JP4492948B2 - Roof ventilator and installation method - Google Patents

Description

  The present invention relates to a rooftop ventilation device for taking outside air into an upper portion of a drainage stack through a rooftop slab and a method for installing the same.

  Drainage stacks in high-rise buildings such as apartment buildings and buildings need to take in the outside air in order to allow smooth drainage to flow smoothly through them. Therefore, a vertical hollow vent pipe connected to the upper part of the drainage stack and an outside air introduction section for connecting the vent pipe to outside air and taking in outside air are provided. Hereinafter, a device used for such an outside air introduction section is referred to as a “rooftop ventilation device”.

FIG. 5 is a structural diagram of a conventional rooftop ventilation device that penetrates the rooftop slab. In this figure, 51 is a reinforced concrete roof slab, 52 is a vent pipe, 53 is a reinforced concrete protector that covers the top of the vent pipe, and 54 is a vent cover.
However, in such a conventional rooftop ventilator, it is necessary to place concrete with a reinforcing bar arrangement and a formwork of the protective body 53 after the vent pipe 52 is disposed through the roof slab 51. In addition, after that, there were problems that required many steps and labor, such as demolding of the mold, laying of the heat insulating material 55, and construction of the waterproof layers 56a and 56b.

  Therefore, Patent Documents 1 to 4 have already been proposed in order to simplify or omit the concrete placing process of the protector.

  As shown in FIG. 6, the “rooftop slab placement unit” of Patent Document 1 has a cylindrical structure with a closed upper end, and a communication hole 65 is formed in the side wall 64, and the rooftop slab is formed at the lower end. 67. The unit main body 62 is placed and fixed on 67, and one end of the unit main body 62 protrudes from the lower end side of the unit main body 62. The other end of the unit main body 62 is fitted into the communication hole 65 through the inside of the unit main body 62. . The unit main body 62 is filled with a heat insulating material 66 so as to enclose the conduit 63.

  As shown in FIG. 7, the “ventilator unit exclusively for vent pipe” of Patent Document 2 is a cylindrical body 77 having a cross section and a skirt that are larger than the vent pipe 75 fixed by an anchor unit 71 for fixing to a roof slab layer. The vent pipe 75 extends above the top surface of the cylindrical body, and is sealed between the cylindrical body and the vent pipe, and further includes a hood 74 attached to the top of the cylindrical body with a gap using a spacer metal fitting 76. In addition, a waterproof layer 78 provided on the top surface of the roof slab layer covers the wall surface of the cylindrical body 77.

  As shown in FIG. 8, the “construction method of pigeon shed” in Patent Document 3 is such that four wall skeleton members 80 each having a lattice rebar 82 welded to the entire surface are placed on a roof slab frame 84 in a rectangular shape. Then, reinforcing reinforcing bars are arranged at each joint, and the roof slab form part surrounded by the four members 80 is removed to form the opening 85, and on the lattice reinforcing bars side of the skeleton members 80 for each wall. Mortar is to be constructed. The roof slab concrete is placed after the reinforcing bars are placed.

  As shown in FIG. 9, a “drainage vent pipe joint and a method for constructing the drainage vent pipe joint” of Patent Document 4 includes a cylindrical portion 95 and an upper portion thereof in a concrete floor wall 93 constituting a rooftop floor. An embedding support 92 having a saucer 96 extending laterally from the edge is embedded integrally, the saucer 96 is disposed on the upper surface of the concrete floor wall 93, and the cylindrical part 95. After forming an insertion hole 94 penetrating the concrete floor wall 93 in the vertical direction, a joint pipe body 98 having a flange 97 at the lower end is placed on the receiving tray 96, and the flange 97 is bolted or the like. And a ventilation pipe 99 through which the insertion hole 94 of the concrete floor wall 93 is inserted is connected to the lower end portion of the joint pipe body 98.

Japanese Utility Model Laid-Open No. 7-20485, “Rooftop Slab Placement Unit” Japanese Patent Application Laid-Open No. 2004-3220, “Ventilation Pipe Dedicated Rooftop Unit” Japanese Patent Application Laid-Open No. 7-166686, “How to construct a pigeon hut” Japanese Patent Laid-Open No. 10-25865, “Drainage ventilation pipe joint and method for constructing the drainage ventilation pipe joint”

  The “rooftop slab placement unit” of Patent Document 1 uses (1) anchor bolts when fixing the unit main body to the rooftop slab, so that it takes time to drill the mounting holes for the anchor bolts in the reinforced concrete rooftop slab. 2) Although the roof slab is actually a flat roof, it requires a water gradient, the roof slab is slightly inclined, and before the unit body is fixed with anchor bolts to make the unit body vertical, the installation part of the unit body It was necessary to adjust the groundwork such as leveling the surface with mortar or partially cutting the roof slab, which was troublesome.

