How to do the bathroom waterproof 2 times

The second waterproofing of the bathroom is also called the secondary waterproofing. The premise of secondary waterproofing is to install the pipes in the cinder pool and backfill the cinders for waterproofing. Usually cement mortar is used to base first, and then oily waterproof materials are used to paint to achieve waterproof effect.

The secondary waterproofing requirements are relatively high, usually brushing waterproof paint at least three times in both directions, and especially the treatment of the main raised pipes and corners.

Text: @ELMejor Zhao Lei.

90% of the backwater phenomenon in the bathroom belongs to "not operating according to the construction standards", which is artificially caused: afraid of trouble and trying to save trouble, not using professional plugging materials or using construction that does not comply with the prescribed technical standards, and some even do not do the second waterproof coating work after leveling the construction department. Finally, it leads to water seepage in the middle layer (interlayer), causing unnecessary trouble.

(1) About the "threshold stone".

See the diagram below.

1. The threshold stone must not be made (water stop beam) below, and the threshold stone should be wet paved instead of dry paved, and at the same time, it is necessary to pay attention to hollowing and blistering, so it requires skilled and excellent technology.

2. The practice of laying floor heating (waterstop beams):

A- After determining the orientation, the length should be consistent with the door frame, and the floor heating insulation mat (blue) should be cut off at the width of 150mm; Or inform the site to reserve the space according to the specified size.

The insulation strips (telescopic strips) at 100mm on both sides of the B-door sleeve are removed, and then the waterproof beams are made of cement concrete. And it forms an integral connection pouring with the plain ground. Finally, brush the waterproof paint twice.

(2) About the marble water retaining strip in the shower room

See the diagram below.

1. First of all, the experience room is tested and determined that the original building foundation is waterproof. Then, under this premise, the builder should use "water leakage" to make the R corner of the bathroom floor wall corner and the entrance of the drainage pipe for 4 weeks before waterproof construction (remember to do waterproof coating construction); Reapply the waterproof paint to ensure that nothing is lost.

2. If the floor is grooved due to the displacement of the toilet, then first brush both sides of the waterproof in the slot, and then do the above work, and then carry out the waterproof coating work of the whole room again.

Secondary waterproofing is an important supplement to primary waterproofing, setting up another umbrella for the family.

Secondary waterproof construction suggestions: make a protective layer of 2-3cm height with cement mortar on the waterproof layer made by the developer, and then do a waterproofing, and the waterproof construction needs to be carried out according to the specifications of the instructions for the use of the product.

Base (substrate) treatment requirements.

The substrate must be firm, flat and clean, free of dust, greasy, wax, release agent and other debris substances;

If there are pores, cracks and unequal defects on the base surface, it must be repaired and smoothed with cement mortar in advance, plastic strips are recommended to be pasted on the expansion joints, a layer of non-woven fabric must be added to the nodes, and the nozzle is recommended to be filled with nozzle grout;

The yin and yang corners should be wiped into an arc shape (or V-shaped);

Make sure the base surface is sufficiently wet, but there is no open water;

How to use waterproofing slurry.

Stirring: Pour the liquid into the container first, then slowly add the powder, and stir fully for 3-5 minutes until a homogeneous slurry without raw flour and particles is formed. (It is best to use a blender).

Brushing: Brush directly on the base surface with a brush or roller brush, and the strength should be used evenly, and the brush should not be missed; Generally, it needs to be brushed twice (according to the requirements of use), and the thickness of each brush should not exceed 1mm; After the previous one is slightly dry, the next one is brushed (just non-sticky, generally at an interval of 1-2 hours), and the front and rear vertical cross brushing, the total thickness of the brush is generally 1-2mm; If the coating has already cured, moisten it with water first when applying another layer.

Curing: After 24 hours of construction, it is recommended to cover the coating with a damp cloth or spray water to cure.

Protection: Before it is completely dry after construction, please take protection against trampling, rain, exposure to the sun, sharp damage, etc.

Inspection (closed water test): Toilets, pools and other parts should be filled with water for 48 hours after the waterproof layer is dried (at least 24 hours in summer, at least 48 hours in winter) to check whether the waterproof construction is qualified. Lightweight walls must be tested for watering.

First of all, it is necessary to see whether your bathroom is caisson type, if it is to be backfilled with ceramsite after a waterproofing, and after filling it up, it is necessary to brush the second waterproof on it after doing leveling.

The two waterproofing of the bathroom you mentioned should be the first time in the bathroom backfill pit, and the second time after the special ground backfill leveling. It is recommended to use mortar waterproofing agent, which is not only firm with the base surface, but also has high puncture resistance, and the waterproof life can be the same as the life of the building, which is now a commonly used material in home decoration waterproofing!

Bathrooms generally have sunken.

The sinking needs to be filled. Before filling it up, do a waterproofing first, that is, in the sunken ground.

After filling in the answer, before putting the tiles, do a waterproofing on the ground again, and you can put the tiles.

The waterproofing of the bathroom, the floor is done, and the wall is also done. There is a position for the shower shower, and there is a cabinet on the back of the wall, which is generally a meter high. For other walls, just make them 30 cm high.

1.Do a good job in hydropower infrastructure projects

From a safety point of view, it is better to go up the bathroom water pipes and wires than to go down. However, many "guerrillas" are greedy for labor-saving, and water and electricity go to the ground, and even dig grooves and round holes in the bathroom.

2.Clean the base and walls:

The house is decorated with waterproof, involving a balcony, a kitchen, a bathroom, but the focus is on the bathroom. First of all, use a small metal hammer to knock on the wall and ground, if you find a "poof" empty sound, it means that there is a hollow drum inside, and you must knock out all the hollow drum parts. Then carefully clean the four wall base and the ground, pull out the nails, clean up the miscellaneous garbage, preferably rinse it with clean water, and then let it dry.

3.Do a good job of rigid waterproofing:

All kinds of sewer pipes in the bathroom can not be changed, try not to change. In case of change, you must not use cement mortar to fill the pores, and you must plug the leakage king to fill it three times. The most leaky areas in the room are the four sides around the sewer pipes and the corners of the walls, so these key areas should be paid special attention.

The ground should also be divided into three blocks around it, and there should be intervals. In this way, a rigid layer of waterproof armor was worn on the ground. A slope should be made in the threshold of the bathroom, painted high to prevent the water from flowing back into the outside room, and the threshold stone must be slightly plugged with fine cement mortar.

4.With elastic waterproof coatings:

After the completion and delivery of the new house, there will be more or less settlement, and after a long time, the hard plugging king elastic coating will be cracked alive due to settlement, thus losing the waterproof effect. Therefore, it is necessary to add a second insurance - elastic waterproofing coatings. Generally, the wall is made moisture-proof first, so that it is more than 1.8 meters.

Because people will splash water on the wall tiles when they take a bath, the gap between the tile molecules is large, and the water molecules can easily enter the wall and penetrate into the wall of the opposite room, resulting in the paint peeling off on the back of the bathroom and the moldy and discolored wallpaper. The wall is moisture-proof, and then the wall tiles are pasted, and then the ground decoration is waterproof.