First, the amount of waterproof coating (kg) = waterproof area (m2) × unit area (kg / m2) × brushing layer.

Waterproof area, which is the total area that needs to be painted with waterproof coating. According to the design requirements, the size of each part is measured and calculated. If the bathroom wall surface waterproofing is generally required to be 1.8m high, the floor is fully coated, then the bathroom waterproof area = (ground perimeter – door width) × 1.8m + floor area; kitchen wall waterproofing is generally required to achieve 0.3m, the ground is full Painted, kitchen waterproof area = (ground circumference – door width) × 0.3m + floor area.

For the unit area of ​​waterproof coatings, manufacturers generally have direct reference data, but the actual construction often varies due to the base surface and the painting process. If the base surface is flatter, the amount is less. The coarser the amount, the more the roller brush is more material than the brushing. The construction should be calculated flexibly according to the actual situation.

Second, the use of various types of waterproof coatings, painting 1.5MM thick, the material theoretical budget is required as follows:

(1) Acrylic, 3 kg/m2 per square meter
(2) Polyurethane: the dosage is about 2 kg / m2
(3) Polymer polymer: the dosage is about 3 kg / m2
(4) Flexible cement mortar: the dosage is about 3 kg / m2

Third, how high the waterproof coating should be applied to the home improvement

In general, the kitchen bathroom is the focus of home improvement waterproofing. The ground is of course to be fully waterproof, and the wall will be different. The national standard is that the waterproof layer extends from the ground to the wall, 1 meter above the ground, and the waterproof layer of the bathroom wall must be no less than 1.8 meters. The regulations will change at any time in development, and in practice, they will not die. In China, showers are still commonly used. The walls are often exposed to water. The lightweight walls in the space are easy to seep. If the back of the wall is a study or a large closet, it is recommended to brush to the top. The scientific construction height is also directly brushed to the top. In practice, due to construction habits (brushing to the top of the ladder), and economic conditions (both want to save money), the average height of only one adult is 1.8 meters.

Fourth, the coating of waterproof coating has a great relationship with the ground conditions of the ground. The more uneven the base layer, the more paint is used. Therefore, before applying the waterproof coating, it is better to simply treat the base layer and smooth the base layer as much as possible. Secondly, it should be ensured that the ground is dust-free, soil-free and oil-free. The mop can be carefully mopped to remove all the dust, otherwise it will cause cracking and peeling of the waterproof coating and affect the waterproof effect.

Fifth: Detail processing:

1. Yin and Yang angle: the joint between the ground and the wall should be smeared into an arc with a radius of 20mm.

2. Tube root part: After the root of the wall is positioned, the floor slab is sealed with cement mortar, and the joint around the tube root and the ground is smeared with a cement mortar.

3. The wall-through pipes and connecting parts should be installed firmly and the joints should be tight. If there is rust and oil, it should be cleaned with wire brush, sandpaper and solvent.

Waterproof layer construction:

1. Requirements for the base surface before construction: It must be leveled, and there must be no defects such as holes, grooves or the like.

2. Before the construction, the wall surface needs to be sprinkled with water to remove the gas in the wall hole, so that the wall surface is denser and the surface is more permeable.

3. When the powder and liquid materials are stirred, use an electric drill and park at a constant speed for 3-5 minutes. If it is artificially stirred, it needs to be stirred for about 10 minutes, then parked for 10 minutes before use.

4. When using, if there is air bubble in the slurry, you need to brush the air bubbles, there must be no air bubbles.

5. Note: Brushing, once only need to brush in one direction, the second time in the opposite direction.

6. The interval between the first and second passes is preferably about 4-8 hours.

7. The façade is not easy to brush out the thickness, and it can be painted several times. When the brush is applied, it will produce a hole of about 1.2-1.5mm, so it needs to be brushed to increase its compactness and fill the void density.

8. Check whether the waterproof is qualified

After the waterproofing project is completed, seal the door and the drain, fill the water in the bathroom floor to a certain level, and make a mark. If there is no obvious drop in the liquid level within 24 hours, there is no roof in the house downstairs. Leakage occurred and water resistance was qualified. If the acceptance is unqualified, the waterproof project must be redone and re-inspected. After confirming that there is no leakage point, lay the floor tiles again.

Experience: For the acceptance of lightweight wall waterproof construction, the water spray test should be adopted, that is, the water pipe should be sprayed continuously from top to bottom for 3 minutes on the wall surface of the waterproof coating, and another wall after 4 hours. Whether there will be penetration on the side, if there is no penetration phenomenon, the wall waterproof construction acceptance is considered qualified.