Roof flashing structure and prefabricated flashing structure

Abstract

The utility model relates to a roof flashing structure which comprises a roof and a parapet wall perpendicular to the roof, a prefabricated flashing structure with an L-shaped cross section is laid at the position of the flashing structure where the roof and the parapet wall intersect, and the prefabricated flashing structure comprises a top olecranon end, a bottom olecranon end and a top olecranon end, the top olecranon end is connected and combined with the inner side of the parapet wall so as to cut off water flow flowing down from the inner side of the parapet wall; the arc-shaped water flowing surface is positioned below the top olecranon end and is used for receiving the water flow cut off and collected by the top olecranon end and collecting the flowing water to a drainage ditch arranged on the roof; the back concave-convex combination surface is adhered to the parapet wall; the bottom concave-convex combination surface is adhered to the roof; the bottom connecting end is formed at the bottom of the prefabricated flashing structure in a bending forming mode and connected with the bottom concave-convex combination face. The roof flashing structure can solve the problem of roof leakage caused by hollowing, cracking, falling and loosening of the flashing structure, and the roof construction quality is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a roof flashing structure and a prefabricated flashing structure. Background Art

[0002] In the prior art, most of the traditional cement mortar plastering flashing construction is carried out by workers directly in accordance with the rough sample form. Due to the special structure, it is difficult to form a unified standard for the traditional cement mortar plastering flashing construction and the difficulty is high. The construction process is greatly affected by the environment, the maintenance requirements are also high, and the construction quality is greatly affected by the construction level and quality of the workers. The flashing structure is usually constructed on the waterproof layer or the insulation layer. Due to the difference in the material properties of the two, the flashing structure layer is very easy to form hollows and cracks inside. After the construction is completed, the traditional mortar plastering flashing structure cannot adapt to the roof environment exposed to the outdoors all year round, and there are common problems of cracking, hollowing, and falling off, which leads to the exposure and damage of the waterproof layer under the roof flashing, causing difficult quality maintenance problems of roof leakage. The existing prefabricated flashing structure is either difficult to construct due to the too smooth joint surface of the prefabricated structure, which is very easy to fall off during the paving process, or needs to be fixed by bolts, steel sheets, etc., resulting in a large increase in cost, and some of them do not fully consider the coordination of the waterproof structure. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a roof flashing structure and a prefabricated flashing structure to solve the problem of hollowing, cracking, falling off and loosening of the flashing structure, which leads to roof leakage.

[0004] The technical solution of the utility model is a roof flashing structure, comprising a roof and a parapet vertically arranged with the roof, a prefabricated flashing structure with an L-shaped cross section is paved at the flashing structure position where the roof intersects with the parapet, and the prefabricated flashing structure comprises:

[0005] The top hawk beak end is constructed to be inclined toward the roof, and the top hawk beak end is connected and combined with the inner side of the parapet to intercept the water flowing down from the inner side of the parapet;

[0006] The arc-shaped water flow surface is located below the top hawk beak end, and is used to receive the water flow intercepted and collected by the top hawk beak end, and collect the water to the drainage ditch arranged on the roof;

[0007] The concave-convex joint surface on the back is adhered to the parapet;

[0008] The bottom concave-convex joint surface is adhered to the roof;

[0009] The bottom connecting end is formed at the bottom of the prefabricated flashing structure by bending and is connected with the concave-convex joint surface of the bottom.

[0010] Preferably, the roof comprises a roof structure plate, a first waterproof layer, an insulation layer, an isolation layer and a concrete layer which are arranged in sequence from bottom to top in the vertical direction; the bottom concave-convex bonding surface is bonded to the concrete layer by plain cement slurry; waterproof glue is embedded between the bottom connecting end and the concrete layer to form a second waterproof layer; and the drainage ditch is arranged on the concrete layer and is located on the outside of the bottom connecting end.

[0011] Preferably, the parapet includes a parapet structural board, a mortar plaster layer and a third waterproof layer, the mortar plaster layer is laid on the outside of the parapet structural board and the bottom end face abuts against the upper surface of the top hawk's beak end; the third waterproof layer is arranged between the parapet structural board and the back concave-convex joint surface and is connected to the first waterproof layer, and the back concave-convex joint surface is bonded to the third waterproof layer by plain cement slurry or weather-resistant glue.

[0012] Preferably, the third waterproof layer is formed by laying a waterproof membrane, one end of which is fixed in a groove arranged on the parapet structural board near the top eagle beak end by a cement steel nail, and the other end extends downward along the parapet structural board, and extends outward in a horizontal direction after passing through the intersection of the parapet structural board and the roof structural board to form the first waterproof layer.

[0013] Preferably, a first additional waterproof layer is provided between the first waterproof layer and the roof structure board, and the first additional waterproof layer extends outwardly from the intersection of the parapet structure board and the roof structure board in the horizontal direction by a length h1≧250mm.

