Waterproof and mildewproof treatment method applied to closed space
By using water glass and water-resistant cement to seal leaks in the basement storage room, combined with red brick and aerated concrete block wall base and multi-layer coating treatment, the problems of leakage and dampness in the basement storage room were solved, reducing maintenance costs and improving the anti-mildew effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAN UNDERGROUND IDLE SPACE COMMERCIAL OPERATION MANAGEMENT CO LTD
- Filing Date
- 2026-03-31
- Publication Date
- 2026-05-01
AI Technical Summary
The basement storage room suffers from poor ventilation and severe water seepage and leakage problems. Existing waterproofing and mildew prevention measures cannot solve the problem at its root, resulting in frequent repairs and high maintenance costs.
Water glass and water-non-diffusion cement are used to seal the leaks. Red bricks and aerated concrete blocks are piled up as the base layer, combined with multiple layers of treatment including penetrating primer, water-resistant putty for exterior walls, anti-mildew primer, inorganic anti-mildew topcoat, and latex paint.
It completely solved the problems of leakage and dampness in the basement storage room, reduced maintenance costs, and improved structural durability and mildew resistance.
Smart Images
Figure CN121952244A_ABST
Abstract
Description
A waterproof and mildew-proof treatment method for confined spaces Technical Field
[0001] This application relates to the technical field of waterproof and mildew-proof methods, and in particular to a waterproof and mildew-proof treatment method for use in enclosed spaces. Background Technology
[0002] Basement storage rooms, located on the lower levels of a building, are inherently structurally limited, resulting in poor ventilation, persistent dampness, and significant seasonal dampness issues. Furthermore, basement walls are mostly load-bearing, and many are located adjacent to the building's exterior. Under the influence of factors such as fluctuations in groundwater levels, soil pressure, and external water infiltration, these exterior walls are highly susceptible to water seepage and leakage, seriously threatening the safety of the space and the structural durability.
[0003] The commonly used solutions in the industry are mainly to apply waterproof materials and pressurized grouting to seal leaks. However, these methods are mostly emergency measures that only address the symptoms and not the root cause. Applying waterproof materials can easily lose their effectiveness due to factors such as dampness in the basement or structural deformation. Pressurized grouting can only seal existing leaks and cannot solve the core problems such as the continuous expansion of structural cracks and dynamic changes in external water pressure. Ultimately, this leads to repeated leaks and dampness, requiring frequent secondary or even multiple repairs, which not only increases maintenance costs but also continuously interferes with the normal use of basement storage rooms. Summary of the Invention
[0004] The purpose of this invention is to provide a waterproof and mildew-proof treatment method for enclosed spaces, so as to completely solve the technical problems of leakage and dampness in basement storage rooms. The specific technical solution is as follows: This invention provides a waterproof and mildew-proof treatment method for enclosed spaces, which is carried out according to the following steps: Step S1: Clean the original wall putty until the original wall to be constructed is exposed; inject water glass and water-non-diffusing cement into the leakage points of the original wall to obtain a pre-treated original wall; Step S2: Vertically build a brick wall base on the outside of the pre-treated original wall obtained in Step S1, the lower part of the brick wall base is a red brick wall base, and the upper part of the brick wall base is an aerated concrete block brick wall base; Step S3: Evenly spray a waterproof and mildew-proof coating on the outside of the brick wall base obtained in Step S2. Step S3: Apply a primer coat and allow it to cure for 2-3 days to obtain a penetrating primer layer. Step S4: Apply two coats of water-resistant exterior wall putty evenly to the outside of the penetrating primer layer obtained in Step S3. After it is completely dry, sand it to obtain a waterproof putty layer. Step S5: Apply one coat of anti-mildew primer evenly to the outside of the waterproof putty layer obtained in Step S4 to obtain an anti-mildew primer layer. Step S6: Apply two coats of inorganic anti-mildew topcoat evenly to the outside of the anti-mildew primer layer obtained in Step S5 to obtain an inorganic anti-mildew topcoat layer. Step S7: Apply latex paint to the outside of the inorganic anti-mildew topcoat layer obtained in Step S6 to obtain a latex paint layer.
[0005] In one possible embodiment, the height of the red brick wall base layer in step S2 is 40-60cm.
[0006] In one possible embodiment, the penetrating primer in step S3 comprises a resin, a curing agent, a penetrating aid, and a solvent.
[0007] In one possible embodiment, the resin is bisphenol A epoxy resin.
