How to make the bathroom waterproof

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.

After choosing the waterproof material, follow the steps below:

The first step is to carefully chisel out a circular groove about 3 cm deep around the embedded pipe (such as the floor drain toilet drain pipe), and use flexible waterproof material to do the first waterproofing.

The second step is to lay the embedded pipes (such as various hot and cold water pipes to be laid under the floor tiles) and re-mortar leveling.

The third step is to do the second overall waterproofing after drying, the wall is not less than 30 cm, and the wall surface of the shower is not less than meters.

The fourth step is to make a waterproof protective layer after waterproofing and drying, and lay the floor tiles.

The selection of high-quality waterproof coating is a key to do a good job in waterproof decoration, taking the waterproof coating of Chenguang paint as an example, it is an organic liquid material made of water-based high-quality acrylic emulsion and various additives, and an inorganic powder prepared by special cement and a variety of fillers, and a two-component water-based waterproof slurry made of scientific proportioning.

Construction method. 1. Clean and clean the base layer.

2. Foundation leveling.

3. Treatment of pipe root parts and hydropower transformation parts.

4. Evenly stir the waterproof coating.

5. Brush 3 times.

6. Do a closed water test.

7. Check the waterproof effect after 24 hours.

The first step is to carefully chisel out a circular groove about 3 cm deep around the embedded pipe (such as the floor drain toilet drain pipe), and use flexible waterproof material to do the first waterproofing.

The second step is to lay the embedded pipes (such as various hot and cold water pipes to be laid under the floor tiles) and re-mortar leveling.

The third step is to do the second overall waterproofing after drying, the wall is not less than 30 cm, and the wall surface of the shower is not less than meters.

The fourth step is to make a waterproof protective layer after waterproofing and drying, and lay the floor tiles.

1. Bathroom waterproof construction steps.

Step 1: You can use a slightly coarser cement to base the foundation first, and then brush the waterproof paint after the cement is dry. But in painting money, the ground should be flat and there should be no grooves. Water is then sprinkled on the ground to expel the gas from the small holes.

Step 2: Mix the powder and liquid material evenly, and brush the bubbles if there are bubbles when brushing the paint.

Step 3: When brushing the paint, brush it from the same direction, wait 1-2 hours, and then brush the second coat. When brushing the second layer, the direction of the brush should be opposite to that of the first layer, so that the best coverage can be achieved.

Step 4: You can brush it several times, which can increase the density and fill the gaps. Some people think that the more layers of waterproof paint the better, or even brush six or seven layers, but in fact, this is not good, the paint is too thick and easy to crack.

Step 5: Wait for one day before taking a waterproof test.

Step 6: When doing the waterproof test, you should first fight with your downstairs neighbor.

Say hello, then plug the drain, fill the ground with water, and wait an hour to ask your downstairs neighbor if there is a leak. If there is a water leak, the waterproofing layer should be rebuilt. If the waterproof test is qualified, it can be tiled.

2. Precautions for waterproofing in the bathroom.

1. In order to ensure that the bathroom floor is flat, it must be leveled with cement mortar, and then waterproof, so as to avoid leakage caused by uneven thickness of waterproof coating.

2. After leveling, when carrying out the construction of the waterproof layer, it is necessary to pay attention to fire prevention and waterproofing.

3. When doing waterproof construction, the floor drain, pipeline, and wall hole should be carefully inspected, and the root of the pipeline must be caulked according to the requirements during construction. 4. The waterproof treatment of the wall should also be noted, if the wall and the bathtub are adjacent, then the waterproof treatment height should be higher than the upper edge of the bathtub, and the shower should reach a height of 180cm.

5. Before doing waterproofing, pay attention to the correct position of the floor drain elevation.

6. To ensure that the sewer is smooth, the sewer pipes in the bathroom, including floor drains and toilet sewer pipes, must be kept unobstructed.

1. Brush the waterproof paint for the first time. Before construction, ensure that the construction site is clean and dry, and the waterproof coating should be coated with no omission, firmly combined with the base layer, no cracks, no bubbles, and no falling off. The coating height is consistent, and the thickness should meet the requirements of the product.

><>2. Brush the waterproof paint for the second time. Note that there needs to be a certain time interval between the second waterproof coatings, and the second pass can only be carried out after the paint is dry, and the specific time depends on the coating. If the interval is too short, the waterproof effect will be greatly reduced.

