Toilet waterproof construction, closed water verification and finished product protection closed loop control method

Abstract

The present application relates to the field of building decoration waterproof construction technology, and discloses a bathroom waterproof construction, closed water verification and finished product protection closed loop control method, comprising the following specific steps: cleaning, leveling and drying treatment of the bathroom base layer to form a base layer surface suitable for waterproof coating adhesion; additional reinforcement is made on high-risk nodes such as doorways, inside and outside corners, pipe roots, floor drains and water supply points, and an extended waterproof area and an end visual humidity detection point are formed outside the doorway. Then, waterproof coating is applied in multiple passes, and at least one pass is identified for surface defects and repaired for re-inspection. After film formation, the first finished product protection state is switched and the first closed water test is performed, and the water level is observed or blocked for detection outside the doorway simultaneously; if qualified and no water leakage occurs, controlled construction of the protection layer is allowed, otherwise, the position is repaired and re-inspected. The second finished product protection state is switched during and after the construction of the protection layer, and the second closed water test is performed; after passing, the tiling or decoration process is handed over, and if unqualified, the protection layer is repaired and re-inspected. The present application solves the problems of bathroom waterproof node leakage, closed water and finished product protection disconnection, and subsequent construction damage to the waterproof layer.

Description

Technical Field

[0001] This invention relates to the field of building decoration waterproofing construction technology, specifically to a closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection. Background Technology

[0002] With the development of high-end residential decoration and prefabricated construction projects, bathrooms, as spaces constantly exposed to moisture, water, and alternating hot and cold environments, are particularly vulnerable to water damage. The quality of waterproofing in bathrooms directly impacts building functionality and future maintenance costs. Bathroom leaks typically occur at doorways, pipe roots, floor drains, corners, water supply points, and wall-floor junctions. These areas are vulnerable due to structural corners, material junctions, and pipe penetrations. They are also susceptible to damage from foot traffic, impacts, or contamination during subsequent protective layer construction, tiling, and other overlapping work. Therefore, simply applying ordinary large-area waterproofing coatings is insufficient to reliably guarantee waterproofing effectiveness.

[0003] Current bathroom waterproofing construction typically involves multiple coats of JS waterproof coating or cement-based waterproof coating. After cleaning the substrate, treating corners, sealing pipe roots, and treating the area around the drain, a waterproof membrane is formed. A water tightness test is then conducted after the waterproof layer is completed. Once the test is passed, subsequent processes such as applying a protective layer, leveling layer, or laying finishing tiles are carried out. In some projects, additional waterproof layers are installed at pipe roots, drains, and corners, and certain protective measures are taken for the finished product after construction.

[0004] The prior art discloses a Chinese invention patent application (application number 2020114523645) regarding a waterproof structure for a bathroom recess and its construction method. The invention includes a recess structure and a waterproof structural layer. The recess structure comprises a recess bottom plate and a recess facade, with a protective layer for the recess structure laid on both the bottom plate and the facade. The waterproof structural layer is laid on the surface of the protective layer and includes a base treatment agent layer, a waterproof putty layer, a JS-Ⅱ type polymer cement-based waterproof coating layer, and a waterproof coating protective layer.

[0005] However, the existing technologies still have the following problems: First, traditional waterproofing construction often focuses on whether the waterproofing coating has been applied completely, while lacking systematic pre-construction reinforcement control for high-risk nodes such as doorways, pipe roots, floor drains, and internal and external corners, which can easily lead to local weak points; Second, after the waterproofing layer passes the water tightness test, the construction of the protective layer, tiling, and other cross-operations may still cause damage to the waterproofing layer due to trampling, puncture, hollowing, or contamination; Third, traditional water tightness tests are mostly used as a final acceptance method and cannot effectively constrain the construction of the protective layer and the initiation of subsequent processes; Fourth, defects such as bubbles, pinholes, particles, missed areas, and peeling generated during the waterproofing coating construction process usually rely on manual experience for discovery, lacking a mechanism for identification, repair, and re-inspection; Fifth, finished product protection relies heavily on on-site management requirements and lacks a mandatory triggering logic linked to the water tightness test results, which means that even if the waterproofing layer passes the water tightness test, it may still be damaged again during subsequent construction, ultimately leading to leakage and rework. Summary of the Invention

[0006] Based on the above description, the present invention provides a closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection, in order to solve the problems of easy leakage at bathroom waterproofing nodes, disconnect between water tightness verification and finished product protection, and easy damage to the waterproofing layer during subsequent construction.

[0007] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection, comprising the following steps:

[0008] S1. Treat the bathroom substrate to form a substrate that meets the requirements for waterproof coating adhesion;

[0009] S2. Perform additional reinforcement treatment on all high-risk nodes in the bathroom. High-risk nodes include, but are not limited to, doorways, corners, pipe roots, floor drains, and water supply points. Form an extended waterproof zone at the doorway that extends outwards from the bathroom. Set up a visual humidity detection point at the end of the extended waterproof zone.

[0010] S3. Apply multiple coats of waterproof coating to the base layer and the high-risk node areas after additional reinforcement treatment.

