What are the problems to be paid attention to in the process of waterproof construction?

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.

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. 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. The brands with better quality include Yilaide, Leibangshi, and Degao.

There is also the construction to be in place, the bathroom is the main waterproof place, brush the waterproof paint generally the wall to the high, there is a shower there there to be a wall to be high or to the top of the wall; Finally, it is necessary to do a good job of water test and later waterproof layer protection.

The front point is the surface cleaning of the waterproof project, and the surface of the debris, oil, stones, etc., must be cleaned at any time in the construction process. The second point is the strength of the base layer, in order to ensure that the coating film is firmly adhered to the surface of the base layer. The screed is required to have sufficient strength.

The third point is that there should be no reinforcement in the waterproof project, if the tie rod bolt of the waterproof base surface is protruded, it should be cut, and the broken end of the cut rod bolt should be leveled with cement. The fourth point is that it is solid, and the concrete or cement of the waterproof base surface can only be waterproofed after reaching a certain strength. Four or five points is to check the moisture content, moisture content is an important factor affecting the quality of the coating film, if the water content is too high, it will affect the bonding of Ningbo waterproof material is not firm, if it is too low, it will cause the cement coating film to dehydrate in the coagulation process, which will lead to the pulverization of the material, so it is necessary to check the moisture content of the base layer before construction.

Carefully sweep the base surface to remove floating dust, and remove cement agglomeration and loose base layer; Special treatment is carried out on pipe roots, drainage holes, yin and yang corners, and cavities left by wall water and electricity reform. After the treatment is completed, use a brush to sweep the dust left on the base surface, take an appropriate amount of waterproof paint to dilute it to milk-like, dip the diluted material with a roller to the bottom to the top, and paint the waterproof surface first and then the ground to achieve thorough dust removal. In addition to the bathroom that must be waterproofed, some families also introduce waterways into balconies, basements, etc. when decorating, and families with floor heating need to lay pipes on the ground of the entire room to remove water, so it is necessary to do waterproofing in these places that are prone to flooding.

For the buried water pipe in the wall, the groove larger than the pipe diameter should be chiseled, the groove should be plastered, and the waterproof coating should be brushed. If the original drainage and sewage pipes and floor drain locations are changed during the renovation, waterproofing measures must be strengthened around the perimeter. <>

Problems that should be paid attention to in waterproof construction.

1. If the waterproof level of the roofing project is not clear and the fortification requirements are not clear, the waterproof engineering design will be carried out;

2. There is no detailed structural design details for important parts such as roof structure nodes;

3. Before the construction of the waterproof project, the design drawings were not reviewed;

4. Before the roof waterproofing construction, the construction unit has not prepared the construction plan or technical measures of the roofing project;

5. The waterproof project is constructed by a non-waterproof professional team, and the operator has no work certificate;

6. In the process of roof waterproofing construction, there is no "three inspections" system of self-inspection, mutual inspection and full-time personnel inspection of each process;

7. After the waterproof material enters the construction site, the sampling re-inspection is not carried out;

8. In order to rush the construction period, the roof waterproof layer is constructed in rainy, snowy, five-level wind and above weather;

9. During the construction of the roof waterproof layer, the ambient temperature conditions do not meet the requirements;

10. The construction of the roof waterproof layer is not constructed in the order of "high first and then low" and "first far and then near";

11. After the waterproof layer is completed, the finished product is not well protected;

12. After the completion of the roof waterproof layer, no water spraying or water storage test is carried out on the detailed structure, joints and roofs;

13. After the roof waterproofing project is delivered, the property is not managed, maintained and maintained;

14. The construction quality of each sub-project of the roofing project is not inspected according to the batch regulations.

14 fourteen waterproof problems that should be paid attention to in waterproof construction.

1. The waterproof grade of the roofing project is not clear, and the fortification requirements are not clear, so the waterproof engineering design 2, the roof structure node and other important parts are not detailed, and there is no detailed structure design detail 3, and the design drawings are not reviewed before the construction of the waterproof project.

4. Before the roof waterproofing construction, the construction unit did not prepare the roofing engineering construction plan or technical measures 5. The waterproof project is constructed by a non-waterproof professional team, and the operator has no work certificate 6. During the roof waterproofing construction process, there is no "three inspections" system of self-inspection, mutual inspection and full-time personnel inspection of each process.

7. After the waterproof material enters the construction site, the sampling re-inspection is not carried out 8. In order to rush the construction period, the roof waterproof layer is constructed in rainy, snowy, five-level wind and above 9, and the ambient temperature conditions do not meet the requirements when the roof waterproof layer is constructed 10. The construction of the roof waterproof layer is not constructed in the order of "first high and then low" and "first far and then near" 11. After the completion of the waterproof layer, the finished product is not well protected.

12. After the completion of the roof waterproof layer, the detailed structure, joints and roofs are not sprayed or stored in the water test13, after the roof waterproofing project is delivered, the property is not managed, maintained and maintained14, and the construction quality of each sub-project of the roofing project is not inspected according to the batch regulations.