3. Lay a protective layer. In order to prevent the subsequent construction from damaging the waterproof layer, it is necessary to lay a protective layer on the surface of the waterproof coating. The protective layer should be completely covered with the waterproof layer, no omission, firmly combined with the base layer, no cracks, no bubbles, and no falling off.

>4. Closed water test. During the closed water test, the waterline at the ground point should not be less than 2 cm, and it should be stored for at least 24 hours, and it should be qualified only after observing that there is no leakage. If there is a leak, it needs to be redone, and you must not be negligent.

>5. Grassroots treatment, cleaning, leveling layer, bonding layer, detail additional layer, acrylic waterproof layer, water storage test, protective layer construction, secondary water storage test.

1.Use cement mortar, cement mortar, or beanstone concrete to pave the slope. The trick is: the slope near the floor drain is large, and the slope near the doorway is small.

2.Use the root sealing paste to seal the pipeline, and the pipeline should penetrate the root of the floor slab. When brushing waterproof coating, you can paste 1-2 layers of glass silk cloth to strengthen the waterproofness.

3.The surface of the wall is polished to be clean and flat, without particles and dust, and the junction area between the wall and the ground pays attention to the setting of the original angle and slope angle.

4.The setting of the waterproofing layer depends on the specific area. The waterproof layer of the waterproof floor should be 200mm wide above the ground, and the waterproof layer of the ground should be 300mm wider than the bathroom door. The waterproof layer of the bathroom wall of the shower should be set to be 1800mm wide above the ground.

5.During the closed water test, the waterproofing work is completed first, and then the package riser method is used. After that, the waterproofing is carried out locally.

The main attention to the following points when doing waterproofing in the bathroom! 1. Pay attention to ground leveling before waterproofing; The ground is oriented to the slope of the floor drain, cement mortar or bean stone concrete can be used, but the surface should be flat. The slope near the door is small, and the slope near the floor drain is large, so you can grasp it according to the specific situation.

The ground is uneven, and it may be uneven when applying waterproof coating, or the ground is easy to crack because of unevenness, which will crack with the ground even if the waterproof paint is applied. 2. Strengthen waterproofing at the root of the pipeline; The pipeline passes through the root of the floor slab to strengthen the waterproofing. After the pipe root building sealing paste is sealed tightly, and the cement is smoothed and the foot pads are smoothed, the glass wire cloth reinforcement layer is 1 or 2 layers when brushing the waterproof coating.

The same measures are taken near the floor drain. 3. Waterproof wall treatment; The wall surface is clean and flat, without floating ash and small particles, and the original corner or slope angle is wiped at the junction of the wall and the ground. When brushing waterproof coating, paste 1 2 layers of glass wire cloth reinforcement.

4. Coating film thickness; The total thickness of the polyurethane waterproof coating film is required to be more than millimeters, which cannot be determined by the number of passes. The pipe root and the corner of the reinforcing layer are brushed first, and after the surface is dried at room temperature for 4h, then a large area is brushed and scraped, and there shall be no leakage and bubbling, and the next layer is painted after 24h curing after large-scale brushing. 5. brushing; The façade is painted first, then the plane, and the direction of the next painting is perpendicular to the previous one.

When the final coating film is semi-cured, the coarse sand particles are thrown to facilitate the combination with the cement mortar in the future. The waterproof layer on the ground should be painted 300 wide outside the bathroom door. The waterproof floor waterproof layer should be 200 meters higher than the ground, and the wall waterproof layer of the bathroom with shower should be 1800 meters higher than the ground (L8 recommends waterproofing the full wall).

The wall of the bathroom needs to be waterproofed, which is the standard of architectural decoration, which can not be ignored, and it will also affect your residence if you do not do waterproof for a long time, because there must be a room next door to your bathroom, and there is a simple decoration on the wall. If your hygiene has not been waterproofed for a long time, the water on the bathroom wall will easily corrode and affect your other rooms, so it is necessary to do waterproofing on the bathroom wall.

You can choose to use waterproof paint to do waterproofing, do it three times in the kitchen and bathroom, paint the floor fully, and the wall should be 30 cm above the ground. Generally, when the construction project is completed and the property is accepted, it has been waterproofed once, but if you are responsible for yourself, you still brush it three times, and do a closed water experiment after it is all dry, that is, fill the ground with water, and go downstairs to check whether there is water seepage after 48 hours, and you can hand over the work without water seepage. Asphalt waterproofing will have a great smell and pollution.

It depends on your own needs, I hope it will help you.