A root-penetration resistant waterproof membrane for green roofs
By using a six-layer roll structure and overlay design, combined with chemical root inhibitors and base materials, the problem of edge curling at the seams of the waterproof roll was solved, achieving higher waterproof and root penetration resistance performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-31
AI Technical Summary
Existing waterproof membranes are prone to curling at adjacent seams, resulting in a decrease in overall waterproof performance.
The roll material features a six-layer structure, comprising layers one through six. Through the installation of overlays at the joints between adjacent roll bodies, combined with chemical root inhibitors and base materials, it enhances waterproofing and root penetration resistance.
It effectively prevents the edges of the membrane from curling up during installation, improves waterproof performance and root penetration resistance, ensures the adhesion between the membrane and the ground, and enhances the overall waterproof effect.
Smart Images

Figure CN224578967U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waterproof membrane technology, specifically a root-penetration resistant waterproof membrane for green roofs. Background Technology
[0002] Waterproof membrane is a flexible building material that can be rolled up and used in building walls, roofs, tunnels, highways, landfills, etc., to resist external rainwater and groundwater seepage. As a leak-proof connection between the foundation and the building, it is the first line of defense in the entire waterproofing project and plays a crucial role. With my country's economic development, continuous urban expansion, and rising living standards, land prices in large and medium-sized cities are constantly increasing, resulting in a shrinking green space in people's living environments. Currently, gardens are often built on rooftops and underground planting slabs, which beautify the environment, purify the air, and provide rooftop rest areas and recreational activities, offering multiple benefits.
[0003] During the installation of waterproof membrane, we often encounter a tricky problem: the seams between adjacent membrane sections are prone to curling. This curling not only allows water to easily seep from the seam to the bottom of the membrane, but also spreads laterally along the membrane surface. This significantly reduces the adhesion between the membrane and the ground, leading to localized bulging of the membrane. Ultimately, all of this will have a serious negative impact on the overall waterproofing performance of the membrane. Utility Model Content
[0004] The purpose of this utility model is to provide a root-penetration resistant waterproof membrane for green roofs, which aims to solve the problem that the joints of adjacent waterproof membranes in the prior art are prone to curling, resulting in low overall waterproof performance.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: the root-penetration resistant waterproof membrane for green roofs includes a membrane body and an overlay component;
[0006] The roll material consists of several main bodies, which are spliced together to form an overall waterproof structure for the roof. The pressing component is pressed onto the joint of adjacent roll material main bodies.
[0007] The main body of the roll material comprises, from top to bottom, a first layer, a second layer, a third layer, a fourth layer, a fifth layer, and a sixth layer;
[0008] The first, second, third, fourth, fifth, and sixth layers are stacked sequentially from top to bottom to form a waterproof membrane;
[0009] Two adjacent fourth layers are spliced together to form a first cavity, and the pressing component can be detachably installed in the first cavity.
[0010] Preferably, the pressing component includes an upper-level connector, an intermediate-level connector, and a lower-level connector;
[0011] The lower end of the upper connector is fixedly connected to the upper end of the middle connector, and the lower end of the middle connector is fixedly connected to the upper end of the lower connector. The upper connector, the middle connector, and the lower connector form an I-shaped structure.
[0012] The upper-level connector, intermediate-level connector, and lower-level connector are installed at the seams of adjacent roll bodies.
[0013] Preferably, the lower-level connector is installed inside the first cavity;
[0014] The intermediate connector is located at the seam of adjacent roll bodies, and the upper connector is pressed onto two adjacent first layers.
[0015] Preferably, the third layer includes a ring frame and a cross-shaped fixing rod;
[0016] The ring frame is attached end-to-end between the second and fourth layers;
[0017] The cross-shaped fixing rod is fixed inside the ring frame, and the cross-shaped fixing rod divides the space enclosed by the ring frame into several second cavities;
[0018] The second cavity contains a chemical root inhibitor.
[0019] Preferably, the fourth layer includes a plurality of vertical bars spaced apart horizontally and extending in the front-to-back direction and a plurality of horizontal bars spaced apart horizontally and extending in the left-to-right direction.
[0020] Several vertical bars and several horizontal bars are intersected and fixedly connected to form a grid-like structure;
[0021] The grid-shaped structure contains a base material component.
[0022] Preferably, the first, second, fifth, and sixth layers are all identical, and the first, second, fifth, and sixth layers are made of EPDM rubber.
[0023] The beneficial effects are: 1. During the installation of the roll material, we can cleverly place the pressing component in the first cavity of the fourth layer. Then, the upper connector is pressed onto the two adjacent first layers, thereby effectively pressing the edges of the roll material. This operation method can effectively prevent the roll material from curling during the laying process, ensuring the smooth progress of the entire laying process.