[0014] Preferably, a second additional waterproof layer is provided between the third waterproof layer and the parapet structural board, and the second additional waterproof layer extends upward in the vertical direction from the intersection of the parapet structural board and the roof structural board by a length h2≧250mm, and the second additional waterproof layer is connected to the first additional waterproof layer.

[0015] Preferably, a gap is formed between the third waterproof layer and the concrete layer, and the gap is filled with polyurethane sealant.

[0016] Preferably, a transition fillet is provided at the intersection of the parapet wall structural panel and the roof structural panel.

[0017] Another technical solution of the utility model is a prefabricated flashing structure, which is applied to the roof flashing structure as described above. The cross section of the prefabricated flashing structure is L-shaped, and includes:

[0018] The top hawk's beak end is constructed to be inclined toward the roof;

[0019] The arc-shaped water flow surface is located below the top hawk beak end, and is used to receive and drain the water flow intercepted and collected by the top hawk beak end, and collect the water to the drainage ditch arranged on the roof;

[0020] The concave and convex joint surface on the back is used for bonding with the parapet;

[0021] The concave and convex bonding surface at the bottom is used for bonding with the roof;

[0022] The bottom connecting end is formed at the bottom of the prefabricated flashing structure by bending and is connected with the concave-convex joint surface of the bottom.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] ⑴ The roof flashing structure provided by the utility model can enhance the bonding and waterproofness of the roof waterproof structure, avoid the problem of hollowing, cracking, falling off and loosening of the flashing structure, which may lead to roof leakage, effectively improve the quality of roof construction, and reduce repair and maintenance costs;

[0025] (2) The use of prefabricated flashing structures is conducive to the standardized and assembled construction of roof flashing, which reduces the difficulty of flashing construction, speeds up the construction speed, and improves the overall appearance quality of the roof;

[0026] ⑶ By using concave and convex shapes on the back and bottom of the prefabricated flashing structure, the adhesion between the prefabricated flashing structure and the parapet and roof is increased. The concave and convex bonding surface at the bottom also increases the friction of horizontal movement, further plays a role in positioning and fixing, and ensures the stability of the flashing structure during the period from paving to the formation of strength of the bonding layer;

[0027] (4) The bottom connection end of the prefabricated flashing structure is bent and formed, which is beneficial to extend the leakage path and improve the waterproof effectiveness of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the roof flashing structure of the utility model;

[0029] Figure 2 yes Figure 1 A partial enlarged view of the middle part;

[0030] Figure 3 It is a structural schematic diagram of the prefabricated flashing structure of the utility model;

[0031] Figure 4 It is a three-dimensional schematic diagram of the prefabricated flashing structure of the utility model;

[0032] Figure 5 yes Figure 4 Schematic diagram from another angle.

[0033] Main component symbols:

[0034] Roof 1; roof structure board 11; first waterproof layer 12; thermal insulation layer 13; isolation layer 14; concrete layer 15; drainage ditch 151; second waterproof layer 16; first additional waterproof layer 17;

[0035] Parapet 2; parapet structural board 21; groove 211; mortar plaster layer 22; third waterproof layer 23; second additional waterproof layer 24;

[0036] Prefabricated flashing structure 3; top eagle beak end 31; arc-shaped water flow surface 32; back concave-convex joint surface 33; bottom concave-convex joint surface 34; bottom connection end 35;

[0037] Cement steel nails 4;

[0038] Rounded corners 5;

[0039] Gap 6. DETAILED DESCRIPTION

[0040] The utility model will be further described below in conjunction with the accompanying drawings:

[0041] See also Figures 1 to 5 As shown, the utility model provides a roof flashing structure, comprising a roof 1 and a parapet 2 vertically arranged with the roof 1, and a prefabricated flashing structure 3 with an L-shaped cross section is paved at the flashing structure position where the roof 1 and the parapet 2 intersect. Figures 3 to 5As shown, the prefabricated flashing structure 3 includes a top beak end 31, an arc-shaped water flow surface 32, a back concave-convex joint surface 33, a bottom concave-convex joint surface 34 and a bottom connecting end 35; wherein the top beak end 31 is constructed to be inclined toward the roof 1, and the top beak end 31 is connected and combined with the inner side of the parapet 2 to intercept the water flowing down from the inner side of the parapet 2; the arc-shaped water flow surface 32 is located below the top beak end 31, and is used to receive the water flow intercepted by the top beak end 31, slow down the flow rate and impact force of the water flow, and collect the water to the drainage ditch 151 set on the roof 1, and drain it away by the overall organization of the roof; the back concave-convex joint surface 33 is connected to the parapet 2 through plain cement slurry or weather-resistant glue. Adhesion; the bottom concave-convex joint surface 34 is adhered to the roof 1 by plain cement slurry; by adopting concave-convex shapes on the back and bottom surfaces of the prefabricated flashing structure 3, the adhesion between the prefabricated flashing structure 3 and the parapet 2 and the roof 1 is increased, and the bottom concave-convex joint surface 34 also increases the horizontal movement friction, and further plays a role in positioning and fixing, ensuring the stability of the flashing structure during the period from paving to the bonding layer forming strength; the bottom connecting end 35 is formed at the bottom of the prefabricated flashing structure 3 by a bending molding method and is connected to the bottom concave-convex joint surface 34. The bottom connecting end 35 is processed by bending and molding, which is conducive to extending the leakage path and improving the waterproof effectiveness of the connection between the bottom connecting end 35 and the roof 1.