[0008] In one possible embodiment, the water-resistant putty for exterior walls described in step S4 contains lime powder, cement, and organic adhesive powder.
[0009] In one possible embodiment, the anti-mildew primer in step S5 comprises an organic resin and a chemical anti-mildew agent, wherein the organic resin is an acrylic emulsion and the chemical anti-mildew agent is an iodopropynyl compound.
[0010] In one possible embodiment, the inorganic anti-mildew topcoat in step S6 contains silicates and no organic components, and the pH of the inorganic anti-mildew topcoat is greater than 10.5.
[0011] In one possible embodiment, the latex paint in step S7 comprises a synthetic resin emulsion, fillers and additives, and also contains pigments.
[0012] In one possible embodiment, the spraying described in steps S3, S5 and S6 is performed using a spraying machine, and the sanding process described in step S4 is performed using a dust-free sander.
[0013] In one possible embodiment, the amount of water-resistant putty used in step S4 is 0.3-0.5 kg / m²; the amount of anti-mildew primer used in step S5 is 0.1-0.15 kg / m²; and the amount of inorganic anti-mildew topcoat used in step S6 is 0.2-0.25 kg / m².
[0014] Beneficial Effects: This invention provides a waterproof and mildew-proof treatment method for enclosed spaces. The method involves designing the lower part of the brick wall base as a red brick base, utilizing the low moisture absorption of red bricks to isolate ground moisture. Simultaneously, the upper part of the brick wall base is designed as an aerated concrete block base to avoid the problem of excessive wall weight. Then, a penetrating primer, exterior water-resistant putty, mildew-proof primer, inorganic mildew-proof topcoat, and latex paint are sequentially sprayed onto the outer side of the brick wall base. The exterior water-resistant putty and inorganic mildew-proof topcoat are sprayed twice, ensuring that this waterproof and mildew-proof treatment method for enclosed spaces can completely solve the problems of leakage and dampness in basement storage rooms, thereby reducing maintenance costs.
[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0017] Figure 1 is a schematic flowchart of a waterproof and mildew-proof treatment method for enclosed spaces according to the present invention. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of the present invention.
[0019] This application provides a waterproofing and mildew prevention method for enclosed spaces, primarily designed for basement storage rooms. On one hand, basement storage rooms suffer from severe seasonal dampness and generally have poor ventilation; on the other hand, because they are located on the lower floors of buildings and close to exterior walls, they are highly susceptible to water seepage and leakage, leading to severe leakage and dampness. Existing technologies often employ emergency measures such as applying waterproofing materials or pressurized grouting to seal leaks, but neither of these methods addresses the root cause of the leakage and dampness problem, and these issues frequently recur after repairs.
[0020] Therefore, this application provides a waterproof and mildew-proof treatment method for enclosed spaces. The basic concept is as follows: First, the original wall putty on the wall to be treated is cleaned. Second, water glass and non-diffusing cement in water are injected into the leaking and seeping areas to seal the water source. Then, a brick wall is built on the outside of the pre-treated original wall. The lower part of the brick wall is built with red bricks, and the upper part is built with aerated bricks. The red bricks are used to isolate the ground moisture due to their low moisture absorption, and the aerated bricks are used to avoid making the wall too heavy due to their light weight. Finally, a penetrating primer, water-resistant exterior wall putty, mildew-proof primer, inorganic mildew-proof topcoat, and latex paint are sprayed sequentially on the outside of the brick wall to completely solve the problems of leakage and dampness in the basement storage room.
[0021] This application provides a waterproof and mildew-proof treatment method for enclosed spaces, as shown in Figure 1. Figure 1 is a flowchart of a waterproof and mildew-proof treatment method for enclosed spaces according to the present invention, which is carried out according to the following steps: Step S1: Clean the original wall putty until the original wall to be constructed is exposed; inject water glass and water-non-diffused cement into the leakage points of the original wall to obtain a pre-treated original wall.
[0022] In step S1: First, the original wall is pre-treated. The pre-treatment includes two aspects: First, the original wall putty is cleaned until the original wall to be constructed is completely exposed; Second, water glass and non-diffusing cement in water are injected into the seepage and leakage points of the original wall using a cement grouting machine.
