Exterior walls of buildings and buildings

Abstract

To provide an exterior wall of a building and a building that can suppress the amount of rainwater that penetrates into the interior of an overhanging section. [Solution] The exterior wall 7 comprises an exterior wall body 8, a first exterior wall panel 13, a second exterior wall panel 14, a water-draining member 30 positioned between the first exterior wall panel 13 and the second exterior wall panel 14, and a drainage guide member 40. The drainage guide member 40 is provided within the range where the overhang portion 3 is provided in the exterior wall 7 and is connected to the water-draining member 30. The upper end 14A of the second exterior wall panel 14 is located above the floor surface 3A of the overhang portion 3. An open end 16 connected to a first gap SA is formed between the lower end 13A of the first exterior wall panel 13 and the upper end 14A of the second exterior wall panel 14. The water-draining member 30 is positioned so as to separate the first gap SA and the second gap SB without closing the open end 16. The drainage guide member 40 is configured to extend from the open end 16 to the overhang portion 3.

Description

Technical Field

[0001] This disclosure relates to the outer wall of a building and the building.

Background Art

[0002] In a building, in order to improve the air permeability of the outer wall, a ventilation gap may be provided in the outer wall. For example, in Patent Document 1, a ventilation gap is provided between the outer wall main body and the outer wall panel. Further, in the same document, a drainage member is arranged between the upper and lower outer wall panels located at the boundary of the floor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a building where a drainage member is arranged at the boundary of the floor, an overhang may be provided. Examples of the overhang include a veranda, a balcony, etc. In this case, a gap is provided between the overhang and the outer wall. Then, the rainwater discharged from the drainage member arranged at the boundary of the floor passes through the gap between the overhang and the outer wall and flows down along the outer surface of the outer wall.

[0005] By the way, when there is heavy rain, the amount of rainwater discharged from the drainage member increases. Then, a part of the rainwater passing through the gap between the overhang and the outer wall may intrude into the inside of the overhang.

Means for Solving the Problems

[0006] (1) The outer wall of the building that solves the above problems has an overhang Equipped withAn exterior wall comprising: an exterior wall body; a first exterior wall panel positioned with a first gap between it and the outer surface of the exterior wall body; a second exterior wall panel positioned below the first exterior wall panel and positioned with a second gap between it and the outer surface of the exterior wall body; a water-draining member positioned between the first exterior wall panel and the second exterior wall panel; and a drainage guide member provided within the range in which the overhang portion is provided on the exterior wall and connected to the water-draining member, wherein the upper end of the second exterior wall panel is positioned above the floor surface of the overhang portion, an open end connected to the first gap is formed between the lower end of the first exterior wall panel and the upper end of the second exterior wall panel, the water-draining member is positioned so as to separate the first gap and the second gap without closing the open end, and the drainage guide member is configured to extend from the open end to the overhang portion.

[0007] With this configuration, rainwater that enters the first gap between the exterior wall body and the first exterior wall panel can be guided to the overhang. This reduces the amount of rainwater that passes through the gap between the overhang and the second exterior wall panel. As a result, the amount of rainwater that enters the interior of the overhang can be reduced.

[0008] (2) In the exterior wall described in (1) above, the flashing member comprises an upper portion, an intermediate portion connected to the upper portion, and a lower portion extending downward from the intermediate portion, wherein the upper portion of the flashing member is arranged along the outer surface of the exterior wall body in the first gap, the intermediate portion of the flashing member is arranged to close the second gap, and the lower portion of the flashing member is arranged along the outer surface of the second exterior wall panel.

[0009] This configuration prevents rainwater from entering the second gap between the main exterior wall and the second exterior wall panel. This prevents water from accumulating on the various gap fillers that seal the second gap in the exterior wall. Gap fillers are building components that are installed to partially seal the second gap. Examples of gap fillers include opening frames for windows, ventilation openings for ventilation, furring strips for attaching exterior wall panels, and brackets that extend from the building structure to the outside of the exterior wall.