[0011] S4. After at least one coat of waterproof coating is applied, identify defects on the coating surface, repair defective areas, and re-inspect.

[0012] S5. After the waterproof coating has formed, switch the bathroom doorway and the waterproof construction area to the first finished product protection state, and conduct the first water tightness test in the first finished product protection state.

[0013] S6. During the first water tightness test, an observation point or water-blocking detection point is set on the outside of the waterproof area extending from the doorway. The observation point or water-blocking detection point is used to determine whether there is horizontal water flow in the waterproof area extending from the doorway.

[0014] S7. Determine whether protective layer construction is permitted based on the results of the initial water tightness test and the test results of the observation point or water-blocking detection point; when the initial water tightness test is qualified and no horizontal water flow at the doorway is detected, switch the first finished product protection state to the protective layer construction permission state, and allow the protective layer construction under controlled protection conditions; when the initial water tightness test is unqualified or horizontal water flow at the doorway is detected, maintain or restore the first finished product protection state, locate the leakage area, defect area or water flow area, and return to execute the defect repair and re-inspection steps;

[0015] S8. During and after the construction of the protective layer, switch the bathroom doorway and the area under the protective layer to the second finished product protection state.

[0016] S9. Conduct a second water tightness test under the second finished product protection state;

[0017] S10. Determine whether to allow the handover of subsequent tiling or decoration construction procedures based on the results of the secondary water tightness test; when the secondary water tightness test is qualified, release or adjust the second finished product protection status and hand over to the subsequent procedures; when the secondary water tightness test is unqualified, maintain the second finished product protection status and return to the defect repair, protective layer restoration and secondary water tightness retest steps.

[0018] The aforementioned technical solution incorporates the following steps into a closed-loop process: substrate treatment, joint reinforcement, waterproof coating application, defect identification and repair, initial water tightness test, assessment of horizontal water seepage at doorways, permitting the protective layer application, secondary water tightness test, and handover of subsequent procedures. This avoids the problems of "completion and handover immediately" and the disconnect between water tightness test and protection in traditional construction. This method ensures that waterproofing quality acceptance no longer relies solely on a single water tightness test result. Instead, it uses a coordinated approach of pre-construction control, in-construction inspection, post-construction verification, and finished product protection to promptly identify and address risks of leakage, water seepage, and human-caused damage, thereby improving the reliability and traceability of bathroom waterproofing construction.

[0019] Based on the above technical solution, the present invention can be further improved as follows.

[0020] Furthermore, the visualized humidity detection point includes a water guide channel set at the end of the outer waterproof area of ​​the doorway, a capillary guide layer laid in the water guide channel, and a water-sensitive color-changing detection layer.

[0021] The water-sensitive color-changing detection layer is a humidity detection card, which is laid on the capillary guide layer, and the water guide trough is covered with a sealing cover made of transparent acrylic sheet.

[0022] The above technical solution, by setting a visual humidity detection point at the end of the outer waterproof zone at the doorway, can transform the difficult-to-detect horizontal water seepage phenomenon at the doorway into a visually observable change in color or humidity. This structure avoids the lag and misjudgment caused by relying solely on visual observation of whether there is water seepage on the outside of the threshold, improves the early identification capability of weak points in the doorway waterproofing, and facilitates construction personnel to promptly determine whether the outer waterproof zone has failed during the water tightness period.

[0023] Furthermore, S1 includes:

[0024] Remove laitance, dust, oil, and loose layers from the base surface;

[0025] Seal and repair cracks, holes, and pipeline crossings in the base layer;

[0026] Leveling and sloping the ground is required;

[0027] The inside and outside corners are treated as rounded transition structures;

[0028] This ensures that the base surface is firm, flat, free of standing water, and free of sand.

[0029] The above-mentioned technical solution, through cleaning, repairing, leveling, and rounding the corners of the substrate, can improve the adhesion stability between the waterproof coating and the substrate, and reduce problems such as hollowing, peeling, and detachment caused by laitance, dust, oil, holes, sand, or standing water. By treating the inside and outside corners as rounded transition structures, the waterproof coating can spread continuously at the corners, reducing stress concentration and uneven coating thickness at right angles, thus improving the film-forming quality and durability of subsequent waterproof layers from the source.

[0030] Furthermore, the additional enhancements to the doorway include:

[0031] An extended waterproof zone is formed at the bathroom doorway, extending outwards from the bathroom entrance;

[0032] A laterally extended waterproof zone is formed on both sides of the entrance;

[0033] A water-stopping sill, a waterproof mortar layer, a sealing layer, and a wet-laid threshold stone layer are sequentially installed at the entrance to form a water-proof structure.

[0034] The aforementioned technical solution, by creating an extended waterproof zone and a lateral extended waterproof zone at the bathroom doorway, and combining a water-stopping curb, waterproof mortar layer, sealing layer, and wet-laid threshold stone layer to form a water-proofing structure, effectively addresses the problem of water spreading horizontally outwards along the ground or under the threshold at the bathroom doorway. This structure not only enhances the frontal waterproofing capability of the doorway but also covers the easily overlooked lateral seepage paths on both sides of the doorway, transforming the doorway area from a single waterproof line into a multi-layered composite water-blocking system, thereby improving the seepage resistance and water-proofing capability of the threshold area.

