Make a bathroom on top of a prefabricated panel, how to do waterproofing

Toilet waterproofing practices:

1. Ground treatment.

Be sure to level the ground before applying waterproofing. Screed construction method: if there are voids, cracks and unequal defects on the base surface, repair and smooth with cement mortar.

The base surface must be firm, flat, clean, free of dust, greasy, wax, release agent, etc., and other debris substances. The construction of the waterproof layer can only be carried out after the screed is dry, and the construction should be fireproof and waterproof during the construction. After the waterproof layer is completed, the finished product should be protected, and no one should walk around.

2. Wall treatment.

About 300mm high waterproof paint should be used for wall treatment to prevent water from penetrating the wall and returning moisture.

The painting height between the wall and the floor (plane and façade) of the bathroom should be greater than 100mm.

If there is a shower in the bathroom, the waterproof height of the room is not less than 1800mm.

If there is a bathtub, the waterproof height of the wall adjacent to the bathtub should be 300mm higher than the bathtub.

The waterproof height of the bathtub is not less than 800mm.

The waterproof height of the squatting pit should exceed the ground of the squatting platform by 400mm.

For the light wall of the bathroom renovation and the self-built light wall, it is recommended that the waterproof height should be at the top.

3. Do a closed water test.

After the waterproofing construction is completed, the water storage test is carried out. Block all the drains in the bathroom, build a water barrier about 200mm high at the door, and then pour about 20mm 30mm deep water into the bathroom, and check whether there is leakage on the surrounding walls and the ground after 24 hours, the waterproof experiment is the key to ensure the quality of the bathroom waterproof project, and it must be done. If there is no leakage after more than 24 hours, it is considered qualified.

If water leakage is found, the water storage test should be stopped immediately, the waterproof layer should be re-improved, and the water storage test should be carried out after the treatment is qualified.

In practical application, it is often encountered that some ordinary rooms are changed to hotel rooms, and then the toilet is added, which needs to be treated carefully in terms of structure and waterproofing

1. First of all, adding a wall on the prefabricated slab is equivalent to adding a concentrated load on the slab, and it is recommended that the wall should be made of lightweight materials as much as possible, and the thickness should not exceed 120mm.

2. Waterproofing: The prefabricated board surface can be selected to be made of permeable leveling glue, and then made of polyurethane waterproof layer. Waterproofing materialsIt is recommended to choose waterproof coatings, do not use membranes, and do not use polymer waterproof layers.

3. After making the waterproof layer, test the water for 72 hours.

4. The drainage pipe and tap water pipe must be tested to be closed without seepage or leakage.

5. Choose lightweight materials for filling as much as possible, and protect the waterproof layer when filling.

6. The waterproof layer of the wall must be closely connected with the waterproof layer of the ground.

The method of waterproofing the bathroom on top of the prefabricated panel is as follows:

The waterproofing project of the bathroom is divided into ground waterproofing and wall waterproofing, it is not enough to do ground waterproofing, if the bathroom is sunken, then it needs to be backfilled or prefabricated board overhead leveling and then do waterproofing, at present, I received the project, I see that Party A will make the height of the bathroom waterproof to 1900 height, because the height of the shower is about 1900, so as to play the role of waterproofing. In some places, it is customary to only achieve a height of 300 in the non-shower area, and only in the shower area can achieve the height of 1900 in the sock letter. The construction method of waterproofing in the interior decoration brief rotation repair project is:

1. The base surface is required to be flat, clean, no sand and loose.

2. During construction, the base surface should be accepted first to ensure that it meets the requirements, and a layer of primer should be applied first, and the primer must be uniform.

3. After the primer is cured, the second brushing direction must be perpendicular to the previous one to prevent the leakage of the cover from scraping, and the brush should be painted three to five times in turn.

4. After completion, before the waterproof layer is cured (24 hours), no one shall go up to the person, and no process shall be carried out to avoid damaging the waterproof layer. At present, the most used is polyurethane waterproof coating, polyurethane waterproof coating is a liquid construction of one-component environmentally friendly waterproof coating, is based on imported polyurethane prepolymer as the basic ingredient, no tar and asphalt and other additives. It is the curing of moisture in the air after contact, forming a strong, tough, jointless integral waterproof membrane on the surface of the base layer.

The waterproofing project of the bathroom is divided into ground waterproofing and wall waterproofing, it is not enough to do ground waterproofing, if the bathroom is sunken, then it needs to be backfilled or prefabricated board overhead leveling and then do waterproofing, at present, I received the project, I see that Party A will make the height of the bathroom waterproof to 1900 height, because the height of the shower is about 1900, so as to play the role of waterproofing. In some places, it is customary to only achieve a height of 300 for non-shower areas, and 1900 for shower areas. The construction method of waterproofing in interior decoration works is:

1. The base surface is required to be flat, clean, no sand and loose.

2. During construction, the base surface should be accepted first to ensure that it meets the requirements, and a layer of primer should be applied first, and the primer must be uniform.

3. After the primer is cured, the second brushing direction must be perpendicular to the previous one to prevent leakage and scraping, and the brushing should be carried out three to five times in turn.

4. After completion, before the waterproof layer is cured (24 hours), no one shall go up to the person, and no process shall be carried out to avoid damaging the waterproof layer. At present, the most used is polyurethane waterproof coating, polyurethane waterproof coating is a liquid construction of one-component environmentally friendly waterproof coating, is based on imported polyurethane prepolymer as the basic ingredient, no tar and asphalt and other additives. It is the curing of moisture in the air after contact, forming a strong, tough, jointless integral waterproof membrane on the surface of the base layer.