[0010] (3) In the exterior wall described in (2) above, the direction from the exterior wall body toward the overhang is defined as the first direction in a plan view, and the intermediate portion of the flashing member is inclined downward in the first direction.

[0011] If the intermediate portion of the water drainage member is configured to extend horizontally, there is a risk that some rainwater may remain in the intermediate portion after it rains. In this case, the rainwater that accumulates in the intermediate portion can cause mold to grow. With the above configuration, however, it is possible to suppress the accumulation of rainwater in the intermediate portion of the water drainage member.

[0012] (4) In the exterior wall described in (2) above, the direction from the exterior wall body toward the overhang is defined as the first direction in a plan view, and the drainage guide member has an upper guide portion and a lower guide portion connected to the upper guide portion, the upper guide portion of the drainage guide member is inclined at a first inclination angle along the intermediate portion of the water-cutting member, and the lower guide portion of the drainage guide member is inclined downward in the first direction at a second inclination angle greater than the first inclination angle.

[0013] This configuration allows for a smaller width of the drainage guide member in a plan view compared to a case where the drainage guide member is configured to tilt at a first inclination angle without being bent. This makes the drainage guide member less conspicuous.

[0014] (5) In the exterior wall described in any one of (1) to (4) above, the lower end of the drainage guide member does not come into contact with the floor surface of the overhang.

[0015] When the lower end of the drainage guide member comes into contact with the protruding portion, there is a risk that debris may accumulate at the contact point between the lower end of the drainage guide member and the protruding portion. In this regard, the above configuration can suppress such debris accumulation.

[0016] (6) In the outer wall according to any one of (1) to (5) above, the drainage guide member is composed of a waterproof iron plate. According to this configuration, the drainage guide member is easy to process. Therefore, the productivity of the drainage guide member can be improved.

[0017] (7) In the outer wall according to any one of (1) to (6) above, the overhanging portion is configured as a balcony or a veranda provided with a waterproof pan and a floor material, and the floor material is disposed within the waterproof pan.

[0018] According to this configuration, rainwater that has entered the first gap between the outer wall main body and the first outer wall panel can be guided to the waterproof pan. As a result, it is possible to suppress water from entering a portion that is not covered by the waterproof pan on the balcony or veranda.

[0019] (8) A building for solving the problem, having an outer wall according to any one of (1) to (7) above ru. According to this configuration, the amount of rainwater entering the interior of the overhanging portion can be suppressed.

Effect of the Invention

[0020] According to the outer wall of the building and the building of the present disclosure, the amount of rainwater entering the interior of the overhanging portion can be suppressed.

Brief Description of the Drawings

[0021] [Figure 1] It is a schematic diagram of a building according to an embodiment. [Figure 2] It is an exploded perspective view of an overhanging portion of a building according to an embodiment. [Figure 3] It is a cross-sectional view of an outer wall provided with an overhanging portion of a building according to an embodiment. [Figure 4] It is a cross-sectional view of an outer wall provided with an overhanging portion of a building of a reference example.

Mode for Carrying Out the Invention

[0022] Referring to Figures 1 to 4, the exterior wall 7 of Building 1 and Building 1 of this embodiment will be described. In this embodiment, Building 1 is a two-story building. The first floor is the floor closest to the ground.

[0023] As shown in Figure 1, the building 1 comprises a building body 2 and an overhang 3 provided on the building body 2. The building body 2 has an exterior wall 7. The exterior wall 7 separates the interior from the exterior. The overhang 3 is provided on the exterior wall 7 so as to project outward from the exterior wall 7. The overhang 3 is provided at a position higher than the first floor.

[0024] The overhang 3 is configured to allow people to enter and exit. Specifically, the overhang 3 is configured as a balcony or veranda. The overhang 3 may also be the roof of an entrance porch. The overhang 3 may also be the roof of a deck.

[0025] The overhang 3 is provided on the second floor or higher. In this embodiment, the overhang 3 is provided at the same height as the second floor. The overhang 3 can be accessed from the second floor. The floor surface 3A of the overhang 3 is provided at substantially the same height as the floor surface of the second floor. The floor surface 3A of the overhang 3 is composed of the floor surface 25A of the floor material 25 of the overhang 3.

