Roof parapet flashing structure and construction method

Abstract

According to the roof parapet wall flashing structure and the construction method, a coiled material collecting head is arranged in a containing groove where the upper bottom face of the inner wall face of a parapet wall intersects with a roof panel, a coiled material protection plate is vertically arranged on the inward side of the coiled material collecting head, the upper end of the coiled material protection plate is fixed through a rivet, and the lower end of the coiled material protection plate abuts against a building block; the transverse movement of the coiled material protection plate is limited, so that the coiled material collecting head is pressed and fixed in the accommodating groove; the mortar surface layer of the inner wall and the coiled material protection plate with the rough surface have good bonding force, and the possibility that the mortar surface layer of the inner wall cracks and falls off can be effectively reduced; the inner wall mortar surface layer and the coiled material receiving head are separated by the coiled material protection plate, so that the influence of thermal expansion and cold contraction of the inner wall mortar surface layer on the coiled material receiving head is reduced, even if the inner wall mortar surface layer cracks and falls off, the coiled material protection plate can still cover and protect the coiled material receiving head, the aging, falling, bulging and cracking speeds of the coiled material receiving head are reduced, and the service life of the coiled material receiving head is prolonged. And the reliability and durability of the roof parapet flashing structure can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of roof drainage in fixed buildings, and in particular relates to a roof parapet flashing structure and a construction method. Background Art

[0002] The parapet, also known as the eaves wall, is a low wall around the roof of a building. In order to make the roof waterproof structure more stable and avoid water leakage at the intersection of the roof and the parapet, the roof waterproof layer is usually extended for a section and continuously covers the intersection with the parapet and the vertical surface between the parapet and the roof. This waterproof treatment is called roof parapet flashing, the parapet is called the flashing wall, and the vertical surface between the parapet and the roof is called the flashing surface.

[0003] At present, the flashing of the roof parapet wall mostly adopts the flashing structure of the roof parapet wall disclosed in Chinese patent CN213449191U. The construction process is generally to open a groove on the flashing surface first, then lay the waterproof roll on the roof, and make the waterproof roll continuously cover the intersection of the roof and the parapet wall and then continue to extend upward to form the roll head, press the end of the roll head into the groove and fix it with a buckle strip, fill the sealing groove with a sealing material, and finally apply a mortar layer on the outer side of the waterproof roll and the inner wall of the parapet wall; but this flashing structure After long-term use, due to the large difference in temperature expansion coefficients between the flashing wall and the roof, the thermal expansion and contraction are more obvious when the external temperature difference changes, and the mortar layer is attached to the relatively smooth surface of the waterproof membrane, the adhesion is insufficient, and it is easy to crack and fall off, which leads to the exposure of the waterproof membrane. Under the condition of exposure to sunlight and sudden changes in temperature, the waterproof membrane will age rapidly and fall off, bulge and crack, etc., eventually leading to waterproof failure and roof leakage. Therefore, the current parapet flashing structure has problems with poor reliability and durability, and needs to be further optimized in design. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a roof parapet flashing structure and a construction method to solve the current technical problem of poor durability of roof parapet flashing and to achieve the effect of improving the reliability and durability of the roof parapet flashing structure.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A roof parapet flashing structure comprises a roof panel and a parapet on the roof panel, wherein the inner wall surface of the parapet is provided with a receiving groove, the receiving groove extends downward and the bottom surface intersects with the roof panel, a waterproofing membrane is laid on the roof panel, the waterproofing membrane covers the intersection of the bottom surface of the receiving groove and the roof panel, and forms a membrane end extending upward in the receiving groove; a membrane protection plate is abutted on the inner side of the membrane end in the receiving groove, the upper end of the membrane protection plate is connected to the parapet by anchor nails arranged transversely through the receiving groove, a layer of blocks is provided on the waterproofing membrane, the blocks are higher than the lower end of the membrane protection plate and abut against the outer side of the membrane protection plate; a rigid protective layer covering the blocks is cast on the waterproofing membrane, the rigid protective layer is connected to the inner side of the membrane protection plate, the rigid protective layer is lower than the upper end of the membrane protection plate, the inner side of the membrane protection plate and the inner wall surface of the parapet are covered with an inner wall mortar surface layer, and the lower end of the inner wall mortar surface layer is connected to the rigid protective layer.