To be the main, first of all, the base layer should be sure to be firm and dry during construction. The second is to mainly carry out the construction of some relatively hidden places such as water and floor drains, and then it is necessary to brush several times, at least no less than 2 times. After the waterproof layer is dry, do a 48-hour closed water experiment.

Before construction, it is necessary to check whether there is a leakage, if there is, first do the leakage, the construction methods are similar, the key parts such as the yin and yang corners, floor drains and other parts should focus on special treatment (in the surrounding chisel groove, clean and dry the water, put the water stop tight, fill with plugging mortar), in fact, it is to pay attention to the coil when paving, it must be paved flat, from one end to the other end can not bubble, the lap part must be overlapped and compacted, and the order of laying the coil should be paved from low to high.

Prevention-oriented, anti-blockage combination, adaptation to local conditions, rigid and flexible combination, multi-layer fortification.

In the construction of building waterproofing, safety is the first place, and operation is the foundation, so what aspects should be paid attention to?

First, grassroots treatment:

1. The base layer should be smooth, firm, clean and clean, without floating ash, stains, etc., in line with the design requirements and acceptance specifications.

2. When the groundwater level is high, the bottom of the pool and the outside of the pool wall should be made a blind ditch type water filter.

Second, the construction of the waterproof layer:

1. After the base treatment meets the requirements, the polymer cement slurry with a thickness of about 1 is scraped and coated on the leveling layer as the interface layer, and the water-cement ratio = 1 (weight ratio).

2. Before the initial setting of the bottom coat, you can scrape and coat a piece of cement as a waterproof layer, with a thickness of about 2 3mm, and the water-cement ratio is: 1 (weight ratio), and the construction of the second waterproof layer can only be carried out after the final setting of the first waterproof layer.

3. The direction of the second waterproof layer should be perpendicular to the first one, the thickness is about 2 3mm, and the water-cement ratio is: 1 (weight ratio) The second waterproof is directly tiled, which is more cost-effective.

4. The construction of the waterproof layer should be the bottom of the pool behind the wall, and the yin corner should be made into an arc shape, requiring the bottom of the pool to be scraped along the wall at one time, without leaving joints, and not missing coatings, if the joints must be left, they should be left on the wall at a height of about 300 500mm, and higher than the original concrete construction joints, and the waterproof layer at the bottom of the pool and the waterproof layer of the pool wall should intersect.

5. If it is a pool on the ground, scrape and apply a piece of cement on the front surface and the back surface as a waterproof layer.

6. After the construction of the waterproof layer and facing bricks is completed, it needs to be cured at room temperature for 5-7 days, and no water shall be stored during the curing period.

Precautions. 1. The mortar should be prepared by a special person, and the electric mixer should be used for stirring, and there should be no corn flour ball. Before construction, the base layer can be wet, but there must be no open water.

2. The mixed mortar needs to be left for 5-10 minutes before use.

3. The containers and tools used should be kept clean and clean.

4. It is best to use it with mixing, and the mixed cement should be used up within 6 hours to avoid waste caused by hardening and agglomeration.

5. After the waterproof layer is scraped, if the climate is too dry and the coating surface is whitish, you can use a shower to gently sprinkle water for maintenance.

Precautions for building waterproof construction:

1. Base surface treatment

1. The base surface should be clean and free of cement slurry, oil and other sundries, and the concrete base surface should be cleaned so that the waterproof coating can be closely bonded, which is conducive to the penetration of the coating and the formation of crystals, and exerts the effect of secondary impermeability.

2. Check whether there are structural defects, the honeycomb, holes, cracks and the periphery of the upper and lower water pipes on the base surface should be filled and smoothed with the slurry blended with plugging materials, and the sharp edges and protrusions should be removed.

3. Before construction, thoroughly wet the working surface with clean water to form internal saturation, so as to facilitate the penetration of cement-based permeable crystalline waterproof coating into the concrete structure with the help of water. However, in order to maintain the five clear water on the base surface, a wet section should be done for winter construction.

2. Partial brushing

1. First carry out local painting in the order from top to bottom and from left to right.

2. It is necessary to ensure that the coating thickness is the recommended amount for construction, otherwise the slurry is too thin or unevenly stirred, and it is easy to powder or shell.

3. An electric mixer can be used to fully stir until a homogeneous slurry without powder is formed, and then stir again after standing for 10 minutes to make the slurry fully matured. The stirrer should be placed at the bottom of the container during the second stirring, and the lifting movement should not be done to avoid the slurry being wrapped in air, and the adjusted slurry should be used up as soon as possible.

3. Large-scale construction

2. It is recommended to use glass fiber mesh cloth for reinforcement treatment at the interface of the upper and lower water pipes of the large gaps and easily deformed cracks, and the high-pressure spraying method can also be used for construction.

3. When the coating is solidified to the point that it will not be damaged by spraying water, it should be sprayed with water 1 3 times a day in winter (not freezing), or covered with damp and breathable burlap and straw mat for two days. The maintenance work lasts 1 to 2 days.

1. Whether the base layer is cleaned up.

2. Whether the materials used meet the design requirements (the materials meet the requirements and be sent to the testing center for re-inspection) 3. Check the length and direction of the lap during construction, and the bonding between the material and the base layer (because I don't know which position you do for waterproofing, the above is universal).