[0023] Sodium silicate is used as a filler in water glass to prevent seepage and leakage. The effects of injecting water glass at seepage and leakage points are as follows: First, water glass reacts rapidly with water to form a gel-like substance, which can quickly fill the leakage channels and seal the seepage and leakage points. Second, the reacted gel-like substance combines with the concrete, sand, and other materials in the original wall, increasing the density and structural strength of the original wall and preventing repeated leaks due to a loose structure. Third, the gel structure formed by water glass can fill the tiny pores in the original wall, blocking the water penetration path and fundamentally enhancing the original wall's impermeability.
[0024] In addition, water-dispersible cement, as the name suggests, is a type of cement that does not disperse in water. The main function of water-dispersible cement is to accurately inject it into the cracks where water seeps and leaks, without being washed away by water flow, ensuring that all the material works on the leaking area. Secondly, after water-dispersible cement hardens, it can form a high-strength cement structure that firmly bonds with the original wall, not only sealing leaks but also repairing and reinforcing damaged wall structures.
[0025] Step S2: On the outside of the pre-treated original wall obtained in step S1, a brick wall base is built vertically. The lower part of the brick wall base is a red brick wall base, and the upper part of the brick wall base is an aerated concrete block brick wall base. Further, the height of the red brick wall base in step S2 is 40-60cm.
[0026] In step S2: A brick wall base is built vertically on the outside of the pre-treated original wall. The lower part of the brick wall base is built with red bricks and the upper part is built with aerated concrete blocks. This is mainly because red bricks have high structural strength and weak water conductivity and hygroscopicity, but they are heavy. Aerated concrete blocks have poor structural strength, strong water conductivity and hygroscopicity, but are lighter. The weak hygroscopicity of red bricks is used to isolate the ground moisture, and the light weight of aerated concrete blocks is used to avoid making the wall too heavy.
[0027] Step S3: Apply a penetrating primer evenly to the outer side of the brick wall base obtained in step S2 using a spraying machine. After spraying, cure for 2-3 days to obtain a penetrating primer layer. Further, the penetrating primer in step S3 includes resin, curing agent, penetrating aid and solvent. Further, the resin is bisphenol A epoxy resin.
[0028] In step S3: The sprayed penetrating primer, also known as a penetrating sealing primer, is a sealant used for substrate surface treatment. It mainly consists of resin, curing agent, penetrating aid, and solvent. Its function is to penetrate into the pores and cracks on the outer surface of the brick wall substrate, altering the microstructure of the substrate surface through physical penetration and chemical cross-linking, providing a stable foundation for subsequent coatings or repair materials. In this step, the resin is epoxy resin, specifically bisphenol A epoxy resin. Epoxy resin allows for deeper penetration and stronger bonding, which is beneficial for providing a stable foundation for the next step. In other embodiments, the resin can also be acrylic resin. The curing process generally involves maintaining set temperature and humidity conditions, followed by a settling period.
[0029] Step S4: Apply two coats of water-resistant exterior wall putty evenly to the outside of the penetrating primer layer obtained in step S3. The amount of water-resistant exterior wall putty used is 0.3-0.5KG / ㎡. After it is completely dry, it is sanded with a dust-free sander to obtain a waterproof putty layer. Further, the water-resistant exterior wall putty in step S4 contains lime powder, cement and organic adhesive powder.
[0030] In step S4: Apply exterior wall water-resistant putty evenly to the outside of the penetrating primer layer. Two coats of exterior wall water-resistant putty are required, with a usage of 0.3-0.5 kg / m². After the applied exterior wall water-resistant putty dries, sand it using a dust-free sander to obtain the final waterproof putty layer. In this step, the exterior wall water-resistant putty is a filler material for wall surface preparation, mainly used to fill pores and correct wall smoothness before painting. Its main components are lime powder, cement, and organic adhesive powder. Due to the waterproof and crack-resistant properties of the waterproof putty layer, it is suitable for the damp environment of basements, thus helping to prevent moisture in basement storage rooms.
[0031] Step S5: Apply a uniform coat of anti-mildew primer to the outer side of the waterproof putty layer obtained in step S4 using a spraying machine. The amount of anti-mildew primer used is 0.1-0.15KG / ㎡, resulting in an anti-mildew primer layer. Further, the anti-mildew primer in step S5 contains an organic resin and a chemical anti-mildew agent. The organic resin is an acrylic emulsion, and the chemical anti-mildew agent is an iodopropynyl compound.