[0006] Furthermore, a first adhesive layer is provided between the coil end and the bottom surface of the accommodating groove, and a second adhesive layer is provided between the coil end and the coil protection plate.

[0007] Furthermore, there is a distance between the end of the roll material end and the upper side wall of the receiving groove, and there is a distance between the lower end of the roll material protection plate and the waterproof roll material. The second adhesive layer also fills the area between the end of the roll material end in the receiving groove and the upper side wall of the receiving groove, and the area between the lower end of the roll material protection plate and the waterproof roll material.

[0008] Furthermore, the inward side of the rolled material protection plate is flush with the inner wall surface of the parapet, and a first woven mesh is horizontally laid and fixed at the horizontal seam formed by the upper end of the rolled material protection plate and the inner wall surface of the parapet. The first woven mesh partially covers the inward side of the rolled material protection plate and the inner wall surface of the parapet, and the inner wall mortar surface layer covers the first woven mesh.

[0009] Furthermore, the first woven mesh is respectively connected to the coiled material protection plate, the inner wall surface of the parapet and the anchor nails.

[0010] Furthermore, there are a certain number of rolled material protection plates and they are arranged along the length direction of the parapet. A second woven mesh is vertically laid at the vertical seam formed by two adjacent rolled material protection plates. The second woven mesh partially covers the inward side of the two rolled material protection plates and is fixedly connected. The inner wall mortar surface layer covers the second woven mesh.

[0011] Furthermore, a circular arc transition surface is provided at the intersection of the bottom surface of the accommodating groove and the roof panel, and the waterproof membrane covers the circular arc transition surface to form a membrane end in the accommodating groove; on the inward side of the building block, a roof insulation board is also provided between the rigid protective layer and the waterproof membrane.

[0012] Furthermore, the outer wall surface of the parapet is paved with an outer wall insulation board, and the top surface of the parapet is paved with a capping board. A third adhesive layer is provided between the capping board and the top surface of the parapet. The capping board extends outward and covers the upper end of the outer wall insulation board. The capping board and the outer wall insulation board are respectively covered with a top mortar surface layer and an outer mortar surface layer; a third woven mesh is paved on the capping board. The third woven mesh extends downward from the outer edge of the capping board and partially covers the outer side surface of the outer wall insulation board. The top mortar surface layer and the outer mortar surface layer are respectively covered with the third woven mesh.

[0013] Furthermore, the top plate is divided into several platen sections along the length direction of the parapet, and the end faces of the platen sections in the length direction of the parapet are raised to form joint parts, and the two joint parts at the opposite ends of two adjacent platen sections are vertically overlapped and bonded, and the overlapping surfaces are matching inclined surfaces.