[0035] Furthermore, the extended waterproof area extends 300mm to 800mm outward from the outside of the bathroom;

[0036] The lateral waterproof zone extends 100mm to 300mm along both sides of the doorway;

[0037] The height of the water-stopping sill is 10mm to 50mm.

[0038] The above technical solution provides clear construction boundaries and dimensional control standards for the doorway waterproofing structure. These parameters ensure that the extended and lateral waterproofing range is sufficient to cover common water seepage paths, while avoiding excessive extension that could lead to material waste or interference with adjacent ground construction. This improves the standardization, replicability, and ease of on-site acceptance of the doorway waterproofing structure.

[0039] Furthermore, the additional enhancement processing for the high-risk nodes includes:

[0040] A rounded transition layer, a first additional waterproof layer, a tire body reinforcement layer, and a second covering waterproof layer are installed at the internal and external corners;

[0041] An annular groove, a sealing filling layer, a flexible wrapping layer, and a waterproof covering layer are installed at the pipe root.

[0042] A grooved sealing layer, a sloping water collection layer, and an additional waterproof layer are installed around the floor drain;

[0043] A sealing layer and a surrounding additional waterproof layer are installed around the water supply points.

[0044] The above-mentioned technical solution, by setting differentiated additional reinforcement structures for internal and external corners, pipe roots, floor drains, and water supply points, can provide targeted protection for the most leak-prone areas in the bathroom. The rounded transition layer, reinforcing layer, and multiple waterproof layers at the internal and external corners can reduce the risk of cracking; the annular groove, sealing filling layer, and flexible covering layer at the pipe roots can adapt to slight pipe deformation; the sloping water collection layer and additional waterproof layer around the floor drain can reduce water retention; and the sealing layer and surrounding additional layer at the water supply points can improve the seepage resistance at wall penetration points.

[0045] Furthermore, the waterproof coating is a JS waterproof coating or a cement-based waterproof coating;

[0046] The waterproof coating is applied in 2 to 4 coats.

[0047] The next coat of waterproofing coating should be applied after the previous coat has reached a surface-dry or fully-dry state.

[0048] The dry film thickness of the waterproof coating on the ground is 1.2mm to 2.0mm;

[0049] The dry film thickness of the waterproof coating on the wall is 1.0mm to 1.8mm.

[0050] The above technical solution, by limiting the type of waterproof coating, the number of coats, the application status of each coat, and the dry film thickness range on the ground and walls, ensures that the waterproof layer forms a continuous, uniform coating system that meets the usage requirements. Multiple coats reduce cracking, bubbling, and insufficient drying problems that can occur with a single thick coat; applying the next coat only after the previous coat is surface dry or fully dry promotes stable interlayer bonding; limiting the dry film thickness for both walls and the ground balances the ground's resistance to water accumulation and the wall's adhesion stability, reducing the risk of leakage caused by a thin coating.

[0051] Furthermore, S4 includes:

[0052] The defects include, but are not limited to, bubble defects, pinhole defects, particle defects, missed brushing areas, peeling or hollow areas.

[0053] The bubble defects are cut open, vented, dried, and repaired.

[0054] Local sealing and repair of pinhole defects;

[0055] Grinding, cleaning, and brushing are performed to remove particle defects;

[0056] Touch up any missed areas;

[0057] After removing the peeling or hollow areas, reapply the waterproof coating.

[0058] This will allow the repaired area to overlap with the original waterproof coating.

[0059] The above-mentioned technical solution, by classifying and identifying defects such as bubbles, pinholes, particles, missed areas, peeling, or hollow areas after the waterproof coating is applied, and then taking appropriate measures such as cutting to vent air, local sealing, grinding and cleaning, recoating, or cutting and redoing for different defects, can avoid directly introducing a defective waterproof layer into the water tightness and protective layer construction stage. This step transforms defect treatment from general repair to classified treatment, which can improve the targeted nature of repairs, reduce the probability of repeated leakage in the same area, and ensure a continuous overlap between the repaired area and the original waterproof layer.

[0060] Furthermore, the overlap width between the repaired area and the original waterproof coating is 50mm to 150mm;

[0061] The thickness of the repaired dry film should not be less than 80% of the thickness of the adjacent qualified waterproof coating.

[0062] After the repair is completed, a visual inspection or thickness test should be performed again.

[0063] The above technical solution, by limiting the overlap width between the repair area and the original waterproof coating to 50mm to 150mm and requiring that the local dry film thickness after repair be no less than 80% of the thickness of the adjacent qualified coating, can prevent the formation of new weak boundaries at the repair site. Re-inspection or thickness testing allows for secondary confirmation of the repair results, preventing reliance on experience to determine repair quality. The effect of this technology is to provide quantifiable acceptance criteria for defect repairs, improving the continuity, reliability, and traceability between the repaired area and the original waterproof layer.

[0064] Furthermore, the first and second finished product protection states include setting up a detachable doorway barrier and an entrance / exit closure sign at the bathroom entrance, setting up a restricted work passage area in the waterproofing construction area, and setting up a non-contact support pad for the waterproofing layer, an anti-stepping cover plate, and edge limiting components for the cover plate within the restricted work passage area.

