3.
What should I do? Stick it on the outside with tape? Under strong water pressure, it is estimated that if it can’t support for a second, it will continue to leak.
Although the back water surface waterproof is also anti-seepage, it can not protect the structure from water erosion, and even affect the grass-roots structure.
Backwater waterproofing is generally used only when there is no choice.
5.
Like the waterproof coiled material, it is not suitable for back water surface waterproofing, because the adhesion between the waterproof coiled material and the base layer is poor, and the waterproof performance is excellent when used on the upstream surface, but under the long-term back water pressure, the leakage will slowly push it open.
4.
For example, if the back water surface waterproof is adopted, the wall will be in a wet state for a long time, which will also affect its use function and structural firmness.
After 24 hours, it is recommended to use wet cloth to cover the coating or spray spray to maintain the coating.
2.
after the waterproof coating is cured-.
Foundation surface treatment is the key to the success or failure of waterproof.
▲ Yuguo light repair ▲ Shengyang rubber and plastic ▲ Sichuan Tongshen ▲ one world repair What is backwater waterproofing? Generally speaking, the side of the building structure contacting the water is the upstream surface, and vice versa.
For example, if the waterproof material of the upstream surface is simply used to waterproof the back surface, it will not play a good waterproof role.
We have to start from the outside of the water pipe.
Be careful when painting.
Good water resistance and durability.
Foundation surface treatment is the foundation.
Before construction, the foundation surface must be cleaned to ensure that it is firm, flat and clean without dust, grease, wax, release agent and other debris.
Or in the case of no leakage in the room, the leakage blocking and waterproof method shall be adopted.
For example, the side where the outer wall and bottom plate of the basement contact with the soil is the upstream surface, and the indoor side is the downstream surface; The wall in the bathroom is facing water, and the wall on one side of the living room or bedroom is back water; The roof of the building is facing water, and the indoor ceiling of the top floor household is back water.
Maintenance and protection are also important.
If there are defects such as pores and cracks, it must be repaired and leveled with cement-based polymer mortar in advance, Keep the base surface moist and free of open water.
So, what should be done for the waterproof construction of the back water surface? What should we pay attention to in the waterproof construction of back water surface? Due to the different positions and characteristics of the waterproof layer, the waterproof materials selected are different.
For example, if the upstairs leaks but refuses to redo waterproofing, we can only do backwater waterproofing on our own ceiling.
A variety of waterproof materials can be selected for the back surface, such as water-based coating material, cement-based permeable crystalline waterproof coating, polymer cement-based composite coating material, mortar mixed with waterproof agent and impermeable concrete.
The waterproof material on the back surface must generally meet the following requirements: 1.
The specific practice of back water surface waterproof should formulate specific construction scheme according to the on-site leakage, combine the characteristics of different materials, learn from each other, and cooperate with scientific construction technology, so as to achieve the good effect of long-term waterproof and impermeability.
Before stepping into the drying process, it is forbidden to tread, rain, sun and sharp injury.
Generally speaking, the waterproof of the back water surface is more difficult than that of the front water surface.
2.
Certain elongation.
Why? The later waterproof layer has different shrinkage ratio with the original concrete base.
High compressive strength.
High impermeability.
High adhesion.
Therefore, the general waterproof construction is from the upstream surface, that is, where the water comes from, start to do waterproof.
Especially in the later stage, we should pay special attention not to damage the waterproof layer.
3.
Under the long-term action of water pressure, the back water coating is easy to fall off and crack, resulting in waterproof failure.
At the same time, due to insufficient adhesion between the material and the base, it is difficult to form a dense whole.
4.
Check carefully after painting to prevent blistering, hollowing, folding, exposed tire, peeling, etc.
Precautions for waterproof construction of back water surface 1.
Therefore, the choice of waterproof on the back surface is generally made only when some objective conditions do not allow waterproof construction on the front surface.
The brushing method shall pay attention to the uniform force during brushing, and pay attention not to miss brushing; The angle of vertical intersection shall be maintained during the first and second brushing to fully cover in place; The single brushing shall not be too thick and shall not exceed the thickness specified in the product manual to prevent cracks after drying.
Carefully check the prevention of future problems.
For example, if the water pipe leaks, if we don’t replace the water pipe, we can’t reach into the water pipe to plug the leak.
