Detailed explanation of hidden works and their precautions

>>>Links: Large-scale disclosure of hidden projects - the most vulnerable to leaking corners

Concealed works refer to projects that need to be covered or covered by foundations, electrical pipelines, and water supply and heating pipelines. Since concealed projects are concealed, if quality problems occur, they must be re-covered and covered up. This can result in very large losses such as rework. To avoid waste of resources and loss of both parties, ensure the quality of the project and the successful completion of the project. Before the covert project is concealed, the contractor shall be notified of the inspection, and if the contractor has passed the inspection, the concealed project may be carried out. In practice, when the project has coverage or cover-up conditions, the contractor shall conduct self-inspection first. After passing the inspection, the contractor shall promptly inform the contractor or the site representative of the contractor to inspect the conditions of the concealed project before the concealment works are concealed. Participate in covert work. The notice includes the contractor's self-check record, hidden content, inspection time and location. After receiving the notice, the Employer or its site representative shall arrive at the concealed site within the required time to inspect the conditions of the concealed project. If the inspection is qualified, the Employer or the representative of the site where he is assigned shall sign on the inspection record and contract. After people pass the inspection, concealed construction can be carried out. If the contractor checks and finds that the concealed project conditions are unqualified, he has the right to request the contractor to improve the project conditions within a certain period of time. If the concealed project conditions meet the requirements of the code and the Employer has passed the inspection, the Employer or his representative on the site of the construction site refuses to sign the inspection record after the inspection. In practice, the Employer may deem that the Employer has already approved it and the Contractor may carry out hidden construction work.
After receiving the notice, the contract-issuing party fails to check the concealed project conditions as scheduled, and the contractor shall urge the contract-issuing party to carry out the inspection within a reasonable time limit. Because the contractor does not carry out the inspection, the contractor cannot carry out concealed construction. Therefore, if the contractor notifies the contractor of the inspection and the contractor fails to perform the inspection in time, the contractor has the right to suspend the construction. The contractor may extend the duration of the contract and require the contractor to compensate for the resulting loss of work stoppages, workmanship, backlogs of materials and components.
If the contractor does not notify the contractor to conduct concealment work on his own, the contractor shall have the right to require the inspection of the concealed project. The contractor shall perform the demolition as required and shall conceal it after the inspection or conceal it after repair. If the inspection concealed project does not meet the requirements, the contractor shall rework and re-conceal. In this case, the expenses incurred for the inspection of concealed works, such as inspection fees, rework costs, and material costs, shall be borne by the contractor, and the contractor shall also bear the responsibility for breach of contract due to delays in the construction period.
The term “hidden project” is mainly used in the decoration industry. The most important content contained in the hidden project is the water supply and drainage project, wire and cable engineering, as well as the floor base and partition base, among which the hydropower project is particularly important. Because the hidden works of hydropower are related to safety, it is particularly necessary to pay attention to and supervise hidden works during the renovation process!