[0026] In the main building structure 2, a floor boundary line L is provided between floors in the exterior wall 7. The floor boundary line L is set slightly higher than the floor surface 3A of the overhang 3. At the floor boundary line L, the ventilation gaps S provided in the exterior wall 7 are separated vertically. That is, the ventilation gaps S in the exterior wall 7 above the floor boundary line L do not communicate with the ventilation gaps S below the floor boundary line L.

[0027] As shown in Figure 2, the overhang 3 is equipped with a frame 21. The frame 21 includes a rectangular frame structure 22. The frame structure 22 is provided with a plurality of reinforcing members 23. The frame 21 is made of steel. The frame 21 is fixed to brackets (not shown) extending from the main structure of the building 2.

[0028] As shown in Figure 3, the frame 21 is positioned so as not to come into contact with the second exterior wall panel 14, which will be described later. Specifically, a gap (hereinafter referred to as the frame gap SC1) is provided between the end of the frame 21 on the building body 2 side and the second exterior wall panel 14, through which rainwater R can pass.

[0029] As shown in Figure 2, the overhang 3 further comprises a waterproof pan 24 and flooring material 25. The waterproof pan 24 is box-shaped. The waterproof pan 24 comprises a bottom surface 24A and an edge 24B that rises along the edge of the bottom surface 24A. The waterproof pan 24 is placed on top of a waterproof pan base material 24D. The waterproof pan base material 24D is laid on top of the frame 21. The waterproof pan 24 is provided with a drain 24C. The waterproof pan 24 is positioned so as not to come into contact with the second exterior wall panel 14, which will be described later. Specifically, a gap (hereinafter referred to as the waterproof pan gap SC2) is provided between the edge 24B on the building body 2 side of the waterproof pan 24 and the second exterior wall panel 14, through which rainwater R can pass (see Figure 3).

[0030] The flooring material 25 is placed on top of the waterproof pan 24. In a plan view, the flooring material 25 is placed inside the waterproof pan 24. Specifically, the edges of the flooring material 25 are positioned inward from the edges of the waterproof pan 24. Therefore, rainwater R flowing onto the floor surface 25A of the flooring material 25 is received by the waterproof pan 24.

[0031] The overhang 3 further includes a drain pipe 26. The drain pipe 26 is located inside the overhang 3. The inside of the overhang 3 is the area between the floor material 25 and the ceiling material 29. One first open end 26A of the drain pipe 26 is connected to the drain outlet 24C of the waterproof pan 24. The other second open end (not shown) of the drain pipe 26 is connected to the drainage system of the building body 2.

[0032] As shown in Figure 2, the overhang 3 is further equipped with a back ceiling material 29. The back ceiling material 29 is attached to the frame 21 so as to cover the lower side of the frame 21. The back ceiling material 29 is positioned so as not to come into contact with the second exterior wall panel 14. Specifically, a gap (hereinafter referred to as the back ceiling material gap SC3) is provided between the edge of the back ceiling material 29 on the building body 2 side and the second exterior wall panel 14, through which rainwater R can pass (see Figure 3).

[0033] The overhang portion 3 is positioned so as not to come into contact with the second exterior wall panel 14. Specifically, a gap (hereinafter referred to as the overhang gap SC) is provided between the edge of the overhang portion 3 on the building body 2 side and the second exterior wall panel 14, through which rainwater R can pass. The overhang gap SC is composed of a frame gap SC1, a waterproof pan gap SC2, and a back ceiling material gap SC3.

[0034] As shown in Figure 1, the overhang 3 is further equipped with a handrail 27. The handrail 27 is attached to the frame 22.

[0035] [outer wall] As shown in Figure 3, the exterior wall 7 comprises an exterior wall body 8 and an exterior wall panel 12. In this embodiment, the direction from the exterior wall body 8 toward the overhang 3 in a plan view is defined as the first direction D1. In the overhang 3, the direction that intersects the first direction D1 and also intersects the vertical direction D3 is defined as the second direction D2.