[0065] The anti-trampling cover is installed above the waterproof construction area via a non-contact support pad of the waterproof layer.

[0066] The above technical solution, by setting up a detachable barrier at the entrance, closed signs, a restricted work passage, non-contact support pads for the waterproof layer, anti-trampling cover plates, and edge limiting components in both the first and second finished product protection states, can prevent damage to the waterproof layer caused by personnel trampling, material stacking, or cover plate displacement. The anti-trampling cover plate is installed above the waterproof construction area through non-contact support pads, creating a gap between the cover plate and the waterproof layer, preventing the uncured or already formed waterproof layer from being stuck, crushed, scratched, or locally thinned, thus improving the finished product protection effect.

[0067] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0068] 1. By incorporating base treatment, reinforcement of high-risk nodes, waterproof coating application, defect identification and repair, two water tightness tests, and switching of finished product protection status into a unified closed-loop control process, the bathroom waterproofing construction has been transformed from "single construction acceptance" to "full-process dynamic control." Compared with the existing technology that relies solely on water tightness test results to judge waterproofing quality, the technical solution of this application can detect potential problems such as air bubbles, pinholes, missed areas, hollow areas, and horizontal water seepage at doorways in advance during the waterproofing construction process, and carry out targeted repairs and re-inspections before subsequent processes are opened. This reduces the risk of leakage problems being exposed only after decoration is completed, and improves the overall reliability, durability, and project quality stability of the bathroom waterproofing system.

[0069] 2. This technical solution employs differentiated additional reinforcement structures at high-risk points such as doorways, corners, pipe roots, floor drains, and water supply points. Combined with an extended waterproof zone at the doorway, visual humidity detection points, anti-water-crossing structures, and a non-contact finished product protection system, it effectively blocks the path of bathroom moisture spreading outwards along doorways, corners, and wall penetrations. Simultaneously, by using non-contact support blocks and anti-stepping covers to create an elevated protective space during the finished product protection phase, it avoids damage, scratches, and localized failures to the waterproof layer caused by overlapping construction work. This improves the integrity and stability of the waterproof layer before and after water tightness testing, thereby enhancing the waterproofing performance and safety of the bathroom in later use. Attached Figure Description

[0070] Figure 1 This is a flowchart of the front-end of the closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection of the present invention.

[0071] Figure 2 This is a flowchart illustrating the initial water tightness test, horizontal water flow detection at the doorway, and the permitting process for the protective layer construction of this invention.

[0072] Figure 3 This is a flowchart illustrating the protective layer construction, secondary water tightness test, and subsequent process handover of the present invention.

[0073] Figure 4 This is a schematic diagram of the waterproof doorway extension node and the visual humidity detection point of the present invention.

[0074] Figure 5 This is a detailed structural diagram of the visual humidity detection point of the present invention.

[0075] Attached label: 1. Visual humidity detection point; 11. Water guide channel; 12. Capillary guide layer; 13. Water-sensitive color-changing detection layer; 14. Sealing cap; Detailed Implementation

[0076] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0078] Example 1

[0079] refer to Figure 1-3 This embodiment provides a closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection, applicable to the waterproofing construction process of indoor bathrooms in buildings such as residences, apartments, hotels, and office buildings. This method links base treatment, additional reinforcement at high-risk nodes, waterproof coating construction, defect identification and repair, initial water tightness test, horizontal water seepage detection at doorways, protective layer construction, secondary water tightness test, and finished product protection status control to form a closed-loop control system for construction, verification, repair, and handover.

[0080] Specifically, the steps are as follows.

[0081] S1, Base Treatment

[0082] Before construction, inspect and clean the bathroom substrate, removing laitance, dust, oil, and loose layers to expose a solid base. For cracks, holes, and pipe penetrations, use waterproof mortar, leak-stopping materials, or sealants to repair them, ensuring a firm bond between the repaired area and the surrounding substrate.

[0083] Next, the ground is leveled and sloped towards the drain. After sloping, the inside and outside corners are rounded to create a smooth transition, preventing stress concentration at right angles from causing the waterproof coating to crack. Once the base layer is treated, the surface should be firm, flat, free of standing water and loose sand, thus forming a base layer that meets the adhesion requirements of the waterproof coating.

[0084] S2, High-risk node additional enhancement processing

[0085] After the base layer treatment is deemed satisfactory, additional reinforcement treatment is applied to all high-risk areas in the bathroom. These high-risk areas include doorways, corners, pipe roots, floor drains, and water supply points.

[0086] At the entrance, a waterproof zone extending outwards from the bathroom doorway is first formed. As one implementation, this waterproof zone extends 300mm to 800mm outwards, preferably 500mm. Simultaneously, lateral waterproof zones are formed on both sides of the doorway, extending 100mm to 300mm on each side, preferably 200mm.