[0024] 2. The main body of the roll material includes a first layer, a second layer, a third layer, a fourth layer, a fifth layer, and a sixth layer. The six layers improve the waterproofness of the main body of the roll material. The third layer is filled with a chemical root inhibitor, and the fourth layer is filled with a base material. The chemical root inhibitor and the base material improve the root penetration resistance. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of the pressing component of this utility model installed on the main body of the roll material;
[0026] Figure 2 This is a schematic diagram of the structure of the main body of the roll material of this utility model;
[0027] Figure 3 This is a structural diagram of the disassembled main body of the roll material of this utility model;
[0028] Figure 4 This is a partial cross-sectional structural diagram of the main body of the roll material of this utility model.
[0029] In the diagram: 101, first layer; 102, second layer; 103, third layer; 1031, ring frame; 1032, cross fixing rod; 104, fourth layer; 1041, vertical rod; 1042, horizontal rod; 105, fifth layer; 106, sixth layer; 2, pressing component; 201, upper-level connector; 202, intermediate-level connector; 203, lower-level connector; 4, second cavity; 5, chemical root inhibitor; 6, base material component. Detailed Implementation
[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0031] A root-penetration resistant waterproof membrane for green roofs is mainly used to install the pressing component 2 inside the membrane body during the laying process, so as to press the membrane body and prevent the membrane body from curling at the edges during laying, thus reducing the service life of the membrane body.
[0032] In this embodiment, the root-penetration resistant waterproof membrane includes a membrane body and an overlay 2. There are several membrane bodies, and the membrane bodies are spliced together to form an overall waterproof structure of the roof. The overlay 2 is overlaid on the joint between two adjacent membrane bodies.
[0033] like Figures 1-4 As shown, the main body of the roll material consists of six layers, which improves the waterproofing and root penetration prevention effects.
[0034] Specifically, the main body of the roll material includes, from top to bottom, a first layer 101, a second layer 102, a third layer 103, a fourth layer 104, a fifth layer 105, and a sixth layer 106. The first layer 101, the second layer 102, the third layer 103, the fourth layer 104, the fifth layer 105, and the sixth layer 106 are stacked from top to bottom to form a waterproof roll material. In this embodiment, the first layer 101 and the second layer 102 can waterproof the surface, while the fifth layer 105 and the sixth layer 106 can waterproof the roof. The third layer 103 and the fourth layer 104 can improve the root penetration resistance. Two adjacent fourth layers 104 are spliced together to form a first cavity. The pressing component 2 can be detachably installed in the first cavity. When the fourth layer 104 is being installed, the pressing component 2 can be installed in the first cavity to improve the waterproofness of the spliced two adjacent roll material main bodies.
[0035] The third layer 103 includes a ring frame 1031 and a cross-shaped fixing rod 1032. The ring frame 1031 is connected end to end and pasted between the second layer 102 and the fourth layer 104. The cross-shaped fixing rod 1032 is fixed inside the ring frame 1031, and the cross-shaped fixing rod 1032 divides the space enclosed by the ring frame 1031 into several second cavities 4. A chemical root inhibitor 5 is placed in the second cavity 4. In this embodiment, the principle and structure of the chemical root inhibitor 5 are existing technologies and will not be described in detail here.
[0036] In this embodiment, the third layer 103 can strengthen the firmness of the roll material body through the ring frame 1031 and the cross fixing rod 1032, and can also limit the chemical root inhibitor 5 to prevent the chemical root inhibitor 5 from spreading out.
[0037] The fourth layer 104 includes several vertical bars 1041 that are spaced apart from left to right and extend in the front-back direction, and several horizontal bars 1042 that are spaced apart from front to back and extend in the left-right direction; the several vertical bars 1041 and several horizontal bars 1042 are cross-fixedly connected to form a grid structure; a base material component 6 is provided in the grid structure. In this embodiment, the structure and principle of the base material component 6 are existing technologies and will not be described in detail here.
[0038] In this embodiment, the first cavity can be used as both the mounting base for the base material 6 and the mounting base for the pressing component 2.
[0039] The first layer 101, the second layer 102, the fifth layer 105, and the sixth layer 106 are all the same. The first layer 101, the second layer 102, the fifth layer 105, and the sixth layer 106 are made of EPDM rubber. In this embodiment, the structure and principle of EPDM rubber are existing technologies and will not be described in detail here.
[0040] like Figure 1As shown, the pressing component 2 is installed inside the roll body, which can not only improve the installation stability of the pressing component 2, but also prevent the roll body from curling.