[0042] It is worth mentioning that during the roof waterproofing construction stage, multiple polymer plastic molding molds are used to cast and manufacture prefabricated flashing PC components. After the flashing structure forms 75% strength, the mold is opened to take out the prefabricated flashing structure, and sufficient prefabricated flashing structures are repeatedly manufactured and laid at the flashing structure position where the bottom of the parapet and the roof panel intersect. This is conducive to the standardized and assembled construction of roof flashing, reduces the difficulty of flashing construction, and speeds up construction.

[0043] The roof flashing structure provided by the utility model adopts a prefabricated flashing structure 3, and utilizes the top hawk beak end 31 to collect water flowing down from the top of the parapet. The arc-shaped water flow surface 32 receives the water to slow down the flow rate and impact force, and collects the water to the drainage ditch 151 set on the roof 1, and is discharged by the overall roof organization; the back concave-convex bonding surface 33 is conducive to enhancing adhesion and tight bonding, the bottom concave-convex bonding surface 34 is conducive to tight bonding with the roof and increasing horizontal movement friction, and the bottom connecting end 35 is sealed with weather-resistant waterproof glue to form a complete roof flashing structure, which can effectively avoid the quality problem of hollowing, cracking, falling off and loosening of the flashing structure layer, which may cause the waterproof layer to be torn, exposed to the outside or even damaged, thereby causing leakage.

[0044] See also Figure 1 to Figure 2As shown, the roof 1 includes a roof structure board 11, a first waterproof layer 12, an insulation layer 13, an isolation layer 14 and a concrete layer 15 which are arranged in sequence from bottom to top in the vertical direction. The bottom concave-convex bonding surface 34 is adhered to the concrete layer 15 by plain cement slurry. Waterproof glue is embedded between the bottom connecting end 35 and the concrete layer 15 to form a second waterproof layer 16. The drainage ditch 151 is arranged on the concrete layer 15 and is located on the outside of the bottom connecting end 35.

[0045] Specifically, in this embodiment, the roof 1 includes a roof concrete structural board 11, a first waterproof layer 12, a 100 mm thick extruded polystyrene foam board insulation layer 13, a polyester non-woven fabric isolation layer 14, and a 100 mm thick reinforced fine stone concrete layer 15, which are arranged in sequence from bottom to top in the vertical direction. The bottom concave-convex joint surface 34 is adhered to the concrete layer 15 by plain cement slurry, and a weather-resistant waterproof glue is embedded between the bottom connection end 35 and the concrete layer 15 to form a second waterproof layer 16. The drainage ditch 151 is arranged on the concrete layer 15 and is located outside the bottom connection end 35 to drain the water collected by the arc-shaped water flow surface 32.

[0046] See also Figure 1 As shown, the parapet 2 includes a parapet structural plate 21, a mortar plaster layer 22 and a third waterproof layer 23. The mortar plaster layer 22 is laid on the outer side of the parapet structural plate 21 and the bottom end face abuts against the upper surface of the top eagle beak end 31; the third waterproof layer 23 is arranged between the parapet structural plate 21 and the back concave-convex joint surface 33 and is connected to the first waterproof layer 12, and the back concave-convex joint surface 33 is adhered to the third waterproof layer 23 by plain cement slurry or weather-resistant glue.

[0047] Specifically, the third waterproof layer 23 is formed by laying a waterproof membrane, one end of which is fixed in a groove 211 arranged on the parapet structural plate 21 near the top eagle beak end 11 by a cement steel nail 4 to prevent the waterproof membrane from slipping; the other end of the waterproof membrane extends downward along the parapet structural plate 21, and extends outward in a horizontal direction after passing through the intersection of the parapet structural plate 21 and the roof structural plate 11 to form a first waterproof layer 12.

[0048] It is worth noting that a transition fillet 5 is provided at the intersection of the parapet 2 and the roof 1 . The radius R of the fillet 5 is 50 mm and is formed by cement mortar construction. The fillet 5 is provided to facilitate the laying of the waterproof membrane at the intersection of the parapet 2 and the roof 1 .