[0014] The present invention also includes a construction method for the roof parapet flashing structure, comprising the following steps: 1) A groove extending to the roof panel is reserved on the inner wall of the parapet, and mortar is applied at the intersection of the bottom of the groove and the roof panel to form an arc transition surface; 2) Lay the waterproofing membrane on the roof panel, and make the waterproofing membrane cover the arc transition surface and form the membrane end in the receiving groove, and spread the mortar between the bottom surface of the receiving groove and the membrane end to form the first bonding layer; 3) Fill the mortar in the receiving groove and level it above the waterproof membrane at the arc transition surface, spread the mortar on one side of the membrane protection plate and paste it on the membrane end, adjust the verticality of the membrane protection plate, and make the inner side of the membrane protection plate flush with the inner wall surface of the parapet, and the mortar on the inner side of the membrane end forms the second bonding layer; 4) Anchors are installed through the upper end of the membrane protection plate to connect it to the parapet, and a layer of blocks is laid on the waterproof membrane so that the blocks are in contact with the inner side of the membrane protection plate; 5) Lay the roof insulation board on the area of ​​the roof panel except the blocks, and cast on the roof insulation board and blocks to form a rigid protective layer; 6) Lay the first woven mesh at the horizontal joint formed by the upper end of the roll material protection board and the inner wall surface of the parapet, and lay the second woven mesh at the vertical joint formed by two adjacent roll material protection boards. Plaster the inner side of the roll material protection board and the inner wall surface of the parapet to form the inner wall mortar surface layer.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The roof parapet flashing structure of the present invention is that the coil end is arranged in the receiving groove where the bottom surface of the inner wall surface of the parapet intersects with the roof panel, and a coil protection plate is erected on the inner side of the coil end, the upper end of the coil protection plate is fixed by anchor nails and the lower end is abutted by blocks to limit the lateral movement of the coil protection plate, so as to press and fix the coil end in the receiving groove; the inner wall mortar surface layer and the coil protection plate with a relatively rough surface have good adhesion, which can effectively reduce the possibility of cracking and falling off of the inner wall mortar surface layer; the coil protection plate separates the inner wall mortar surface layer from the coil end, which is not only conducive to reducing the influence of the thermal expansion and contraction of the inner wall mortar surface layer on the coil end, but also even if the inner wall mortar surface layer cracks and falls off, the coil protection plate can still cover and protect the coil end, which is conducive to reducing the speed of aging, falling off, bulging and cracking of the coil end, and can effectively improve the reliability and durability of the roof parapet flashing structure.

[0016] 2. In the roof parapet flashing structure described in the present invention, the coil end is connected to the bottom surface of the receiving groove and the coil protection plate through the first adhesive layer and the second adhesive layer respectively, and the second adhesive layer cooperates with the first adhesive layer to fill the space in the receiving groove except the coil protection plate and the coil end, which not only improves the reliability of the connection between the coil protection plate, the coil end and the parapet and the overall strength of the flashing structure, but also the upper and lower ends of the coil protection plate are respectively connected to the upper side wall of the receiving groove and the roof panel through the second adhesive layer, and the end of the coil end is connected to the upper side wall of the receiving groove through the second adhesive layer, which is beneficial to reduce the possibility of rainwater entering the receiving groove and passing through the coil end to cause leakage, thereby improving the reliability of the flashing structure.

[0017] 3. The roof parapet flashing structure of the present invention comprises a first woven mesh laid at the horizontal joint formed between the upper end of the coiled material protection plate and the inner wall surface of the parapet, and a second woven mesh laid at the vertical joint formed between adjacent coiled material protection plates. This is not only beneficial to improving the adhesion between the inner wall mortar surface layer and the coiled material protection plate and the inner wall surface of the parapet, reducing the possibility of the inner wall mortar surface layer falling off, but also improves the structural strength of the inner wall mortar surface layer at the horizontal joints and the vertical joints, which is beneficial to reducing the possibility of the inner wall mortar surface layer cracking along the horizontal joints and the vertical joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the roof parapet flashing structure described in the embodiment; Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle; Figure 3 For along Figure 1 Schematic diagram of the cross section of the middle BB; Figure 4 for Figure 3 The enlarged schematic diagram of the center C; Among them, there are roof panel 1, parapet 2, waterproof membrane 3, membrane end 4, membrane protection plate 5, anchor nails 6, building blocks 7, rigid protective layer 8, inner wall mortar surface layer 9, first adhesive layer 10, second adhesive layer 11, first woven mesh 12, second woven mesh 13, arc transition surface 14, outer wall insulation board 15, top plate 16, third adhesive layer 17, top mortar surface layer 18, outer mortar surface layer 19, third woven mesh 20, pressure plate section 21, splicing part 22, roof insulation board 23. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Example: See also Figure 1 and Figure 2 A roof parapet 2 flashing structure includes a roof panel 1 and a parapet 2 on the roof panel 1. The inner wall surface of the parapet 2 has a receiving groove, which extends downward and intersects with the roof panel 1 at the bottom. A waterproof roll 3 is laid on the roof panel 1. The waterproof roll 3 covers the intersection of the bottom surface of the receiving groove and the roof panel 1, and forms a roll end 4 extending upward in the receiving groove. The roll end 4 is the part of the waterproof roll 3 located in the receiving groove. A roll protection plate 5 is abutted on the inner side of the roll end 4 in the receiving groove. The upper end of the roll protection plate 5 is connected to the parapet 2 through an anchor nail 6 that is transversely penetrated. A layer of waterproof roll 3 is provided on the waterproof roll 3. Building block 7, building block 7 is higher than the lower end of the coiled material protection plate 5 and abuts against the outward side of the coiled material protection plate 5; a rigid protective layer 8 covering the building block 7 is cast on the waterproof coiled material 3, the rigid protective layer 8 is in contact with the inward side of the coiled material protection plate 5, the rigid protective layer 8 is lower than the upper end of the coiled material protection plate 5, the inward side of the coiled material protection plate 5 and the inner wall surface of the parapet 2 are covered with an inner wall mortar surface layer 9, and the lower end of the inner wall mortar surface layer 9 is in contact with the rigid protective layer 8; during implementation, the coiled material protection plate 5 can be made of cement fiberboard or similar materials that are moisture-proof, anti-corrosion, anti-cracking, high in strength and have good adhesion to cement mortar, and the rigid protective layer 8 can be made of reinforced concrete.