[0041] Specifically, the pressing component 2 includes an upper connector 201, an intermediate connector 202, and a lower connector 203; the lower end of the upper connector 201 is fixedly connected to the upper end of the intermediate connector 202, and the lower end of the intermediate connector 202 is fixedly connected to the upper end of the lower connector 203. The upper connector 201, the intermediate connector 202, and the lower connector 203 form an I-shaped structure, and the I-shaped structure is installed at the joint of two adjacent roll bodies.
[0042] The lower-level connector 203 is installed in the first cavity; the intermediate-level connector 202 is located at the joint of adjacent roll bodies; and the upper-level connector 201 is pressed onto the two adjacent first layers 101. In this embodiment, the upper-level connector 201 is a frustum structure to prevent water from flowing into the joint of the two adjacent roll bodies.
[0043] Working principle: In use, the first layer 101, the second layer 102, the third layer 103, the fourth layer 104, the fifth layer 105, and the sixth layer 106 are connected by adhesive. First, the sixth layer 106 is installed on the roof. Then, the fifth layer 105 is adhered on top of the sixth layer 106. Next, the fourth layer 104 is adhered on top of the fifth layer 105. After the fourth layer 104 is installed, the base material 6 is filled into the first cavity inside the fourth layer 104, and the lower connecting part 203 of the pressing part 2 is installed in the first cavity. After the connector 203 is installed, the third layer 103 is pasted onto the fourth layer 104 to cover the first cavity of the third layer 103. This restricts the movement of the base material 6 and also presses down on the lower connector 203. Then, the chemical root inhibitor 5 is placed in the second cavity 4 of the third layer 103. After placement, the second layer 102 is pasted onto the third layer 103. Finally, the first layer 101 is pasted onto the second layer 102 so that the upper connector 201 presses down on the first layer 101, preventing the main body of the roll material from curling.
[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A root resistant waterproofing membrane for a vegetated roof, characterized in that, Includes the roll body and the overlay (2); The roll body consists of several roll bodies, which are spliced together to form an overall waterproof structure of the roof. The pressing component (2) is pressed onto the joint of the adjacent roll body. The main body of the roll material includes, from top to bottom, a first layer (101), a second layer (102), a third layer (103), a fourth layer (104), a fifth layer (105), and a sixth layer (106). The first layer (101), the second layer (102), the third layer (103), the fourth layer (104), the fifth layer (105) and the sixth layer (106) are stacked from top to bottom to form a waterproof membrane; The two adjacent fourth layers (104) are spliced together to form a first cavity, and the pressing member (2) can be detachably installed in the first cavity.
2. A root resistant waterproofing membrane for a vegetated roof according to claim 1, characterized in that The pressing component (2) includes an upper connector (201), an intermediate connector (202), and a lower connector (203); The lower end of the upper connector (201) is fixedly connected to the upper end of the middle connector (202), and the lower end of the middle connector (202) is fixedly connected to the upper end of the lower connector (203). The upper connector (201), the middle connector (202) and the lower connector (203) form an I-shaped structure. The upper connector (201), the middle connector (202), and the lower connector (203) are installed at the seams of adjacent roll bodies.
3. A root resistant waterproofing membrane for a vegetated roof according to claim 2, wherein, The lower-level connector (203) is installed in the first cavity; The intermediate connector (202) is located at the seam of adjacent roll bodies, and the upper connector (201) is pressed onto two adjacent first layers (101).
4. A root resistant waterproofing membrane for a vegetated roof according to any one of claims 1 to 3, characterized in that The third layer (103) includes a ring frame (1031) and a cross-shaped fixing rod (1032). The ring frame (1031) is attached end to end between the second layer (102) and the fourth layer (104); The cross-shaped fixing rod (1032) is fixed inside the ring frame (1031), and the cross-shaped fixing rod (1032) divides the space enclosed by the ring frame (1031) into several second cavities (4). A chemical root inhibitor (5) is placed inside the second cavity (4).
5. A root resistant waterproofing membrane for use in a vegetated roof according to any one of claims 1 to 3, characterised in that, The fourth layer (104) includes a number of vertical bars (1041) spaced apart from left to right and extending in the front-back direction, and a number of horizontal bars (1042) spaced apart from left to right and extending in the left-back direction. Several vertical bars (1041) and several horizontal bars (1042) are intersected and fixedly connected to form a grid-like structure; The grid-shaped structure contains a base material component (6).
6. A root-penetration resistant waterproof membrane for green roofs according to any one of claims 1-3, characterized in that, The first layer (101), the second layer (102), the fifth layer (105) and the sixth layer (106) are all the same. The first layer (101), the second layer (102), the fifth layer (105) and the sixth layer (106) are made of EPDM rubber.