[0087] refer to Figure 4-5A water-stopping curb, a waterproof mortar layer, a sealing layer, and a wet-laid threshold stone layer are sequentially installed at the doorway to form a water-proof structure. The water-stopping curb can be made of waterproof mortar or fine aggregate concrete, with a height of 10mm to 50mm, preferably 30mm. The waterproof mortar layer covers the water-stopping curb and its two sides, while the sealing layer is placed at the joint between the water-stopping curb, the waterproof mortar layer, and the wet-laid threshold stone layer to block horizontal water flow channels in the doorway area. When laying the wet-laid threshold stone layer, ensure that the underlying mortar is fully filled to avoid creating through gaps.

[0088] A visual humidity detection point is installed at the end of the waterproof zone extending from the doorway. This visual humidity detection point includes a water-guiding channel, a capillary layer, a water-sensitive color-changing detection layer, and a sealing cap. The water-guiding channel is located at the end of the waterproof zone and can be arranged along the width of the doorway. The capillary layer is laid within the water-guiding channel and can be made of non-woven fabric, fiber strips, or absorbent paper tape with water-absorbing and water-guiding capabilities. The water-sensitive color-changing detection layer is a humidity detection card laid on top of the capillary layer. The water-guiding channel is covered with a sealing cap made of transparent acrylic sheet. The humidity detection card can be directly observed through the transparent acrylic sheet to determine whether moisture has reached the end of the waterproof zone.

[0089] Regarding the placement of the water guide channel, the inner bottom surface of the water guide channel needs to be lower than the first coat of waterproof coating; specifically, it is necessary to cut out a groove in the original concrete floor slab to place the water guide channel, or to reserve a groove during leveling, with a groove depth of 5-10mm.

[0090] At the internal and external corners, a rounded transition layer, a first additional waterproof layer, a carcass reinforcement layer, and a second covering waterproof layer are sequentially installed. The rounded transition layer is firmly bonded to the base surface. The first additional waterproof layer covers the rounded transition layer and the areas on both sides thereof. The carcass reinforcement layer is laid on the first additional waterproof layer. The second covering waterproof layer covers the carcass reinforcement layer and continuously overlaps with the surrounding waterproof coating.

[0091] At the pipe root, an annular groove is set along the outer perimeter of the pipe, and a sealing filling layer is set inside the annular groove. The sealing filling layer can be filled with a flexible sealing material. A flexible covering layer is set around the outer perimeter of the pipe root, and a waterproof covering layer is constructed on the outside of the flexible covering layer to form a continuous waterproof covering structure in the pipe root area.

[0092] A grooved sealing layer, a sloping water collection layer, and an additional waterproof layer are installed around the drain. The grooved sealing layer seals the gap between the drain and the base layer, the sloping water collection layer directs water flow towards the drain, and the additional waterproof layer covers the base layer around the drain and continuously overlaps with the waterproof coating on the ground.

[0093] A sealing layer and a surrounding additional waterproof layer are installed around the water supply points. The sealing layer is used to seal the pores around the water supply points, and the surrounding additional waterproof layer is continuously installed around the water supply points to prevent leakage channels from forming around them.

[0094] S3. Waterproof coating application

[0095] Multiple coats of waterproof coating are applied to the base layer and high-risk joint areas after additional reinforcement treatment. The waterproof coating can be JS waterproof coating or cement-based waterproof coating. In this embodiment, the waterproof coating is applied in 3 coats, but 2 to 4 coats can also be applied according to design requirements.

[0096] When applying the first coat of waterproofing coating, high-risk areas should be prioritized for application, followed by a general coat of waterproofing coating on the floor and walls. Subsequent coats should be applied only after the first coat has reached a surface-dry or fully-dry state. The application directions of adjacent coats can be staggered to minimize missed areas.

[0097] After the waterproof coating has formed, the dry film thickness of the waterproof coating on the ground should be controlled at 1.5mm, which falls within the range of 1.2mm to 2.0mm; the dry film thickness of the waterproof coating on the wall should be controlled at 1.2mm, which falls within the range of 1.0mm to 1.8mm. For high-risk areas such as doorways, corners, pipe roots, floor drains, and water supply points, the waterproof coating should be continuously bonded to the additional reinforcement layer, without any breaks, curling edges, or hollow areas.

[0098] S4. Defect identification, repair, and review

[0099] After at least one coat of waterproof coating is applied, defects are identified on the coating surface. In this embodiment, a visual inspection is performed after each coat of waterproof coating is applied and reaches a surface dry state; a visual inspection and local thickness measurement are performed after the final coat of waterproof coating has formed.

[0100] The defects include bubble defects, pinhole defects, particle defects, missed brushing areas, peeling or hollow areas.

[0101] For bubble defects, cut open the bubble area to release the internal gas and moisture, and apply a new layer of waterproof coating after the defective area has dried. For pinhole defects, locally seal and apply a new layer of waterproof coating to completely cover the pinholes. For particle defects, first grind down the raised particles, then remove dust and loose particles, and then apply a new layer of waterproof coating. For missed areas, apply a new layer of waterproof coating directly to create a continuous waterproof film. For peeling or blistering areas, cut off the peeling or blistering area down to the edge of a firmly bonded substrate or a qualified waterproof coating, and then reapply the waterproof coating.

