wall waterproof principle
The waterproof mechanism of waterproof coating can be divided into two types: one is to form a complete coating to block the penetration of water or penetration of water molecules; the other is to prevent the moisture from passing through the hydrophobic effect of the coating itself. . After the polymer composite coating is cured, it can form a complete and continuous paint film. The width of the molecular gap is about several nanometers, and a single water molecule can pass through these gaps, but the natural water is usually in an associated state, dozens of Due to the hydrogen bonding between water molecules, a large water molecule group is formed. It is actually difficult for the water molecule group to cure the gap between the paint films through the polymer coating. This is the main function of the water-proof coating film which is waterproof. the reason.
Wall waterproof practice
1, base surface treatment is the basis
Base surface treatment is the key to waterproof construction. The base surface must be cleaned before construction to ensure that it is strong, flat, clean, free of dust, grease, wax, mold release agents, and other debris, such as voids, cracks, and other defects. , It must be repaired and leveled with cement mortar in advance, and the yin and yang angles should be rounded. Keep the base moist when there is no clear water.
2, brushing method should pay attention
Brushing force is uniform, be careful not to miss the brush; before and after the two times brushing to maintain the vertical intersection angle, in order to fully cover in place; single brushing should not be too thick, especially the nozzle and corner, can not exceed 1mm, to prevent dry After the solid cracks.
3, maintenance, protection is also important
After 24 hours of construction, it is recommended to use a damp cloth to cover the coating or spray water to cure the coating. Before treading, rainwater, sun exposure, and sharp damage are prohibited before it is completely dried. In particular, special care must be taken not to damage the waterproof layer during the subsequent installation of the sanitary ware.
4, carefully check the prevention and after suffering
Brushing must be meticulous, carefully check after brushing, especially the joints, yin and yang angle, nozzle and other parts; after the completion of the construction to do closed water test for 48 hours, close the water height as much as possible, not less than 20cm, carefully Check whether there is any traces of water or water on the ceiling below the floor. The light wall should be tested for water and check the back wall.
Wall waterproof construction attention points
1, waterproof coating to meet the thickness requirements of the premise, the number of brushing the more, the better the density of the film, so brushing should be brushing many times, whether it is thick waterproof coating or thin waterproof coating Do not paint once.
2. Each time brushing should be uniform, there must be no exposed, leaked and stacked phenomenon. When brushing many times, it should be dried and filmed before coating.
3. When the roof slope is less than 15%, the carcass reinforcement material shall be laid parallel or perpendicular to the roof, which shall be determined by the convenience of construction. When the roof slope is greater than 15%, in order to prevent the carcass reinforcement material from sliding down, it should be laid perpendicular to the ridge. When laying parallel to the ridge, it must be laid up from a lower elevation, and the carcass reinforcement is lapped in the direction of the flowing water to avoid drowning. When the body reinforcement material is applied, it should be brushed and applied to avoid separation.
4, in order to ensure the integrity of the coating waterproof layer, the long side of the carcass lap width should not be less than 50mm, short-edge lap width should not be less than 70mm, there is no need to press the waterproof web to meet the width requirements.
5. When using two layers of carcass reinforcement material, the upper and lower layers shall not be laid vertically, so that the two layers of carcass material have the same extension in the same direction; the upper and lower lap joints shall be staggered, not less than one-third width , To avoid heavy seams on the upper and lower carcass reinforcements and uneven thickness of the waterproof layer.
The above is the introduction of wall waterproofing methods and key points for wall waterproofing construction. Water seepage on the wall is not terrible. If the waterproofing of the wall is completed, it will be very difficult for such failures to occur. So if there is water seepage in the walls of everyone's home, Must do wall waterproof construction.
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