[0036] The exterior wall body 8 comprises an outer base material 10 fixed to the beam 9 and an inner base material (not shown) also fixed to the beam 9. A waterproof sheet (not shown) is attached to the outer surface of the outer base material 10. The outer surface 8A of the exterior wall body 8 shows the outer surface of the waterproof sheet. The exterior wall panel 12 is positioned with a ventilation gap S between it and the outer surface 8A of the exterior wall body 8.

[0037] The exterior wall 7 comprises a first exterior wall panel 13, which serves as an exterior wall panel 12, and a second exterior wall panel 14, which also serves as an exterior wall panel 12.

[0038] The first exterior wall panel 13 is an exterior wall panel 12 located directly above the floor boundary line L. The first exterior wall panel 13 is positioned in the first direction D1 with a first gap SA between it and the outer surface 8A of the exterior wall body 8.

[0039] The second exterior wall panel 14 is an exterior wall panel 12 located directly below the floor boundary line L. That is, the second exterior wall panel 14 is located below the first exterior wall panel 13. The second exterior wall panel 14 is adjacent to the first exterior wall panel 13 in the vertical direction D3 via an open end 16. The second exterior wall panel 14 is positioned with a second gap SB between it and the outer surface 8A of the exterior wall body 8 in the first direction D1. The upper end 14A of the second exterior wall panel 14 is located above the floor surface 3A of the overhang 3.

[0040] An open end 16 is formed between the lower end 13A of the first exterior wall panel 13 and the upper end 14A of the second exterior wall panel 14, connecting to the first gap SA. The open end 16 connects to the ventilation gap S of the exterior wall 7 above the floor boundary line L.

[0041] [Water drainage component] The water-draining member 30 is positioned along the floor boundary line L. The water-draining member 30 separates the ventilation gap S of the exterior wall 7 above the floor boundary line L from the ventilation gap S of the exterior wall 7 below the floor boundary line L. The water-draining member 30 guides rainwater R that enters the ventilation gap S inside the exterior wall panel 12 positioned above the floor boundary line L to the outside of the exterior wall panel 12. In addition, the water-draining member 30 prevents rainwater R from entering the ventilation gap S inside the exterior wall panel 12 positioned below the floor boundary line L from near the floor boundary line L.

[0042] Referring to Figure 3, the specific configuration of the water-draining member 30 will be described. In the overhang 3, the water-draining member 30 extends in the second direction D2. The water-draining member 30 is positioned between the first exterior wall panel 13 and the second exterior wall panel 14. The water-draining member 30 is positioned so as to separate the first gap SA and the second gap SB, with its open end 16 not being closed.

[0043] The water drain member 30 is made of a waterproof steel plate. The water drain member 30 may also be made of resin.

[0044] The drain member 30 comprises an upper portion 31 extending in the vertical direction D3, an intermediate portion 32 connected to the lower end of the upper portion 31 and extending in the first direction D1, and a lower portion 33 extending downward in the first direction D1 from the end of the intermediate portion 32 opposite to the end connected to the upper portion 31.

[0045] The upper portion 31 of the water-draining member 30 is positioned in the first gap SA between the first exterior wall panel 13 and the exterior wall body 8. The upper portion 31 of the water-draining member 30 is positioned along the outer surface 8A of the exterior wall body 8 in the first gap SA. A ventilation gap S is provided between the upper portion 31 of the water-draining member 30 and the inner surface 13B of the first exterior wall panel 13, through which rainwater R can pass.

[0046] The intermediate portion 32 of the water-draining member 30 is positioned to close the second gap SB. The intermediate portion 32 is positioned to contact the upper surface of the second exterior wall panel 14. The intermediate portion 32 of the water-draining member 30 is inclined downward in the first direction D1.