[0102] During repair, the repaired area should overlap the original waterproof coating with a 100mm overlap width, which should be between 50mm and 150mm. The dry film thickness of the repaired area should not be less than 80% of the thickness of the adjacent qualified waterproof coating. After the repair is completed, a visual inspection or thickness test should be performed again; only after passing the re-inspection can the next step be carried out.

[0103] S5. Switch to the first finished product protection state and conduct the first water tightness test.

[0104] After the waterproof coating has formed and passed inspection, the bathroom entrance and the waterproof construction area will be switched to the first finished product protection state.

[0105] The first finished product protection state includes: setting up a removable doorway barrier and entrance / exit closure sign at the bathroom entrance; setting up a restricted work passage in the waterproofing construction area; and installing non-contact support pads for the waterproofing layer, an anti-trampling cover plate, and edge limiting components for the cover plate within the restricted work passage area. The anti-trampling cover plate is positioned across the waterproofing construction area via the non-contact support pads, creating a gap between the lower surface of the anti-trampling cover plate and the waterproofing coating, preventing the anti-trampling cover plate from directly pressing against or adhering to the waterproofing coating. The edge limiting components for the cover plate are used to restrict lateral slippage of the anti-trampling cover plate.

[0106] The first water tightness test is conducted under the initial protective condition of the finished product. Before the water tightness test, the floor drains are sealed, water is filled to the predetermined level, and the test water level is maintained stable for a specified time. During the water tightness test, personnel are not allowed to step on the waterproofing construction area at will. If inspection is necessary, passage is only permitted within the designated work area through the anti-stepping cover.

[0107] S6, Horizontal water seepage detection at the entrance

[0108] During the initial water tightness test, observation points or water-blocking test points are set up on the outer side of the waterproof zone extending from the doorway. Observation points can be set on the ground surface, wall base, or the junction of the outer side of the waterproof zone, to observe for any visible water, damp marks, or discoloration. Water-blocking test points can be set up on the outer side of the waterproof zone using absorbent strips, dry paper tape, or localized water-blocking materials to determine whether moisture has crossed the waterproof zone.

[0109] Simultaneously, a visual humidity detection point at the end of the waterproof area extending from the doorway is used for auxiliary judgment. When the capillary guide layer in the water channel absorbs moisture and directs it to the water-sensitive color-changing detection layer, the humidity detection card changes color; this color change can be directly observed through the sealed cover made of transparent acrylic sheet. If no wet marks, visible water, or color change appear at the observation point or water-blocking detection point, and the visual humidity detection point does not indicate that moisture has arrived, it is determined that there is no horizontal water seepage in the waterproof area extending from the doorway. If wet marks, visible water, or color change appear at the observation point or water-blocking detection point, or if the humidity detection card changes color, it is determined that there is horizontal water seepage in the waterproof area extending from the doorway.

[0110] S7. Judgment of the results of the first water tightness test and permitting the construction of the protective layer.

[0111] After the initial water tightness test is completed, the results of the initial water tightness test and the test results of the observation points or water-blocking detection points will be used to determine whether the construction of the protective layer is allowed.

[0112] When the initial water tightness test is passed and no horizontal water seepage is detected at the doorway, the first finished product protection status is switched to the protective layer construction permit status, allowing the protective layer construction to proceed under controlled protection conditions. These controlled protection conditions include: restricting unauthorized personnel from entering through removable barriers at the doorway; indicating the construction status through closed signage at entrances and exits; limiting personnel access through designated work areas; and preventing direct damage to the waterproof coating by construction personnel, tools, or materials through non-contact support pads, anti-trampling covers, and edge limiting devices on the covers.

[0113] If the initial water tightness test fails, or if horizontal water seepage is detected at the doorway, maintain or restore the initial finished product protection state, and locate the leakage area, defect area, or water seepage area. After location, return to the defect repair and re-inspection steps according to the defect type. For example, when horizontal water seepage is found at the doorway, focus on checking whether there are through gaps between the outer waterproof area of ​​the doorway, the water-stop threshold, the waterproof mortar layer, the sealing layer, and the wet-laid threshold stone layer; when leakage is found around the floor drain, focus on checking the additional waterproof layer around the floor drain, the groove sealing layer, and the sloped water collection layer. After the repair is completed and the re-inspection is passed, repeat the initial water tightness test and the horizontal water seepage test at the doorway.

[0114] S8. Protective layer construction and second finished product protection status.

[0115] During and after the construction of the protective layer, the bathroom entrance and the area covered by the protective layer will be switched to the second finished product protection state.

[0116] A cement mortar protective layer can be used. Construction should be carried out only when permitted under the protective layer construction conditions, and material transportation and personnel access should be restricted to the designated work area. Construction tools must not directly impact or scratch the waterproof coating; when spreading the protective layer, avoid concentrated material accumulation to prevent excessive local loads that could damage the waterproof coating.

[0117] The second stage of finished product protection includes: installing a removable barrier and entrance / exit closure signs at the bathroom entrance; establishing a restricted work area within the protective layer area; and installing non-contact support pads for the waterproof layer, anti-trampling covers, and edge limiting devices for the covers within the restricted work area. The anti-trampling covers are positioned above the waterproofing construction area or areas where the protective layer has not yet reached its required strength, using the non-contact support pads, to prevent personnel from directly stepping on the protective layer that has not reached its specified strength or disturbing the waterproof coating beneath it.