The following points need attention:
1. Wires and wires are mainly divided into several types: lighting lines, outlet lines, and air conditioning lines. In principle, the quality of electric wires is now available in newly built houses, so it is generally not necessary to re-arrange them unless you know that your home's wires are not working or that you are not worried about money. Therefore, as long as the wire part is increased and extended as needed, it is sufficient.
In general, a single core wire of 1.5 square wires is used for lighting; a single core wire of 2.5 square wires is used for sockets; a single core wire of 4 square wires is used for more than 3 air conditioners; a single core wire of 6 square wires is used for total progress. Line, two-color line for grounding. The new houses in the air-conditioning line are all in good order. Therefore, under normal circumstances, air-conditioning lines do not need to increase. The wire is recommended for pandas. In addition, Yuba's wires also use a socket cable, which is 2.5 square meters, with 4 squares of the best.
2. The wooden keel must be made of wood keel when it is used as a heating cabinet, suspended ceiling, and under-floor solid wood flooring. The key to the use of wood keels is the use of inferior wood. In addition, for fire protection needs, wood keel should be brushed 1 to 2 times of fire-retardant paint, the general decoration for the sake of saving money or maps, often ignore this.
3. PVC pipe PVC pipe protection of the two main reasons: First, because of protection and insulation; and another important reason is to ensure future maintenance. Just think about it. When the concealed projects are all done, one day, if a wire is out of order, it can be pulled out through a PVC pipe and replaced with a good one. If you wear too many wires in the PVC pipe, you will not be able to pull it, and there will be no future repairs. In addition, PVC pipe joints must be used when docking, and glue should be used to secure the joints. In addition, the connection between the PVC pipe and the wire box must use a dedicated cover, do not directly use PVC pipe and wire box docking.
The normal operation specification is to first arrange the PVC pipe and connect the pipe after all the pipes are connected. Unfortunately, most of the workers nowadays do not regulate their operations, that is, they are connected to the pipes while wearing wires. Oh, it is really difficult to ensure that the wires can be replaced smoothly.
4. Floor waterproofing If the original ground is damaged during construction, the original waterproof layer is likely to be damaged. "Hardwater incursions" bring inconvenience and loss to both themselves and others. Floor waterproofing is necessary and cannot be ignored. Currently used waterproof materials are: Polyurethane film; Water does not leak; plugging Ling; After the stop water treatment, the provisions of the water storage experiment should be to see whether the phenomenon of leakage within 24 hours.
5. Do not close the pipeline Some decoration process will completely close the exposed pipe in the room, and it will be fixed to a dead end, such as doing wrapping, fixed heating cover and so on. This is very harmful. In addition to seemingly neat appearance, there are no other benefits. The heating pipeline has a certain service life, certainly need to be repaired and replaced. It is a pity that the fixed decoration will be demolished at that time, and it will not affect the maintenance and full house running.
6. The collapse of the ceiling as a whole or in part causes the ceiling to become a "top drop."
This is mainly due to the poor combination of ceilings and floor slabs, keel and veneer, or excessive weight bearing. According to the regulations, the ceiling keel shall not be twisted or deformed. The installed keel shall be firm and reliable. The chandelier or ceiling fan whose surrounding horizontal deviation shall not exceed 5 mm and exceeds 3 kg in weight shall not be hung on the ceiling keel. Instead, a separate hook shall be provided. If the ceiling is made of gypsum board, the thickness should be about 9mm.
7. The failure to secure the balcony in the fixed package caused the collapse of the package. Due to the current design of the house, there is no “foothold” for the packaging material on the balcony, which makes it difficult for the balcony to be packaged. When packaging the balconies, the doors and windows must be horizontally and vertically aligned with the same height and appearance. There should be no distortion, open welding, or fracture in the appearance. The gap between the frame and the wall should be full and dense.
8. Pipe Leakage Causes Damage to the Ceiling In addition to the upper and lower water pipes in the kitchen and toilet in the family room, the heating pipes in each room are actually more prone to problems. Because the installation of pipelines is not easy to check, after all the pipeline construction is completed, it must be checked by water injection and pressure, and no run, run, drip, or leak will be considered.
9. Dangerous situation of buried burial lines for buried burial lines Because many residential buildings currently use buried burial lines, it is not easy for the household head to check the construction quality. According to regulations, buried lines cannot be buried directly in the plastering layer but must be sheathed outside the wires. Wires in the bushing must not be twisted or jointed. In addition, when installing the line, we must strictly abide by the "fire line into the switch, the zero line into the lamp left and right fire, grounding on the" provisions. After the completion of the construction, in addition to the power inspection, the construction team will also provide the owner with a detailed circuit configuration plan.
10. The substrate is not cleaned before painting, causing the paint to peel off and falling off. Before the wall is painted, it is necessary to remove the original wall covering and not leave any oil. The putty on the wall should be dense and firm with the wall, without peeling, without chalking and cracking.

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