[0032] In step S5: An anti-mildew primer is sprayed onto the outside of the waterproof putty layer. As the first layer of the coating system, the anti-mildew primer primarily functions to seal the substrate, resist alkali, prevent moisture, and prevent mold, providing a good adhesion base for the topcoat and emphasizing functional protection. The anti-mildew primer contains organic resin and a chemical anti-mildew agent; specifically, the organic resin is an acrylic emulsion, and the chemical anti-mildew agent is an iodopropynyl compound. In this step, the organic resin, i.e., the acrylic emulsion, is used as the base, and the chemical anti-mildew agent, i.e., the iodopropynyl compound, is added to inhibit mold growth.
[0033] Step S6: Apply two coats of inorganic anti-mildew topcoat evenly to the outer side of the anti-mildew primer layer obtained in step S5 using a spraying machine. The amount of inorganic anti-mildew topcoat used is 0.2-0.25 KG / ㎡, resulting in an inorganic anti-mildew topcoat layer. Further, the inorganic anti-mildew topcoat in step S6 contains silicates and does not contain organic components, and the pH of the inorganic anti-mildew topcoat is greater than 10.5.
[0034] In step S6: An inorganic anti-mold topcoat is sprayed on the outside of the anti-mold primer layer. The inorganic anti-mold topcoat is sprayed twice, and the amount of inorganic anti-mold topcoat used is 0.2-0.25KG / ㎡. Specifically, the inorganic anti-mold topcoat is further defined as containing silicates and containing no organic components, and the pH of the inorganic anti-mold topcoat is >10.5. In this step, the pH of the inorganic anti-mold topcoat being greater than 10.5 is conducive to killing mold spores, allowing water vapor to escape through the porous structure, and preventing mold growth due to the absence of nutrient sources. Secondly, as the final decorative layer, the inorganic anti-mold topcoat layer not only provides decorative effects such as color, gloss, and scrub resistance, but also achieves a long-lasting anti-mold effect by relying on the alkaline environment and breathability of the inorganic material itself.
[0035] Step S7: Apply latex paint to the outer side of the inorganic anti-mildew topcoat layer obtained in step S6 to obtain a latex paint layer; further, the latex paint in step S7 includes synthetic resin emulsion, fillers and additives, and also contains pigments.
[0036] In step S7: Latex paint 6 is a type of water-based coating formulated with synthetic resin emulsion as a base, adding pigments, fillers, and various additives. It is also known as synthetic resin emulsion paint and is a type of organic coating. Latex paint mainly includes polyvinyl acetate latex paint, ethylene propylene latex paint, and pure acrylic latex paint, etc. Depending on the applicable environment, it can be divided into interior wall latex paint and exterior wall latex paint. Based on the decorative gloss effect, it can be divided into matte, semi-gloss, satin, and gloss types. This application allows the use of interior wall latex paint, which can protect the wall and the primer.
[0037] Example 1
[0038] This invention applies a waterproof and mildew-proofing treatment method for enclosed spaces to a basement storage room in a residential building, and proceeds according to the following steps: Step S1: Clean the original wall putty in the basement storage room until the original wall to be constructed is exposed; and inject water glass and water-non-diffused cement into the leaks in the original wall to obtain a pre-treated original wall; Step S2: Vertically build a brick wall base on the outside of the pre-treated original wall obtained in Step S1, the lower part of which is a red brick wall base. The upper part is an aerated concrete block brick wall base, and the height of the red brick wall base is 40cm; Step S3: The outer side of the brick wall base obtained in step S2 is uniformly sprayed with a penetrating primer using a spraying machine. After spraying, it is cured for 2 days to obtain a penetrating primer layer. The penetrating primer contains resin, curing agent, penetrating aid and solvent, and the resin is bisphenol A epoxy resin; Step S4: Two coats of water-resistant exterior wall putty are uniformly applied to the outer side of the penetrating primer layer obtained in step S3. The amount of water-resistant exterior wall putty used is 0.3KG / After the surface is completely dry, it is sanded with a dust-free sander to obtain a waterproof putty layer; wherein, the exterior wall water-resistant putty contains lime powder, cement and organic adhesive powder; Step S5, the outer side of the waterproof putty layer obtained in step S4 is evenly sprayed with a coat of anti-mildew primer using a sprayer, the amount of anti-mildew primer used is 0.1KG / ㎡, to obtain an anti-mildew primer layer; wherein, the anti-mildew primer contains organic resin and chemical anti-mildew agent, the organic resin is acrylic emulsion, and the chemical anti-mildew agent is iodopropynyl compound; Step S 6. Two coats of inorganic anti-mildew topcoat are uniformly sprayed onto the outer side of the anti-mildew primer layer obtained in step S5 using a spraying machine. The amount of inorganic anti-mildew topcoat used is 0.2 kg / m², resulting in an inorganic anti-mildew topcoat layer. The inorganic anti-mildew topcoat contains silicates but no organic components, and its pH is 10.1. Step S7. Latex paint is applied to the outer side of the inorganic anti-mildew topcoat layer obtained in step S6 to obtain a latex paint layer. The latex paint contains synthetic resin emulsion, fillers, and additives, as well as pigments.
