“The indoor waterproofing must be safe, the base layer is solid and no bricks can’t fall”
This sentence is the requirements of the indoor bathroom waterproofing. If the strength of the base layer is low, the waterproof layer and the structural base layer are not firmly bonded. Under the self-weight of the subsequent protective layer and the facing layer, the phenomenon of empty drums and falling off will be caused, which seriously affects the normal life of the residents. The so-called solid can be understood as not sand, you can use the nail to peel off the surface of the base to see if there is cement grit off. If it falls off, it can be leveled and repaired with polymer cement mortar.

“The impact of dust is also great, and it can greatly affact construction.”
Before the waterproof construction, ensure that the base layer is clean and the presence of dust will isolate between the base layer and the waterproof layer. Waterproof coatings, especially organic waterproof coatings, have a large surface tension during construction and are not easy to infiltrate and spread. If dust is present, the coating cannot be fully bonded to the solid base layer. The waterproof coating still has the risk of falling off. A similar situation has occurred in the construction site. After the waterproof layer is formed into a film, a small amount of peeling is caused by a small tear, and the back is full of dust that has not been cleaned.

“Don’t have moisture, bulging is very anxious”
Here mainly refers to the organic coating film, the existence of the base layer of water vapor is very threatening to the organic waterproof layer, because the excellent organic waterproof coating is not only impervious to water, but also airtight. The waterproof coating substantially blocks the outlet of the base water vapor. Whether it is the evaporation of water vapor caused by the temperature rise during the new construction process, or the evaporation of water vapor caused by indoor heating. All in all, the water vapor in the base layer will evaporate sooner or later. Once the water vapor evaporates, the waterproof coating film will be topped by the water vapor pressure to the bulge and bubble state. Therefore, the water content of the base layer should be strictly controlled during waterproof construction.

“The large-scale construction is behind, priority is given to small nodes”
After the solid, clean, dry and other requirements of the base layer are reached, we can start waterproof construction. When doing waterproof construction, the node parts such as the inside and outside corners, the tube root and the floor drain should be treated first, and then the waterproof construction of the large surface should be carried out. The reverse of the process may result in node processing not being treated comprehensive enough, not detailed enough. The node is also a weak part of waterproofing, which is the most important thing. Therefore, this work should be handled well in the initial stage of construction.

“First brush a layer of paint and strengthen the mesh in it”
Here it is the method of node processing. For example, the inside corner, first brush the waterproof coating, then lay the reinforced mesh cloth. Brush the second coating again to ensure that the reinforcing layer is in the middle of the coating film, effectively protecting the waterproof layer from stress and other factors.

“It is recommended to apply waterproofing three times, dry and then do the next layer”
After the node is processed, it is possible to carry out waterproof construction of the large surface. Three times of construction can be adopted during construction, and the next construction will be carried out after each drying. If it is not dry, the coating film has no strength, and the coating film is seriously damaged during operation. In addition, the moisture in the undried coating will also cause damage to the waterproof layer.

“Paint the film twice and twice, and apply it vertically.”
In the process of coating, only one direction of the coating will cause some white spots to be unable to be effectively filled. The next coating method can effectively break the balance of the surface tension around the white point, which is beneficial to the spreading of the coating. Ensure the integrity of the film.

“The film protection is very important, and there is no banknote for rework.”
After the completion of the construction of all waterproofing work, it is necessary to carry out later protection. There are many examples showing that the closed water test after coating is guaranteed to not leak water, but there is still leakage in the closed water test after all the renovations are completed, which indicates that the damage of the later damage has great influence on the waterproofing. The construction of the protective layer and the installation of the building accessories must be reasonably arranged to minimize the impact on the waterproof layer.

“Two days of drying, the water shut-off test is safer”
Here is the question of when to do the water shut-off test after the film is dried. Whether it is an organic coating film or an aqueous coating film, the strength of the film has a process of increasing strength. Because the climate and weather conditions of different places are different, it is not possible to consider that the water shut-off test can be carried out two or three days after the film coating. It is recommended to confirm that the coating film is sufficiently dry before the closed water test, and the coating film has good strength and toughness.