[0047] A buffer member 35 may be placed between the intermediate portion 32 and the upper surface of the second outer wall panel 14. The upper surface of the buffer member 35 is inclined downward in the first direction D1. The inclination angle of the upper surface of the buffer member 35 is equal to the inclination angle of the intermediate portion 32. The buffer member 35 fills the gap between the intermediate portion 32 and the upper surface of the second outer wall panel 14. The buffer member 35 is made of resin or wood.

[0048] The lower portion 33 of the water drain member 30 is positioned to follow the outer surface 14B of the second exterior wall panel 14. The lower portion 33 of the water drain member 30 is positioned away from the edge 24B of the waterproof pan 24 of the overhang 3. The aforementioned waterproof pan gap SC2 is provided between the lower portion 33 of the water drain member 30 and the edge 24B of the waterproof pan 24.

[0049] [Drainage guide member] The exterior wall 7 further includes a drainage guide member 40. The drainage guide member 40 is made of a waterproof steel plate. The drainage guide member 40 is provided in the exterior wall 7 within the range in which the overhang portion 3 is provided. In this embodiment, the drainage guide member 40 is configured to extend to the same length as the overhang portion 3 in the second direction D2. The drainage guide member 40 is connected to the water-cutting member 30. The drainage guide member 40 is configured to extend from the open end 16 to the overhang portion 3.

[0050] Specifically, the drainage guide member 40 is positioned to cover the gap SC2 in the waterproof pan in a plan view. Furthermore, the drainage guide member 40 spans from the intermediate portion 32 of the water-draining member 30 to the edge 24B of the waterproof pan 24 in the first direction D1. The drainage guide member 40 is positioned so as not to block the open end 16 between the first exterior wall panel 13 and the second exterior wall panel 14.

[0051] As shown in Figure 3, the drain guide member 40 has a guide upper part 41 and a guide lower part 42 connected to the guide upper part 41. The guide upper part 41 of the drain guide member 40 is inclined at a first inclination angle so as to follow the intermediate portion 32 of the drain member 30. The guide lower part 42 of the drain guide member 40 is inclined downward in the first direction D1 at a second inclination angle which is greater than the first inclination angle.

[0052] The lower end of the drainage guide member 40 does not contact the floor surface 3A of the overhang 3. In this embodiment, the lower surface of the drainage guide member 40 contacts the upper end of the edge 24B of the waterproof pan 24. In other examples, the lower surface of the drainage guide member 40 does not contact the upper end of the edge 24B of the waterproof pan 24.

[0053] [Operation of this embodiment] When it rains, some of the rainwater R enters the ventilation gap S on the inside of the exterior wall panel 12. The rainwater R that enters the ventilation gap S flows downwards. The rainwater R that enters the ventilation gap S of the exterior wall 7 above the floor boundary line L is discharged to the outside of the exterior wall panel 12 below the floor boundary line L by the flashing member 30. As a result, the flow of rainwater R that enters the ventilation gap S of the exterior wall 7 above the floor boundary line L into the ventilation gap S of the exterior wall 7 below the floor boundary line L is suppressed. This suppresses the amount of rainwater R that enters the ventilation gap S of the exterior wall 7 below the floor boundary line L.

[0054] In the portion of building 1 where an overhang 3 is provided, rainwater R that enters the ventilation gap S of the exterior wall 7 above the floor boundary line L is guided to the overhang 3 by the drainage guide member 40. By drawing the rainwater R into the overhang 3 in this way, the intrusion of rainwater R into the interior of the overhang 3 can be suppressed compared to the following reference example.

[0055] Referring to Figure 4, a reference example of a rainwater drainage structure R in the overhang 3 will be explained. In this reference example, the drainage guide member 40 is not provided in the building 1.