[0118] S9, Secondary water tightness test

[0119] After the protective layer is completed and meets the allowable water tightness conditions, a second water tightness test is conducted under the second finished product protection condition. The second water tightness test is used to verify whether the construction process of the protective layer has damaged the waterproof coating, and also to verify the overall waterproof reliability after the protective layer is completed.

[0120] During the second water tightness test, continue to maintain the removable barrier at the entrance, the closed signs at the entrance and exit, and the restricted work area to prevent unauthorized personnel from entering the restroom or piling materials in the protective layer area. During the water tightness test, check the space under the restroom, the base of the walls, the base of the pipes, the area around the floor drain, the waterproof area extending from the entrance, and the area around the water supply points for any leaks or dampness.

[0121] S10. Judgment of the results of the secondary water tightness test and handover of subsequent procedures.

[0122] The decision on whether to allow subsequent tiling or decoration work to proceed will be based on the results of the second water tightness test.

[0123] Once the secondary water tightness test is passed, the second finished product protection status should be lifted or adjusted, and the work should be handed over to the subsequent tiling or decoration construction process. When lifting or adjusting the second finished product protection status, removable barriers at the entrance, closure signs at entrances and exits, or partial anti-trampling covers can be retained to meet the finished product protection needs during the subsequent tiling or decoration construction.

[0124] If the secondary water tightness test fails, maintain the second finished product protection state and return to perform defect repair, protective layer restoration, and secondary water tightness retesting. Specifically, first locate the leakage area or defect area, partially remove the corresponding protective layer to expose the defective parts of the waterproof coating; then repair according to the treatment methods for bubble defects, pinhole defects, particle defects, missed areas, peeling or hollow areas, so that the repaired area overlaps with the original waterproof coating by 50mm to 150mm, and ensure that the local dry film thickness after repair is not less than 80% of the thickness of the adjacent qualified waterproof coating; after repair, restore the protective layer, and conduct the secondary water tightness retest again under the second finished product protection state. Only after the secondary water tightness retest is passed can the subsequent tiling or decoration construction process be carried out.

[0125] Example 2

[0126] refer to Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the waterproof coating used is a cement-based waterproof coating, and the application is done in four coats. The first coat is used for sealing the substrate and pre-coating joints; the second coat is used for overall film formation; the third coat is used to reinforce high-risk joint areas; and the fourth coat is used for overall coverage. The dry film thickness of the waterproof coating on the ground is controlled at 1.8 mm, and the dry film thickness of the waterproof coating on the wall is controlled at 1.5 mm.

[0127] In this embodiment, the outer waterproof zone of the doorway extends 800mm outwards towards the outside of the bathroom, and the lateral waterproof zone extends 300mm along both sides of the doorway. The height of the water-stop threshold is 50mm. A visual humidity detection point is set at the end of the outer waterproof zone of the doorway. The water guide channel is a shallow channel structure arranged along the width of the doorway. A capillary guide layer is laid at the bottom of the water guide channel, and the humidity detection card is laid on the capillary guide layer. A sealing cap made of transparent acrylic sheet is sealed to the periphery of the water guide channel.

[0128] During the initial water tightness test, after water is stored in the bathroom, if there is horizontal water seepage at the doorway, the moisture will migrate outwards along the outer waterproof zone or its weakest points, and be absorbed by the capillary layer and guided to the humidity detection card, causing the humidity detection card to change color. Construction workers can directly determine whether moisture has reached the end of the outer waterproof zone at the doorway through a transparent acrylic sheet, thus improving the intuitiveness and operability of the horizontal water seepage detection at the doorway.

[0129] Example 3

[0130] The difference between this embodiment and Embodiment 1 is that the defect identification adopts a multi-pass identification method. After each coat of waterproof coating is applied, the coating surface is identified for defects, including bubble defects, pinhole defects, particle defects, missed areas, peeling or hollow areas.

[0131] When particle defects appear in the first coat of waterproof coating, the defective areas are first sanded, and the dust generated from sanding is cleaned before applying a new coat. When pinhole defects appear in the second coat of waterproof coating, the pinhole defects are locally sealed and repaired. When peeling or hollow areas appear in the third coat of waterproof coating, the peeling or hollow areas are cut off and a new waterproof coating is applied. Each repair should overlap the repaired area with the original waterproof coating by 100mm. After the repair is completed, a visual inspection or thickness test is performed.

[0132] By identifying, repairing, and re-inspecting in the above manner, defects can be avoided from being difficult to detect in time after being covered by the next layer of waterproof coating, and the final waterproof coating can meet the requirements of the water tightness test in terms of integrity, continuity and thickness.

