A heat-insulating and leakage-proof structure for external wall
By installing a multi-layered waterproof and thermal insulation structure on the exterior wall, including a waterproof layer, a mortar layer, and an alkali-resistant fiberglass mesh, combined with plastic expansion tubes and fixing anchors, the reliability and waterproofing issues of the exterior wall insulation structure are solved, achieving a stable insulation system and a waterproof effect without dead corners.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREENTOWN REAL ESTATE CONSTR & MANAGEMENT GRP CO LTD
- Filing Date
- 2025-01-22
- Publication Date
- 2026-05-29
AI Technical Summary
In existing external wall insulation structures, relying solely on insulation boards results in poor insulation reliability. After long-term use, the structural integrity decreases, and waterproofing boards are inconvenient to install and cannot be installed tightly in special locations, leading to poor waterproofing performance.
The system employs a first and second waterproof layer on the base wall, combined with insulation board, mortar layer, and alkali-resistant fiberglass mesh. The insulation board is securely connected using plastic expansion tubes and anchor bolts. Finally, a flexible water-resistant putty layer and a stone-like paint layer are applied to the exterior to enhance waterproof performance.
It achieves the stability and waterproof performance of the insulation system under external factors such as temperature changes and wind force, avoids cracks or damage, ensures the stability and durability of the building, and achieves a waterproof effect without dead angles.
Smart Images

Figure CN224300194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of external wall waterproofing technology, and in particular to an external wall insulation and waterproofing structure. Background Technology
[0002] Exterior wall waterproofing refers to a series of measures taken during the construction of building exterior walls to prevent water from seeping into the interior of the wall, protect the building structure from water erosion, and extend the service life of the building. Exterior wall waterproofing is not only related to the durability of the building, but also directly affects the comfort and safety of the indoor environment.
[0003] Currently, most external wall insulation structures use insulation boards to block and insulate heat, thereby improving the building's insulation effect. In contrast, anti-seepage structures use waterproof boards to block and waterproof, thereby improving waterproofing and extending the building's service life.
[0004] However, relying solely on insulation boards for insulation is not only unreliable, but also leads to a significant decrease in overall structural strength over time, thus reducing the effectiveness of the insulation. As for waterproofing with waterproof boards, it is not only difficult to install and fix the waterproof boards, but also cannot be installed tightly in different locations and corners. Therefore, in special scenarios, it may fail to achieve the purpose of waterproofing.
[0005] To address the aforementioned problems, this utility model document proposes an external wall insulation and anti-leakage structure. Utility Model Content
[0006] This utility model provides an external wall insulation and anti-leakage structure, which solves the problems of existing technologies where insulation boards alone are used for insulation, resulting in poor reliability and a significant decrease in overall structural strength over long-term use, thus reducing the firmness of the insulation. Waterproof boards are not only difficult to install and fix, but also cannot be installed tightly in different locations and corners, thus failing to achieve the purpose of waterproofing in special scenarios.
[0007] This utility model provides the following technical solution:
[0008] External wall insulation and waterproofing structure, including:
[0009] A base wall, wherein an insulation board is provided on one side of the base wall, a first waterproof layer is provided on the surface of the base wall near the insulation board, and a second waterproof layer is provided on the surface of the insulation board away from the base wall;
[0010] A mortar layer is provided on the side of the insulation board near the second waterproof layer, and an alkali-resistant fiberglass mesh is bonded and fixed on the mortar layer.
[0011] In one possible design, multiple mounting holes and multiple through holes are respectively opened on one side of the base wall and inside the insulation board, and a plastic expansion tube is snapped into the inside of each mounting hole and multiple through holes.
[0012] In one possible design, each of the plastic expansion tubes has a threaded anchor bolt inside for fixing the insulation board to the base wall.
[0013] In one possible design, a flexible water-resistant putty layer is provided on the side of the alkali-resistant fiberglass mesh away from the mortar layer, and a stone-like paint coating layer is provided on the side of the flexible water-resistant putty layer away from the alkali-resistant fiberglass mesh.
[0014] In one possible design, the insulation board is an expanded polystyrene board.
[0015] In one possible design, both the first and second waterproof layers are polyurethane waterproof coatings.
