Common construction errors during waterproofing construction may destroy the effect of the waterproofing layer. The following are some common construction errors and their damaging effects on the waterproof layer. If not paid attention to, the completed waterproofing construction may lose its waterproofing effect:
1. The base layer is not fully moistened:
Before applying waterproofing, if the base layer is in a dry state without being fully moistened, the gas on the surface of the base layer cannot be discharged after applying waterproof coating, resulting in holes in the waterproof coating film. In addition, when the base surface is not wet, the amount of waterproof coating will increase, and holes may appear after application. Therefore, it is necessary to moisten the base layer before construction fully.
2. There is open water at the grassroots level that has not been treated:
When wetting the base surface, apply a waterproof coating if there is open water. The open water will dilute the waterproof coating, causing the waterproof layer to be uneven and even white. In severe cases, the hardness and performance of the waterproof layer may also be affected. Therefore, before applying waterproofing materials, it is necessary to ensure no open water on the base layer.
3. Carry out a water-closing test before the waterproof layer is dry:
Conducting a closed water test when the waterproof layer is not completely dry and is still reacting may cause the undried surface coating film to be dissolved by water, and water will enter the interior of the coating film, causing the coating film to absorb water, swell, powder, and bubble. Therefore, it is necessary to ensure that the waterproof layer is completely dry before conducting the closed water test.
4. Apply repeatedly:
If the next layer of paint is applied before the waterproof layer is dry, the strength of the waterproof layer will be insufficient. In addition, coating too thickly will cause uneven local curing of the waterproof coating film, causing different shrinkage forces inside and outside, resulting in cracking of the waterproof layer. The correct method of painting is to apply the second coat after the first layer of waterproofing has dried, and the painting direction should be vertically staggered with the first coat. If necessary, you can apply the paint a third time, following the "brush thinly and multiple times" principle.
5. The inner corners and pipe openings are the parts where stress is concentrated in the building and are also important nodes for waterproofing. If arc treatment is not carried out in these parts, the waterproof layer will easily crack, causing leakage problems.
6. Unreasonable construction sequence:
The construction sequence is crucial to the waterproofing effect. If other construction processes, such as masonry and plastering, are carried out first before waterproofing construction, the base layer may be damaged or contaminated, affecting the bonding and adhesion of the waterproof layer. The correct approach is to give priority to waterproofing construction after the base layer is prepared to ensure the integrity and cleanliness of the base layer.
7. Ignore details:
Details in waterproofing construction are very important. Common details include the transition between waterproof layers and components, the sealing of waterproof coatings and pipes, etc. Ignoring these details can lead to weak points in the waterproofing layer and potential leaks. Therefore, attention should be paid to details during the construction process to ensure that every detail is properly resolved.
8. Use low-quality waterproof materials:
Choosing low-quality waterproof materials will not only affect the waterproofing effect but also shorten the life of the waterproof layer. Low-quality materials may have problems such as poor adhesion and poor anti-aging properties, which can easily lead to cracking, leakage, and other waterproof layer failures. Therefore, when choosing waterproof materials, you should choose products that are of reliable quality and comply with relevant standards.
9. Construction does not comply with specifications:
Waterproofing construction should comply with corresponding norms and standards. If the construction personnel lack professional knowledge or do not operate following the specifications, the construction quality may not be up to standard, thus affecting the waterproofing effect. Therefore, construction personnel should have relevant technical knowledge and experience and operate in accordance with specification requirements to ensure construction quality and waterproofing effect.
By avoiding the above erroneous construction and paying attention to the construction sequence, detail processing, material selection, and standardized operations, the quality and effect of waterproofing construction can be effectively improved and the waterproof performance of the building can meet the expected requirements.