[0133] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection, comprising the following steps: S1. Treat the bathroom substrate to form a substrate that meets the requirements for waterproof coating adhesion; S2. Perform additional reinforcement treatment on all high-risk nodes in the bathroom. High-risk nodes include, but are not limited to, doorways, corners, pipe roots, floor drains, and water supply points. Form an extended waterproof zone at the doorway that extends outwards from the bathroom. Set up a visual humidity detection point at the end of the extended waterproof zone. S3. Apply multiple coats of waterproof coating to the base layer and the high-risk node areas after additional reinforcement treatment. S4. After at least one coat of waterproof coating is applied, identify defects on the coating surface, repair defective areas, and re-inspect. S5. After the waterproof coating has formed, switch the bathroom doorway and the waterproof construction area to the first finished product protection state, and conduct the first water tightness test in the first finished product protection state. S6. During the first water tightness test, an observation point or water-blocking detection point is set on the outside of the waterproof area extending from the doorway. The observation point or water-blocking detection point is used to determine whether there is horizontal water flow in the waterproof area extending from the doorway. S7. Determine whether protective layer construction is permitted based on the results of the initial water tightness test and the test results of the observation point or water-blocking detection point; when the initial water tightness test is qualified and no horizontal water flow at the doorway is detected, switch the first finished product protection state to the protective layer construction permission state, and allow the protective layer construction under controlled protection conditions; when the initial water tightness test is unqualified or horizontal water flow at the doorway is detected, maintain or restore the first finished product protection state, locate the leakage area, defect area or water flow area, and return to execute the defect repair and re-inspection steps; S8. During and after the construction of the protective layer, switch the bathroom doorway and the protective layer area to the second finished product protection state. S9. Conduct a second water tightness test under the second finished product protection state; S10. Determine whether to allow the handover of subsequent tiling or decoration construction procedures based on the results of the secondary water tightness test; when the secondary water tightness test is qualified, release or adjust the second finished product protection status and hand over to the subsequent procedures; when the secondary water tightness test is unqualified, maintain the second finished product protection status and return to the defect repair, protective layer restoration and secondary water tightness retest steps.

2. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The visual humidity detection point includes a water guide channel set at the end of the waterproof area outside the door, a capillary guide layer laid in the water guide channel, and a water-sensitive color-changing detection layer. The water-sensitive color-changing detection layer is a humidity detection card, which is laid on the capillary guide layer, and the water guide trough is covered with a sealing cover made of transparent acrylic sheet.

3. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, S1 includes: Remove laitance, dust, oil, and loose layers from the base surface; Seal and repair cracks, holes, and pipeline crossings in the base layer; Leveling and sloping the ground is required; The inside and outside corners are treated as rounded transition structures; This ensures that the base surface is firm, flat, free of standing water, and free of sand.

4. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The additional enhancements to the doorway include: An extended waterproof zone is formed at the bathroom doorway, extending outwards from the bathroom entrance; A laterally extended waterproof zone is formed on both sides of the entrance; A water-stopping sill, a waterproof mortar layer, a sealing layer, and a wet-laid threshold stone layer are sequentially installed at the entrance to form a water-proof structure.

5. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The extended waterproof area extends 300mm to 800mm outward from the bathroom; The lateral waterproof zone extends 100mm to 300mm along both sides of the doorway; The height of the water-stopping sill is 10mm to 50mm.

6. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The additional enhancements for the high-risk nodes include: A rounded transition layer, a first additional waterproof layer, a tire body reinforcement layer, and a second covering waterproof layer are installed at the internal and external corners; An annular groove, a sealing filling layer, a flexible wrapping layer, and a waterproof covering layer are installed at the pipe root. A grooved sealing layer, a sloping water collection layer, and an additional waterproof layer are installed around the floor drain; A sealing layer and a surrounding additional waterproof layer are installed around the water supply points.

7. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The waterproof coating is a JS waterproof coating or a cement-based waterproof coating. The waterproof coating is applied in 2 to 4 coats. The next coat of waterproofing coating should be applied after the previous coat has reached a surface-dry or fully-dry state. The dry film thickness of the waterproof coating on the ground is 1.2mm to 2.0mm; The dry film thickness of the waterproof coating on the wall is 1.0mm to 1.8mm.

8. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 1, characterized in that, The defects include, but are not limited to, bubble defects, pinhole defects, particle defects, missed brushing areas, peeling or hollow areas. S4 includes: The bubble defects are cut open, vented, dried, and repaired. Local sealing and repair of pinhole defects; Grinding, cleaning, and brushing are performed to remove particle defects; Touch up any missed areas; After removing the peeling or hollow areas, reapply the waterproof coating. This will allow the repaired area to overlap with the original waterproof coating.

9. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to claim 8, characterized in that, The overlap width between the repaired area and the original waterproof coating is 50mm to 150mm; The thickness of the repaired dry film should not be less than 80% of the thickness of the adjacent qualified waterproof coating. After the repair is completed, a visual inspection or thickness test should be performed again.

10. The closed-loop control method for bathroom waterproofing construction, water tightness verification, and finished product protection according to any one of claims 1 or 9, characterized in that, The first and second finished product protection states include setting up a detachable doorway barrier and an entrance / exit closure sign at the bathroom entrance, setting up a restricted work passage area in the waterproof construction area, and setting up a non-contact support pad for the waterproof layer, an anti-stepping cover plate, and edge limiting components for the cover plate within the restricted work passage area. The anti-trampling cover is installed above the waterproof construction area via a non-contact support pad of the waterproof layer.

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