[0016] In this application, during use, the base wall, as the main supporting structure of the building, is first treated to be smooth and clean, providing a good foundation for subsequent waterproofing and insulation layer construction. A first waterproof layer (polyurethane waterproof coating) is applied to the side of the base wall near the insulation board. This first waterproof layer has excellent waterproof performance and weather resistance, effectively preventing moisture from penetrating from the outside of the wall to the inside, thereby protecting the stability and durability of the building structure. The insulation board (expanded polystyrene board) is tightly bonded to the first waterproof layer of the base wall, forming a continuous insulation layer. Expanded polystyrene board, due to its good thermal insulation performance and lightweight characteristics, is widely used in building exterior wall insulation systems. To ensure a firm connection between the insulation board and the base wall, multiple installation holes are pre-drilled in the base wall, while through holes corresponding to the installation holes are drilled inside the insulation board. Plastic expansion tubes are snapped into the installation holes and through holes. Their design allows them to expand and be firmly fixed in the holes when subjected to external force, providing stable support for subsequent fixing anchors. The fixing anchors are threaded into the plastic expansion tubes. By tightening the anchors, the insulation board can be firmly fixed to the base wall, forming a stable insulation system. On the side of the insulation board away from the base wall, a second waterproof layer (polyurethane waterproof coating) is applied, further enhancing the waterproof performance of the structure and ensuring that moisture does not penetrate into the interior of the wall through the insulation board.
[0017] Next, a mortar layer is laid on the second waterproof layer of the insulation board. The mortar layer not only acts as a bond but also enhances the overall strength of the insulation system. The alkali-resistant fiberglass mesh is firmly bonded to the mortar layer. Its high strength and corrosion resistance make the insulation system more stable when facing external factors such as temperature changes and wind, and less prone to cracking or damage. On the side of the alkali-resistant fiberglass mesh away from the mortar layer, a flexible water-resistant putty layer is applied. The putty layer not only has excellent water resistance but also provides a certain degree of flexibility to resist minor deformations caused by external factors. The outermost layer is a stone-like paint coating layer, which provides a rich selection of colors and textures, while also having good weather resistance and water resistance, enabling it to maintain the beauty and integrity of the building's exterior walls for a long time.
[0018] In this utility model, the external wall insulation and anti-seepage structure, through the setting of a first waterproof layer, a second waterproof layer, a mortar layer and an alkali-resistant fiberglass mesh structure, the waterproof layer has excellent waterproof performance and weather resistance, which can effectively prevent moisture from seeping from the outside of the wall into the inside, thereby protecting the stability and durability of the building structure. At the same time, it can make the insulation system more stable when facing external factors such as temperature changes and wind, and less prone to cracks or damage.
[0019] In this utility model, the external wall insulation and anti-seepage structure, through the setting of through holes, installation holes, plastic expansion tubes and fixed anchor bolts, can fix the insulation board tightly to the base wall by tightening the anchor bolts, thus forming a stable insulation system.
[0020] This invention makes the insulation system more stable when facing external factors such as temperature changes and wind, and less prone to cracks or damage. It enhances its high strength and corrosion resistance, and further improves the excellent waterproof performance and weather resistance of the wall. It can effectively prevent moisture from seeping from the outside of the wall into the inside, thereby protecting the stability and durability of the building structure and achieving waterproofing without any blind spots. Attached Figure Description
[0021] Figure 1 A schematic diagram of the main structure of the external wall insulation and anti-seepage structure provided in this embodiment of the utility model;
[0022] Figure 2 A schematic diagram of the hidden base wall and insulation board state structure of the external wall insulation and anti-seepage structure provided in this embodiment of the utility model;
[0023] Figure 3 A schematic diagram of the base wall structure of the external wall insulation and anti-seepage structure provided in this embodiment of the utility model;
[0024] Figure 4 This is a schematic diagram of the insulation board structure of the external wall insulation and anti-seepage structure provided in the embodiment of this utility model.
[0025] Figure label:
[0026] 1. Base wall; 2. First waterproof layer; 3. Insulation board; 4. Second waterproof layer; 5. Through hole; 6. Mounting hole; 7. Plastic expansion tube; 8. Fixing anchor bolt; 9. Mortar layer; 10. Alkali-resistant fiberglass mesh; 11. Flexible water-resistant putty layer; 12. Stone paint coating layer. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0028] Example 1
[0029] Please refer to Figures 1-4 Leak-proof structure, including:
[0030] The base wall 1 has an insulation board 3 installed on one side. A first waterproof layer 2 is installed on the surface of the base wall 1 near the insulation board 3, and a second waterproof layer 4 is installed on the surface of the insulation board 3 away from the base wall 1. A layer of the first waterproof layer 2 (polyurethane waterproof coating) is coated on the side of the base wall 1 near the insulation board 3. The first waterproof layer 2 has excellent waterproof performance and weather resistance, and can effectively prevent moisture from penetrating from the outside of the wall to the inside, thereby protecting the stability and durability of the building structure. The insulation board 3 (expanded polystyrene board) is tightly attached to the first waterproof layer 2 of the base wall 1 to form a continuous insulation layer.