[0039] After five years of use, the basement storage room of a residential building treated with the waterproof and mildew-proof method of this invention for enclosed spaces has not experienced any leakage or dampness problems.
[0040] Example 2
[0041] This invention applies a waterproof and mildew-proofing treatment method for enclosed spaces to a storage room in the basement of a commercial building, and proceeds according to the following steps: Step S1: Clean the original wall putty in the storage room in the basement of the commercial building until the original wall to be constructed is exposed; and inject water glass and water-non-diffused cement into the leakage points of the original wall to obtain a pre-treated original wall; Step S2: Vertically build a brick wall base on the outside of the pre-treated original wall obtained in Step S1, the lower part of the brick wall base being a red brick wall base, and the upper part of the brick wall base... The base layer is an aerated concrete block brick wall; the height of the red brick wall base layer is 50cm; Step S3: A penetrating primer is evenly sprayed onto the outer side of the brick wall base layer obtained in Step S2 using a spraying machine, and cured for 2.5 days after spraying to obtain a penetrating primer layer; wherein, the penetrating primer contains resin, curing agent, penetrating aid and solvent; the resin is bisphenol A epoxy resin; Step S4: Two coats of water-resistant exterior wall putty are evenly applied to the outer side of the penetrating primer layer obtained in Step S3, and the amount of water-resistant exterior wall putty used is 0.4KG. / ㎡, after being completely dry, is sanded using a dust-free sander to obtain a waterproof putty layer; wherein, the exterior wall water-resistant putty contains lime powder, cement and organic adhesive powder; Step S5, the outer side of the waterproof putty layer obtained in step S4 is evenly sprayed with a coat of anti-mildew primer using a sprayer, the amount of anti-mildew primer used is 0.13KG / ㎡, to obtain an anti-mildew primer layer; wherein, the anti-mildew primer contains organic resin and chemical anti-mildew agent, the organic resin is acrylic emulsion, and the chemical anti-mildew agent is iodopropynyl compound; Step S 6. Two coats of inorganic anti-mildew topcoat are uniformly sprayed onto the outer side of the anti-mildew primer layer obtained in step S5 using a spraying machine. The amount of inorganic anti-mildew topcoat used is 0.23 kg / m², resulting in an inorganic anti-mildew topcoat layer. The inorganic anti-mildew topcoat contains silicates but no organic components, and its pH is 10.8. Step S7. Latex paint is applied to the outer side of the inorganic anti-mildew topcoat layer obtained in step S6 to obtain a latex paint layer. The latex paint contains synthetic resin emulsion, fillers, additives, and pigments.
[0042] After eight years of use, the basement storage room of the commercial building treated with the waterproof and mildew-proof method of this invention has not experienced any leakage or dampness problems.
[0043] Example 3
[0044] This invention applies a waterproof and mildew-proofing treatment method for enclosed spaces to a storage room in the basement of an office building, and proceeds according to the following steps: Step S1: Clean the original wall putty in the storage room in the basement of the office building until the original wall to be constructed is exposed; and inject water glass and water-non-diffusing cement into the leakage points of the original wall to obtain a pre-treated original wall; Step S2: Build a brick wall base layer vertically on the outside of the pre-treated original wall obtained in Step S1, the lower part of the brick wall base layer being a red brick wall base layer, the brick wall base layer... The upper part is an aerated concrete block brick wall base; wherein, the height of the red brick wall base is 60cm; Step S3, a penetrating primer is evenly sprayed onto the outer side of the brick wall base obtained in step S2 using a spraying machine, and cured for 3 days after spraying to obtain a penetrating primer layer; wherein, the penetrating primer contains resin, curing agent, penetrating aid and solvent; the resin is bisphenol A epoxy resin; Step S4, two coats of water-resistant exterior wall putty are evenly applied to the outer side of the penetrating primer layer obtained in step S3, and the amount of water-resistant exterior wall putty used is 0.5KG. / ㎡, after being completely dry, is sanded using a dust-free sander to obtain a waterproof putty layer; wherein, the exterior wall water-resistant putty contains lime powder, cement and organic adhesive powder; Step S5, the outer side of the waterproof putty layer obtained in step S4 is evenly sprayed with a coat of anti-mildew primer using a sprayer, the amount of anti-mildew primer used is 0.15KG / ㎡, to obtain an anti-mildew primer layer; wherein, the anti-mildew primer contains organic resin and chemical anti-mildew agent, the organic resin is acrylic emulsion, and the chemical anti-mildew agent is iodopropynyl compound; Step S6. Two coats of inorganic anti-mildew topcoat are uniformly sprayed onto the outer side of the anti-mildew primer layer obtained in step S5 using a spraying machine. The amount of inorganic anti-mildew topcoat used is 0.25 kg / m², resulting in an inorganic anti-mildew topcoat layer. The inorganic anti-mildew topcoat contains silicates but no organic components, and its pH is 11. Step S7. Latex paint is applied to the outer side of the inorganic anti-mildew topcoat layer obtained in step S6 to obtain a latex paint layer. The latex paint contains synthetic resin emulsion, fillers, and additives, as well as pigments.