[0056] In the example, rainwater R that enters the ventilation gap S of the exterior wall 7 above the floor boundary line L is discharged to the outside of the exterior wall panel 12 below the floor boundary line L by the flashing member 30, just like in the parts other than the overhang 3. The rainwater R discharged to the outside of the exterior wall panel 12 flows downward through the overhang gap SC between the overhang 3 and the main building 2. Some of the rainwater R that passes through the overhang gap SC between the overhang 3 and the main building 2 flows down the bracket 5 that supports the frame 21 of the overhang 3 and enters the interior of the overhang 3. In the event of heavy rain, there is a risk that rainwater R will accumulate on the back ceiling material 29. Such accumulation of rainwater R RX can cause rust on the frame 21. Also, if the overhang 3 shakes, such as when a person enters the overhang 3, the rainwater R accumulated on the back ceiling material 29 may suddenly flow down due to the shaking. Although the rainwater R flows along the exterior wall panel 12 in this manner, it is visually undesirable to people using the building 1 or people passing by the building 1.

[0057] In this regard, according to the structure of the exterior wall 7 in this embodiment, as described above, in the portion where the overhang 3 is provided, rainwater R that enters the ventilation gap S of the exterior wall 7 above the floor boundary line L is guided to the overhang 3 by the drainage guide member 40. By drawing the rainwater R into the overhang 3 in this way, the intrusion of rainwater R into the interior of the overhang 3 can be suppressed compared to the above reference example. As a result, the accumulation of rainwater R on the back ceiling material 29 is suppressed.

[0058] [Effects of this embodiment] The effects of this embodiment will now be explained. (1) The exterior wall 7 comprises an exterior wall body 8, a first exterior wall panel 13, a second exterior wall panel 14, a water-draining member 30 positioned between the first exterior wall panel 13 and the second exterior wall panel 14, and a drainage guide member 40. The upper end 14A of the second exterior wall panel 14 is located above the floor surface 3A of the overhang 3. An open end 16 connected to a first gap SA is formed between the lower end 13A of the first exterior wall panel 13 and the upper end 14A of the second exterior wall panel 14. The drainage guide member 40 is provided in the exterior wall 7 within the range where the overhang 3 is provided and is connected to the water-draining member 30. The water-draining member 30 is positioned so as to separate the first gap SA and the second gap SB without closing the open end 16. The drainage guide member 40 is configured to extend from the open end 16 to the overhang 3.

[0059] With this configuration, rainwater R that enters the first gap SA between the exterior wall body 8 and the first exterior wall panel 13 can be guided to the overhang 3. Therefore, the amount of rainwater R passing through the overhang gap SC between the overhang 3 and the second exterior wall panel 14 can be suppressed. This suppresses the amount of rainwater R that enters the interior of the overhang 3.

[0060] (2) The upper portion 31 of the water-draining member 30 is positioned along the outer surface 8A of the outer wall body 8 in the first gap SA. The middle portion 32 of the water-draining member 30 is positioned to close the second gap SB. The lower portion 33 of the water-draining member 30 is positioned along the outer surface 14B of the second outer wall panel 14.

[0061] This configuration prevents rainwater R from entering the second gap SB between the exterior wall body 8 and the second exterior wall panel 14. This prevents water from accumulating on the various gap fillers that seal the second gap SB in the exterior wall 7. The gap fillers are components of the building 1 that are provided to partially seal the second gap SB. Examples of gap fillers include opening frames for windows, ventilation openings for ventilation, furring strips for attaching the exterior wall panels 12, and brackets that extend from the building structure to the outside of the exterior wall panels 12.

[0062] (3) The intermediate portion 32 of the water drain member 30 is inclined downward in the first direction D1. If the intermediate portion 32 of the water drain member 30 is configured to extend horizontally, there is a risk that some rainwater R will remain in the intermediate portion 32 after it rains. In this case, the rainwater R that accumulates in the intermediate portion 32 can cause mold to grow. With the above configuration, however, it is possible to suppress the accumulation of rainwater R in the intermediate portion 32 of the water drain member 30.

[0063] (4) The drain guide member 40 has a guide upper part 41 and a guide lower part 42 connected to the guide upper part 41. The guide upper part 41 of the drain guide member 40 is inclined at a first inclination angle so as to follow the intermediate part 32 of the drain member 30. The guide lower part 42 of the drain guide member 40 is inclined downward in the first direction D1 at a second inclination angle which is greater than the first inclination angle.