[0021] The flashing structure of the roof parapet 2 described in the present invention is different from the current practice of setting a groove on the inner wall surface of the parapet 2 at the required height of the flashing structure, pressing and fixing the end of the coil end 4 in the groove, and then applying a mortar layer on the coil end 4 and the inner wall surface of the parapet 2; the present invention reserves or excavates a receiving groove on the inner wall surface of the parapet 2, the bottom surface of which intersects with the roof panel 1, so that the entire coil end 4 is located in the receiving groove, and a coil protection plate 5 is erected on the inner side of the coil end 4 in the receiving groove, the upper end of the coil protection plate 5 is fixedly connected to the parapet 2 by an anchor nail 6, and the lower end is abutted by a building block 7 to limit the lateral movement of the coil protection plate 5 , thereby pressing and fixing the coil end 4 in the accommodating groove; the inner wall mortar surface layer 9 is covered on the coil protection plate 5 with a relatively rough surface, and the two have good adhesion, which can effectively reduce the possibility of cracking and falling off of the inner wall mortar surface layer 9; the coil protection plate 5 separates the inner wall mortar surface layer 9 from the coil end 4, which is not only conducive to reducing the influence of thermal expansion and contraction of the inner wall mortar surface layer 9 on the coil end 4, but also even if the inner wall mortar surface layer 9 cracks or falls off, the coil protection plate 5 can still cover and protect the coil end 4, which is conducive to reducing the speed of aging, falling off, bulging and cracking of the coil end 4, and can effectively improve the reliability and durability of the flashing structure of the roof parapet 2.

[0022] See also Figure 1 and Figure 2 A first adhesive layer 10 is provided between the coil end 4 and the bottom surface of the receiving groove, and a second adhesive layer 11 is provided between the coil end 4 and the coil protection plate 5; during implementation, the first adhesive layer 10 adopts a special adhesive for waterproof coiled materials, which varies according to different waterproof coiled materials, and the second adhesive layer 11 adopts cement mortar; in this way, the coil end 4 is connected to the bottom surface of the receiving groove and the coil protection plate 5 through the first adhesive layer 10 and the second adhesive layer 11 respectively, which can improve the overall structural strength and help reduce the possibility of bulging and cracking of the coil end 4 after long-term use.