[0045] After the office building's basement storage room was treated with the waterproof and mildew-proof treatment method of this invention for enclosed spaces, no leakage or dampness problems occurred even after ten years of use.
[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0047] The various embodiments in this specification are described in a related manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments. For related parts, please refer to the description of the method embodiment.
[0048] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.
Claims
1. A method for waterproofing and mildew prevention in enclosed spaces, characterized in that, The process is as follows: Step S1: Clean the original wall putty until the original wall surface is exposed; inject water glass and water-non-diffused cement into the leaks in the original wall to obtain a pre-treated original wall; Step S2: Vertically build a brick wall base on the outside of the pre-treated original wall obtained in Step S1, with the lower part of the brick wall base being a red brick base and the upper part being an aerated concrete block brick base; Step S3: Evenly spray a penetrating primer on the outside of the brick wall base obtained in Step S2, and cure for 2-3 days after spraying to obtain the desired finish. Step S4: Apply two coats of water-resistant exterior wall putty evenly to the outside of the penetrating primer layer obtained in step S3. After it is completely dry, sand it to obtain a waterproof putty layer. Step S5: Spray one coat of anti-mildew primer evenly to the outside of the waterproof putty layer obtained in step S4 to obtain an anti-mildew primer layer. Step S6: Spray two coats of inorganic anti-mildew topcoat evenly to the outside of the anti-mildew primer layer obtained in step S5 to obtain an inorganic anti-mildew topcoat layer. Step S7: Apply latex paint to the outside of the inorganic anti-mildew topcoat layer obtained in step S6 to obtain a latex paint layer.
2. The waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The height of the red brick wall base layer mentioned in step S2 is 40-60cm.
3. The waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The penetrating primer described in step S3 comprises resin, curing agent, penetrating aid, and solvent.
4. The waterproof and mildew-proof treatment method for confined spaces according to claim 3, characterized in that, The resin is bisphenol A epoxy resin.
5. A waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The water-resistant putty for exterior walls described in step S4 contains lime powder, cement, and organic adhesive powder.
6. The waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The anti-mildew primer in step S5 comprises an organic resin and a chemical anti-mildew agent, wherein the organic resin is an acrylic emulsion and the chemical anti-mildew agent is an iodopropynyl compound.
7. The waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The inorganic anti-mildew topcoat described in step S6 contains silicates but no organic components, and the pH of the inorganic anti-mildew topcoat is greater than 10.
5.
8. The waterproof and mildew-proof treatment method for confined spaces according to claim 1, characterized in that, The latex paint described in step S7 includes synthetic resin emulsion, fillers and additives, and also contains pigments.
9. A waterproof and mildew-proof treatment method for confined spaces according to any one of claims 1 to 8, characterized in that, The spraying described in steps S3, S5 and S6 is performed using a spraying machine, and the sanding process described in step S4 is performed using a dust-free sanding machine.
10. A method for waterproofing and mildew prevention in enclosed spaces according to any one of claims 1 to 8, characterized in that, The amount of water-resistant putty used in step S4 is 0.3-0.5 kg / m²; the amount of anti-mildew primer used in step S5 is 0.1-0.15 kg / m²; and the amount of inorganic anti-mildew topcoat used in step S6 is 0.2-0.25 kg / m².