[0031] A mortar layer 9 is provided on the side of the insulation board 3 near the second waterproof layer 4. An alkali-resistant fiberglass mesh 10 is bonded and fixed on the mortar layer 9. The mortar layer 9 not only plays a bonding role, but also enhances the overall strength of the insulation system. The alkali-resistant fiberglass mesh 10 is firmly bonded to the mortar layer 9. Its high strength and corrosion resistance make the insulation system more stable when facing external factors such as temperature changes and wind, and it is not easy to crack or break.
[0032] Multiple mounting holes 6 and multiple through holes 5 are respectively opened on one side of the base wall 1 and inside the insulation board 3. A plastic expansion tube 7 is snapped into the inside of each mounting hole 6 and multiple through holes 5. The plastic expansion tube 7 is snapped into the mounting hole 6 and through hole 5. Its design allows it to expand and be firmly fixed in the hole when subjected to external force, providing stable support for the subsequent fixing anchor bolts 8.
[0033] Each plastic expansion tube 7 has a threaded anchor 8 inside, which is used to install and fix the insulation board 3 to the base wall 1. The anchor 8 is threaded into the plastic expansion tube 7. By tightening the anchor, the insulation board 3 can be firmly fixed to the base wall 1, ensuring a firm connection between the insulation board 3 and the base wall 1, forming a stable insulation system.
[0034] This application can be used in the field of external wall waterproofing, or in other fields applicable to this application.
[0035] Example 2
[0036] refer to Figure 1 and Figure 2 An improvement based on Example 1: an external wall insulation and waterproofing structure, which is applied to the field of external wall waterproofing.
[0037] A flexible water-resistant putty layer 11 is applied to the side of the alkali-resistant fiberglass mesh 10 away from the mortar layer 9. This putty layer not only has excellent water resistance but also provides a certain degree of flexibility to resist minor deformations caused by external factors. A stone-like paint layer 12 is applied to the side of the flexible water-resistant putty layer 11 away from the alkali-resistant fiberglass mesh 10. This stone-like paint layer 12 offers a rich selection of colors and textures, while also possessing good weather resistance and water resistance, enabling it to maintain the aesthetics and integrity of the building's exterior walls for a long time.
[0038] Insulation board 3 is expanded polystyrene board. Expanded polystyrene board is widely used in building exterior wall insulation systems due to its good thermal insulation performance and lightweight properties.
[0039] The first waterproof layer 2 and the second waterproof layer 4 are both polyurethane waterproof coatings. The waterproof layers have excellent waterproof performance and weather resistance, and can effectively prevent moisture from penetrating from the outside of the wall to the inside, thereby protecting the stability and durability of the building structure.
[0040] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. An external wall insulation and leak-proof structure, characterized in that, include: The base wall (1) is provided with an insulation board (3) on one side. The surface of the base wall (1) near the insulation board (3) is provided with a first waterproof layer (2). The surface of the insulation board (3) away from the base wall (1) is provided with a second waterproof layer (4). A mortar layer (9) is provided on the side of the insulation board (3) near the second waterproof layer (4), and an alkali-resistant fiberglass mesh (10) is bonded and fixed on the mortar layer (9). Multiple mounting holes (6) and multiple through holes (5) are respectively provided on one side of the base wall (1) and inside the insulation board (3). A plastic expansion tube (7) is snapped into the inside of each mounting hole (6) and multiple through holes (5). Each of the plastic expansion tubes (7) has a threaded anchor (8) inside for fixing the insulation board (3) to the base wall (1).
2. The external wall insulation and waterproofing structure according to claim 1, characterized in that, A flexible water-resistant putty layer (11) is provided on the side of the alkali-resistant fiberglass mesh (10) away from the mortar layer (9), and a real stone paint coating layer (12) is provided on the side of the flexible water-resistant putty layer (11) away from the alkali-resistant fiberglass mesh (10).
3. The external wall insulation and waterproofing structure according to claim 1, characterized in that, The insulation board (3) is an expanded polystyrene board.
4. The external wall insulation and waterproofing structure according to claim 1, characterized in that, Both the first waterproof layer (2) and the second waterproof layer (4) are polyurethane waterproof coatings.