[0023] See also Figure 1 and Figure 2, there is a gap between the end of the coil end 4 and the upper side wall of the receiving groove, and there is a gap between the lower end of the coil protection plate 5 and the waterproof coil 3. The second adhesive layer 11 also fills the area between the end of the coil end 4 and the upper side wall of the receiving groove, and the area between the lower end of the coil protection plate 5 and the waterproof coil 3; during implementation, the gap between the upper end of the coil protection plate 5 and the upper side wall of the receiving groove is also filled by the second adhesive layer 11; in this way, the second adhesive layer 11 not only cooperates with the first adhesive layer 10 to fill the space in the receiving groove except the coil protection plate 5 and the coil end 4, but also improves the reliability of the connection between the coil protection plate 5, the coil end 4 and the parapet 2, which is beneficial to improving the overall structural strength, and the upper and lower ends of the coil protection plate 5 are respectively connected to the upper side wall of the receiving groove and the roof panel 1 through the second adhesive layer 11, and the end of the coil end 4 is connected to the upper side wall of the receiving groove through the second adhesive layer 11, which is beneficial to reduce the possibility of rainwater entering the receiving groove and passing through the coil end 4 to cause leakage.

[0024] See also Figure 2 and Figure 3 , the inner side of the coiled material protection plate 5 is flush with the inner wall surface of the parapet 2, and a first woven mesh 12 is horizontally laid and fixed at the horizontal seam formed by the upper end of the coiled material protection plate 5 and the inner wall surface of the parapet 2, and the first woven mesh 12 partially covers the inner side of the coiled material protection plate 5 and the inner wall surface of the parapet 2, and the inner wall mortar surface layer 9 covers the first woven mesh 12; in this embodiment, the first woven mesh 12 is not only connected to the coiled material protection plate 5 and the inner wall surface of the parapet 2, but also connected to the anchor 6; the first woven mesh 12 is made of steel wire mesh; in this way, the inner side of the coiled material protection plate 5 is flush with the inner wall surface of the parapet 2 is flush with the inner wall surface of the inner wall mortar surface layer 9, which is conducive to making the thickness of the inner wall mortar surface layer 9 uniform at all places, which is conducive to improving the integrity of the inner wall mortar surface layer 9 and reducing the possibility of local cracking and falling off; laying the first woven mesh 12 at the horizontal seam formed by the upper end of the coiled material protection plate 5 and the inner wall surface of the parapet 2 is not only conducive to improving the adhesion between the inner wall mortar surface layer 9 and the coiled material protection plate 5 and the inner wall surface of the parapet 2, reducing the possibility of the inner wall mortar surface layer 9 falling off, but also improving the structural strength of the inner wall mortar surface layer 9 at the horizontal seam, which is conducive to reducing the possibility of cracking of the inner wall mortar surface layer 9 along the horizontal seam.

[0025] See also Figure 3It is difficult to lay and fix a whole roll material protection plate 5 corresponding to the length of the parapet 2. Therefore, several roll material protection plates 5 of appropriate size should be selected and arranged along the length direction of the parapet 2. A second woven mesh 13 is vertically laid at the vertical seam formed by two adjacent roll material protection plates 5. The second woven mesh 13 partially covers the inner side of the two roll material protection plates 5 and is fixedly connected. The inner wall mortar surface layer 9 covers the second woven mesh 13; in this embodiment, the second woven mesh 13 is made of fiberglass mesh; in this way, by arranging the second woven mesh 13 on the roll material protection plate 5, it is not only beneficial to improve the adhesion between the inner wall mortar surface layer 9 and the roll material protection plate 5, but also reduces the possibility of the inner wall mortar surface layer 9 falling off, and improves the structural strength of the inner wall mortar surface layer 9 at the vertical seam, which is beneficial to reduce the possibility of the inner wall mortar surface layer 9 cracking along the vertical seam.

[0026] See also Figure 2 The intersection of the bottom surface of the accommodating groove and the roof panel 1 has an arc transition surface 14, and the waterproof membrane 3 covers the arc transition surface 14 to form a membrane end 4 in the accommodating groove; on the inner side of the building block 7, a roof insulation board 23 is also provided between the rigid protective layer 8 and the waterproof membrane 3; in this way, the waterproof membrane 3 bends along the arc transition surface 14 and extends upward. Compared with the right-angle transition, the bending degree of the waterproof membrane 3 is smaller and the stress condition is better, which is conducive to reducing the possibility of the waterproof membrane 3 breaking at the intersection.