[0049] For further information, see Figure 1 As shown, a first additional waterproof layer 17 is provided between the first waterproof layer 12 and the roof structure board 11. The first additional waterproof layer 17 extends horizontally outward from the intersection of the parapet structure board 21 and the roof structure board 11 to a length h 1≧250mm; a second additional waterproof layer 24 is provided between the third waterproof layer 23 and the parapet structural plate 21, and the second additional waterproof layer 24 extends vertically upward from the intersection of the parapet structural plate 21 and the roof structural plate 11 to a length h 2 ≧250mm; the second additional waterproof layer 24 is connected to the first additional waterproof layer 17.

[0050] See also Figure 1 As shown, a gap 6 is formed between the third waterproof layer 23 and the concrete layer 15, and the gap 6 is filled with a 30 mm wide single-component polyurethane sealant to prevent the rigid concrete layer 15 from cracking the waterproof layer due to thermal expansion and contraction.

[0051] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A roof flashing structure, comprising a roof and a parapet vertically arranged to the roof, characterized in that: A prefabricated flashing structure with an L-shaped cross section is paved at the flashing structure position where the roof intersects the parapet, and the prefabricated flashing structure includes: The top hawk beak end is constructed to be inclined toward the roof, and the top hawk beak end is connected and combined with the inner side of the parapet to intercept the water flowing down from the inner side of the parapet; The arc-shaped water flow surface is located below the top hawk beak end, and is used to receive the water flow intercepted and collected by the top hawk beak end, and collect the water to the drainage ditch arranged on the roof; The concave-convex joint surface on the back is adhered to the parapet; The bottom concave-convex joint surface is adhered to the roof; The bottom connecting end is formed at the bottom of the prefabricated flashing structure by bending and is connected with the concave-convex joint surface of the bottom.

2. The roof flashing structure according to claim 1, characterized in that: The roof includes a roof structure plate, a first waterproof layer, an insulation layer, an isolation layer and a concrete layer arranged in sequence from bottom to top in the vertical direction; the bottom concave-convex bonding surface is adhered to the concrete layer by plain cement slurry; waterproof glue is embedded between the bottom connecting end and the concrete layer to form a second waterproof layer; the drainage ditch is arranged on the concrete layer and is located on the outside of the bottom connecting end.

3. The roof flashing structure according to claim 2, characterized in that: The parapet includes a parapet structural board, a mortar plaster layer and a third waterproof layer. The mortar plaster layer is laid on the outer side of the parapet structural board and the bottom end face abuts against the upper surface of the top hawk's beak end; the third waterproof layer is arranged between the parapet structural board and the back concave-convex joint surface and is connected to the first waterproof layer. The back concave-convex joint surface is bonded to the third waterproof layer by plain cement slurry or weather-resistant glue.

4. The roof flashing structure according to claim 3, characterized in that: The third waterproof layer is formed by laying a waterproof membrane, one end of which is fixed in a groove arranged on the parapet structural board near the top eagle beak end by a cement steel nail, and the other end extends downward along the parapet structural board, and extends outward in a horizontal direction after passing through the intersection of the parapet structural board and the roof structural board to form the first waterproof layer.

5. The roof flashing structure according to claim 3, characterized in that: A first additional waterproof layer is provided between the first waterproof layer and the roof structure board. The first additional waterproof layer extends outwardly in a horizontal direction from the intersection of the parapet structure board and the roof structure board by a length h1≧250mm.

6. The roof flashing structure according to claim 5, characterized in that: A second additional waterproof layer is provided between the third waterproof layer and the parapet structural board. The second additional waterproof layer extends upward in the vertical direction from the intersection of the parapet structural board and the roof structural board with a length h2≧250mm. The second additional waterproof layer is connected to the first additional waterproof layer.

7. The roof flashing structure according to claim 3, characterized in that: A gap is formed between the third waterproof layer and the concrete layer, and the gap is filled with polyurethane sealant.

8. The roof flashing structure according to claim 3, characterized in that: A transition fillet is provided at the intersection of the parapet structural plate and the roof structural plate.

9. A prefabricated flashing structure, used for the roof flashing structure according to any one of claims 1 to 8, characterized in that: The cross section of the prefabricated flashing structure is L-shaped, and comprises: The top hawk's beak end is constructed to be inclined toward the roof; The arc-shaped water flow surface is located below the top hawk beak end, and is used to receive and drain the water flow intercepted and collected by the top hawk beak end, and collect the water to the drainage ditch arranged on the roof; The concave and convex joint surface on the back is used for bonding with the parapet; The concave and convex bonding surface at the bottom is used for bonding with the roof; The bottom connecting end is formed at the bottom of the prefabricated flashing structure by bending and is connected with the concave-convex joint surface of the bottom.

Images