[0064] With this configuration, the width of the drainage guide member 40 in a plan view can be reduced compared to the case where the drainage guide member 40 is configured to tilt at a first inclination angle without being bent. This makes the drainage guide member 40 less conspicuous.

[0065] (5) The lower end of the drainage guide member 40 does not come into contact with the floor surface 3A of the protruding portion 3. If the lower end of the drainage guide member 40 comes into contact with the protruding portion 3, there is a risk that debris will accumulate at the contact point between the lower end of the drainage guide member 40 and the protruding portion 3. In this respect, the above configuration can suppress the accumulation of such debris.

[0066] (6) The drainage guide member 40 is made of waterproof steel plate. This configuration makes it easy to process the drainage guide member 40. Therefore, the productivity of the drainage guide member 40 can be improved.

[0067] (7) The overhang 3 is configured as a balcony or veranda equipped with a waterproof pan 24 and flooring material 25. The flooring material 25 is placed inside the waterproof pan 24. With this configuration, rainwater R that has entered the first gap SA between the exterior wall body 8 and the first exterior wall panel 13 can be guided to the waterproof pan 24. This prevents water from entering the part of the balcony or veranda that is not covered by the waterproof pan 24.

[0068] (8) A building 1 comprising a building body 2 having the above-mentioned exterior wall 7 and an overhang 3 provided on the building body 2. With this configuration, the amount of rainwater R that penetrates into the interior of the overhang 3 can be suppressed.

[0069] <Variation> The above embodiments are examples of possible forms of the exterior wall 7 of building 1 and building 1, and are not intended to limit their forms. The exterior wall 7 of building 1 and building 1 may take forms different from those exemplified in the above embodiments. Examples include forms in which some of the configurations of the embodiments are replaced, modified, or omitted, or forms in which new configurations are added to the embodiments. Modifications of the embodiments are shown below.

[0070] In this embodiment, the drainage guide member 40 is bent, but it may also have a curved shape.

[0071] In this embodiment, the drainage guide member 40 is bent, but it may also be configured in a flat shape. In this case as well, the effect of (1) above will be achieved.

[0072] In this embodiment, the water-draining member 30 and the drainage guide member 40 are configured separately. However, the water-draining member 30 and the drainage guide member 40 in the protruding portion 3 may be configured as a single unit.

[0073] This specification discloses the following technologies: [Note 1] Note 1 refers to the exterior wall of a building. The exterior wall of the building is an exterior wall on which an overhang is provided. The exterior wall of the building comprises an exterior wall body, a first exterior wall panel positioned with a first gap between it and the outer surface of the exterior wall body, a second exterior wall panel positioned below the first exterior wall panel and positioned with a second gap between it and the outer surface of the exterior wall body, a water-draining member positioned between the first exterior wall panel and the second exterior wall panel, and a drainage guide member. The drainage guide member is provided in the exterior wall within the range on which the overhang is provided and is connected to the water-draining member. The upper end of the second exterior wall panel is positioned above the floor surface of the overhang. An open end connected to the first gap is formed between the lower end of the first exterior wall panel and the upper end of the second exterior wall panel. The water-draining member is positioned to separate the first gap and the second gap without closing the open end. The drainage guide member is configured to extend from the open end to the protruding portion.

[0074] [Note 2] In the exterior wall of the building described in Appendix 1, the flashing member comprises an upper portion, an intermediate portion connected to the upper portion, and a lower portion extending downward from the intermediate portion. The upper portion of the flashing member is positioned along the outer surface of the exterior wall body in the first gap. The intermediate portion of the flashing member is positioned to close the second gap. The lower portion of the flashing member is positioned along the outer surface of the second exterior wall panel.

[0075] [Note 3] In the exterior wall of the building described in Appendix 2, the direction from the exterior wall body toward the overhang in a plan view is defined as the first direction. The intermediate portion of the flashing member is inclined downward in the first direction.