[0027] In order to improve the flatness of the outer wall surface of the parapet 2, an outer wall insulation board 15 is generally laid on the outer wall surface of the parapet 2. However, due to the different material properties of the parapet 2, the outer wall insulation board 15 and the outer mortar surface layer 19, the insulation board is prone to hollowing and falling off, and the outer mortar surface layer 19 is cracked and peeled; please refer to Figure 1In this embodiment, an external wall insulation board 15 is laid on the external wall surface of the parapet 2, a top plate 16 is laid on the top surface of the parapet 2, a third adhesive layer 17 is arranged between the top plate 16 and the top surface of the parapet 2, the top plate 16 extends outward and covers the upper end of the external wall insulation board 15, and the top plate 16 and the external wall insulation board 15 are respectively covered with a top mortar surface layer 18 and an outer mortar surface layer 19; a third woven mesh 20 is laid on the top plate 16, the third woven mesh 20 extends downward from the outer edge of the top plate 16 and partially covers the outer side surface of the external wall insulation board 15, and the top mortar surface layer 18 and the outer mortar surface layer 19 respectively cover the third woven mesh 20; in this embodiment, the third woven mesh 20 adopts a glass fiber mesh; during implementation, the top plate 16 adopts a moisture-proof, anti-corrosion, anti-cracking, high-strength and cement-compatible The cement fiberboard or similar material with good mortar bonding properties, the third bonding layer 17 adopts cement mortar; in this way, the top plate 16 is bonded to the top surface of the parapet 2 through the third bonding layer 17, and then the third woven mesh 20 is laid based on the top plate 16, and the third woven mesh 20 is extended downward to cover the external wall insulation board 15, and finally the top mortar surface layer 18 and the outer mortar surface layer 19 are covered; not only the top plate 16 and the third woven mesh 20 cooperate to strengthen the bonding strength between the external wall insulation board 15 and the parapet 2, but also the third woven mesh 20 strengthens the bonding strength between the outer mortar surface layer 19 and the external wall insulation board 15, so that the parapet 2, the external wall insulation board 15 and the outer mortar surface layer 19 have better integrity, which is beneficial to reduce the possibility of the insulation board and the outer mortar surface layer 19 falling off.

[0028] See also Figure 3 and Figure 4 It is difficult to lay a whole top plate 16 corresponding to the length of the parapet 2. Therefore, the top plate 16 is divided into several platen sections 21 along the length direction of the parapet 2. The end surface protrusions of the platen sections 21 in the length direction of the parapet 2 form a splicing portion 22. The two splicing portions 22 at the opposite ends of two adjacent platen sections 21 are vertically overlapped and bonded, and the overlapping surfaces are matching inclined surfaces. During implementation, the splicing seams of adjacent platen sections 21 are sealed with waterproof slurry, such as cement-based waterproof material. In this way, the opposite ends of the two adjacent platen sections 21 are connected by bite through the splicing portions 22, which is beneficial to improving the connection strength of the adjacent platen sections 21 and the integrity of the top plate 16.

