What is the best waterproofing of a bathroom under a tile?
Waterproofing in the bathroom will 100% fulfill its tasks, if done correctly. It is necessary to place it on the entire floor area with an entrance to the walls of 20-30 cm, and also provide coverage in the area of all plumbing fixtures so that it goes to the sides and upwards from the edges of the plumbing by 50 cm. In a word, it is necessary to waterproof all areas on which water may get in. Of particular note is a plumbing cabinet with risers, where leaks can often occur.
Many apartment owners prefer to do combined waterproofing of the floor, as they consider it the most reliable option. In this case, the work is carried out as follows. If the screed is quite old, it must be removed, clean the surface, coat the concrete contact with a primer and wait for it to dry. Then set the screed at least 3 cm high and put the reinforcing mesh inside. After a week, she should dry. It will be necessary to remove the dust and primer it in 2 layers. Then under the floor at the corners and sides where the walls are joined with the floor, you will need 1 layer of coating waterproofing of any kind. After all this has dried, the corners are glued with a waterproof film and already on top of the coating waterproofing mixture, the entire floor is covered with a little grabbing the walls, 20-30 cm high.Thus, a three-layer insulation is performed with good drying of each layer. After the last layer, concrete contact is applied. After a day, you can pour a second screed with a thickness of 1.5 cm or more. When it dries, you need to apply a primer, after which you can lay the tile.
Wall waterproofing is usually performed with cement-polymer mixtures. To do this, primer the surface in 2 layers, carefully working out the corners and sections where the pipes pass. It is necessary to provide them with protective cuffs, glue the corners with waterproofing tape, and coat the necessary sections of the wall with a waterproofing composition. When it dries, cover with concrete contact, which improves adhesion to the tile adhesive. Often, hydroprotection for greater strength is also provided with a reinforcing mesh. When all the layers dry, you can start the exterior finish.
In general, we can say that when performing a moisture-proof layer for finishing the bathroom, you should not save on materials, because usually with such work the price and quality are directly related.