[0076] [Note 4] In the exterior wall of the building described in Appendix 2, the direction from the exterior wall body toward the overhang in a plan view is defined as the first direction. The drainage guide member has an upper guide portion and a lower guide portion connected to the upper guide portion. The upper guide portion of the drainage guide member is inclined at a first inclination angle so as to follow the intermediate portion of the water-cutting member. The lower guide portion of the drainage guide member is inclined downward in the first direction at a second inclination angle greater than the first inclination angle.

[0077] [Note 5] In the exterior wall of the building described in Appendix 1, the lower end of the drainage guide member does not come into contact with the floor surface of the overhang.

[0078] [Note 6] In the exterior wall of the building described in Appendix 1, the drainage guide member is made of waterproof steel plate.

[0079] [Note 7] In the exterior wall of the building described in Appendix 1, the overhang is configured as a balcony or veranda equipped with a waterproof pan and flooring, and the flooring is placed within the waterproof pan.

[0080] [Note 8] Appendix 8 is a building. A building comprises a building body having an exterior wall specified in any one of Appendix 1 to 7, and an overhang provided on the building body. [Explanation of symbols]

[0081] D1...First direction, SA...First gap, SB...Second gap, 1...Building, 2...Building body, 3...Protruding part, 7...Exterior wall, 8...Exterior wall body, 8A...Exterior side, 13...First exterior wall panel, 13A...Bottom end, 14...Second exterior wall panel, 14A...Top end, 14B...Exterior surface, 16...Opening end, 24...Waterproof pan, 25...Flooring material, 30...Water drainage member, 31...Upper part, 32...Middle part, 40...Drainage guide member, 41...Upper part of guide, 42...Lower part of guide.

Claims

1. An exterior wall having an overhang, The exterior wall itself, A first exterior wall panel is positioned with a first gap between it and the outer surface of the exterior wall body, A second exterior wall panel is located below the first exterior wall panel and is positioned with a second gap between it and the outer surface of the exterior wall body, A water drainage member is disposed between the first exterior wall panel and the second exterior wall panel, The outer wall is provided within the range in which the protruding portion is provided, and includes a drainage guide member connected to the water drainage member, The upper end of the second exterior wall panel is located above the floor surface of the overhang. An open end is formed between the lower end of the first exterior wall panel and the upper end of the second exterior wall panel, which connects to the first gap. The drainage member is positioned so as to separate the first gap and the second gap, with the open end not being closed. The drainage guide member is configured to extend from the open end to the protruding portion. The exterior wall of a building.

2. The drain member comprises an upper portion, an intermediate portion connected to the upper portion, and a lower portion extending downward from the intermediate portion. The upper portion of the water-draining member is positioned in the first gap so as to be along the outer surface of the outer wall body. The intermediate portion of the drain member is positioned to close the second gap. The lower portion of the water drain member is positioned to follow the outer surface of the second exterior wall panel. The exterior wall of the building according to claim 1.

3. In a plan view, the direction from the main body of the outer wall toward the overhang is defined as the first direction. The intermediate portion of the drain member is inclined downward in the first direction. The exterior wall of a building according to claim 2.

4. In a plan view, the direction from the main body of the outer wall toward the overhang is defined as the first direction. The drainage guide member has an upper guide portion and a lower guide portion connected to the upper guide portion. The upper part of the drainage guide member is inclined at a first inclination angle so as to follow the intermediate portion of the water-draining member. The lower part of the drainage guide member is inclined downward in the first direction at a second inclination angle greater than the first inclination angle. The exterior wall of a building according to claim 2.

5. The lower end of the drainage guide member does not come into contact with the floor surface of the protruding portion. The exterior wall of the building according to claim 1.

6. The drainage guide member is made of a waterproof steel plate. The exterior wall of the building according to claim 1.

7. The aforementioned overhang is configured as a balcony or veranda equipped with a waterproof pan and flooring, The flooring material is placed inside the waterproof pan. The exterior wall of the building according to claim 1.

8. A building having an exterior wall according to any one of claims 1 to 7.

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