[0029] In order to further understand the flashing structure of the roof parapet wall 2 of the present invention, the construction method and steps thereof are introduced as follows: 1) A receiving groove extending to the roof panel 1 is reserved on the inner wall surface of the parapet 2, and mortar is used to form an arc transition surface 14 at the intersection of the bottom surface of the receiving groove and the roof panel 1; in this embodiment, the depth of the receiving groove is 30 mm; 2) Lay the waterproofing membrane 3 on the roof panel 1, and make the waterproofing membrane 3 cover the arc transition surface 14, form the membrane end 4 in the receiving groove, and spread the mortar between the bottom surface of the receiving groove and the membrane end 4 to form the first bonding layer 10; before laying the waterproofing membrane 3, the roof panel 1 should be tested for water, and the leakage points should be processed in advance; 3) Fill the mortar in the receiving groove and level it above the waterproof membrane 3 at the arc transition surface 14, spread the mortar on one side of the membrane protection plate 5 and paste it on the membrane end 4, adjust the verticality of the membrane protection plate 5, and make the inner side of the membrane protection plate 5 flush with the inner wall surface of the parapet 2, and the mortar on the inner side of the membrane end 4 forms the second adhesive layer 11; in this embodiment, both side surfaces of the membrane protection plate 5 are rough surfaces, so as to have a better bonding effect with the mortar; 4) Anchor nails 6 are provided through the upper end of the roll material protection plate 5 to connect with the parapet 2, and a layer of blocks 7 is laid on the waterproof roll material 3 so that the blocks 7 are in contact with the inner side of the roll material protection plate 5; 5) Lay the roof insulation board 23 on the area of ​​the roof panel 1 except the building blocks 7, cast the rigid protective layer 8 on the roof insulation board 23 and the building blocks 7, and promptly perform the cutting and filling with grease treatment to prevent the rigid protective layer 8 from cracking; 6) Lay a first woven mesh 12 at the horizontal seam formed between the upper end of the coiled material protection plate 5 and the inner wall surface of the parapet 2, lay a second woven mesh 13 at the vertical seam formed between two adjacent coiled material protection plates 5, and perform plastering construction on the inner side of the coiled material protection plate 5 and the inner wall surface of the parapet 2 to form an inner wall mortar surface layer 9; 7) Level the outer wall surface of the parapet 2 according to the design requirements, lay the outer wall insulation board 15 on the outer wall surface of the parapet 2, and make the upper end of the outer wall insulation board 15 lower than the top elevation of the parapet 2; 8) Spread mortar on the top surface of the parapet 2 and level it, lay the pressing plate sections 21, and use waterproof materials to seal the joints between the pressing plate sections 21; in this embodiment, both side surfaces of the pressing plate sections 21 are rough surfaces to achieve a better bonding effect with the mortar; 9) Lay a third woven mesh 20 at the junction of the top plate 16 and the external wall insulation board 15, and perform plastering construction on the top plate 16 and the external wall insulation board 15 to form a top mortar surface layer 18 and an outer mortar surface layer 19 respectively.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A roof parapet flashing structure, comprising a roof panel and a parapet on the roof panel, wherein the inner wall surface of the parapet has a receiving groove, and is characterized in that: The accommodating groove extends downward and its bottom surface intersects with the roof panel, and a waterproof membrane is laid on the roof panel. The waterproof membrane covers the intersection of the bottom surface of the accommodating groove and the roof panel and forms an upwardly extending membrane end in the accommodating groove; a membrane protection plate is abutted on the inward side of the membrane end in the accommodating groove, and the upper end of the membrane protection plate is connected to the parapet by anchor nails arranged horizontally through the membrane protection plate. A layer of blocks is provided on the waterproof membrane, and the blocks are higher than the lower end of the membrane protection plate and abut against the outward side of the membrane protection plate; a rigid protective layer covering the blocks is cast on the waterproof membrane, and the rigid protective layer is connected to the inward side of the membrane protection plate, and the rigid protective layer is lower than the upper end of the membrane protection plate. The inward side of the membrane protection plate and the inner wall surface of the parapet are covered with an inner wall mortar surface layer, and the lower end of the inner wall mortar surface layer is connected to the rigid protective layer.

2. A roof parapet flashing structure according to claim 1, characterized in that: A first adhesive layer is arranged between the coil end and the bottom surface of the accommodating groove, and a second adhesive layer is arranged between the coil end and the coil protection plate.

3. A roof parapet flashing structure according to claim 2, characterized in that: There is a distance between the end of the roll material end and the upper side wall of the accommodating groove, and there is a distance between the lower end of the roll material protection plate and the waterproof roll material. The second adhesive layer also fills the area between the end of the roll material end in the accommodating groove and the upper side wall of the accommodating groove, and the area between the lower end of the roll material protection plate and the waterproof roll material.

4. A roof parapet flashing structure according to claim 3, characterized in that: The inward side of the rolled material protection board is flush with the inner wall surface of the parapet, and a first woven mesh is laid and fixed horizontally at the horizontal seam formed between the upper end of the rolled material protection board and the inner wall surface of the parapet. The first woven mesh partially covers the inward side of the rolled material protection board and the inner wall surface of the parapet, and the inner wall mortar surface layer covers the first woven mesh.

5. A roof parapet flashing structure according to claim 4, characterized in that: The first woven mesh is respectively connected to the coiled material protection plate, the inner wall surface of the parapet and the anchor nails.

6. A roof parapet flashing structure according to claim 4, characterized in that: There are a number of rolled material protection plates arranged along the length direction of the parapet, a second woven mesh is vertically laid at the vertical seam formed by two adjacent rolled material protection plates, the second woven mesh partially covers the inward side of the two rolled material protection plates and is fixedly connected, and the inner wall mortar surface layer covers the second woven mesh.

7. A roof parapet flashing structure according to claim 6, characterized in that: The intersection of the bottom surface of the accommodating groove and the roof panel has an arc transition surface, and the waterproof coiled material covers the arc transition surface to form a coiled material end in the accommodating groove; on the inward side of the building block, a roof insulation board is also provided between the rigid protective layer and the waterproof coiled material.

8. A roof parapet flashing structure according to claim 7, characterized in that: The outer wall surface of the parapet is paved with an outer wall insulation board, and the top surface of the parapet is paved with a capping board. A third adhesive layer is arranged between the capping board and the top surface of the parapet. The capping board extends outward and covers the upper end of the outer wall insulation board. The capping board and the outer wall insulation board are respectively covered with a top mortar surface layer and an outer mortar surface layer; a third woven mesh is paved on the capping board. The third woven mesh extends downward from the outer edge of the capping board and partially covers the outer side surface of the outer wall insulation board. The top mortar surface layer and the outer mortar surface layer are respectively covered with the third woven mesh.

9. A roof parapet flashing structure according to claim 8, characterized in that: The top plate is divided into several platen sections along the length direction of the parapet. The end faces of the platen sections in the length direction of the parapet are raised to form joint parts. The two joint parts at the opposite ends of two adjacent platen sections are vertically overlapped and bonded, and the overlapping surfaces are matching inclined surfaces.

10. A construction method for a roof parapet flashing structure according to any one of claims 7 to 9, characterized in that: The steps include: 1) A groove extending to the roof panel is reserved on the inner wall of the parapet, and mortar is applied at the intersection of the bottom of the groove and the roof panel to form an arc transition surface; 2) Lay the waterproofing membrane on the roof panel, and make the waterproofing membrane cover the arc transition surface and form the membrane end in the receiving groove, and spread the mortar between the bottom surface of the receiving groove and the membrane end to form the first bonding layer; 3) Fill the mortar in the receiving groove and level it above the waterproof membrane at the arc transition surface, spread the mortar on one side of the membrane protection plate and paste it on the membrane end, adjust the verticality of the membrane protection plate, and make the inner side of the membrane protection plate flush with the inner wall surface of the parapet, and the mortar on the inner side of the membrane end forms the second bonding layer; 4) Anchors are installed through the upper end of the membrane protection plate to connect it to the parapet, and a layer of blocks is laid on the waterproof membrane so that the blocks are in contact with the inner side of the membrane protection plate; 5) Lay the roof insulation board on the area of ​​the roof panel except the blocks, and cast on the roof insulation board and blocks to form a rigid protective layer; 6) Lay the first woven mesh at the horizontal joint formed by the upper end of the roll material protection board and the inner wall surface of the parapet, and lay the second woven mesh at the vertical joint formed by two adjacent roll material protection boards. Plaster the inner side of the roll material protection board and the inner wall surface of the parapet to form the inner wall mortar surface layer.

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