  Similarly to Patent Document 1, the “ventilator dedicated rooftop unit” of Patent Document 2 also requires (1) time and effort to pierce the anchor bolt mounting hole in the reinforced concrete roof slab when fixing the cylinder to the roof slab. (2) Before fixing the cylinder vertically with anchor bolts, it is necessary to adjust the groundwork such as leveling the installation part of the cylinder with mortar or partially scraping the roof slab. There was a problem such as this.

  Furthermore, Patent Documents 1 and 2 have the problem that (3) rooftop waterproofing work cannot be performed unless the work for basically covering the periphery of the vent pipe is completed.

  Patent Document 3 “Construction method of pigeon hut” does not have the trouble of anchoring and the like, and the construction can be simplified as compared with the conventional structure in which the ventilation pipe is covered with reinforced concrete. Since it is after the reinforcement reinforcing bars, (3) the roof waterproofing work after the roof slab is completed has a problem that it is further delayed.

  Patent Document 4 “Drainage Venting Pipe Fitting and Construction Method of Drainage Venting Pipe Fitting” (4) Position adjustment of the driving support that is embedded in the concrete floor wall is inclined by the pressure of the concrete. Or readjustment is likely to be necessary. (5) Moreover, foreign substances are likely to be mixed into the upper surface of the tray part and its screw holes, which takes time and effort for cleaning the driving support. In particular, when placing concrete on the roof slab, it is cured so that the concrete does not enter the screw holes, but it is very troublesome if the curing enters and the concrete enters. (6) Furthermore, since a large stress acts on the bolt connection part due to an impact by a person or animal (crow or cat), strong wind, etc., the driving support body and the joint pipe body are made of metal (for example, casting, stainless steel, etc.). If the maintenance (such as periodic overcoating to prevent aging deterioration) is not performed sufficiently, deterioration due to rust may be a problem.

  The present invention has been devised in view of these problems. That is, the purpose of the present invention is to reduce the position adjustment and readjustment and to cover work around the ventilation pipe much more labor-saving than before, and to start construction such as waterproofing on the roof earlier, and further, the necessity of maintenance Is to propose a roof ventilation device and its installation method.

According to the present invention, a buried pipe connecting member in the through hole penetrating the roof slabs vertically, extends to above the combined roof slabs fitted lower end to the tube connecting member, the outer peripheral surface on the outer circumferential surface A hollow cylindrical vent riser tube having a waterproof layer formed thereon, and a riser tube protection member that covers the upper end opening of the vent riser tube at an interval, and the waterproof layer is also provided on the surface of the roof slab. The rising pipe protective member is formed in an inverted container shape having an upper end closed, a lower end opened and a vent hole on a side portion, and the upper end fixed to the upper end of the vent riser pipe. The roof ventilator is characterized in that it is detachably connected to the ventilating riser pipe by bolting and the lower end thereof is located on the rooftop slab.

  According to a preferred embodiment of the present invention, the pipe connecting member has a vertical hollow vent pipe whose upper end is fitted and connected to the upper part of the drainage stack.

Further, the connection hardware extends horizontally, have a vertical female screw portion, the riser pipe protection member has a through hole into which a connecting bolt having a male threaded portion that is screwed with the female screw portion .

Further, according to the present invention, a pipe connecting member and a hollow cylindrical vent riser pipe that is fitted at the lower end and extends to the upper side of the roof slab are embedded in a through hole that vertically penetrates the roof slab, and then A first waterproof layer is formed on the surface of the roof slab and the outer peripheral surface of the ventilation riser pipe so as to cover the outer peripheral surface. The upper pipe protection member is positioned at the lower end on the roof slab, and the upper end of the riser pipe protection member is bolted to the connection hardware fixed to the upper end of the ventilating riser pipe. There is provided a method for installing a rooftop ventilation device, which is detachably connected to a pipe .

According to the present invention, a pipe connecting member and a hollow cylindrical vent riser pipe, which has a lower end fitted into the through hole that vertically penetrates the roof slab and extends upward from the roof slab, are embedded, and then the roof slab A first waterproof layer is formed so as to cover the outer surface of the gas and the outer periphery of the vent riser tube, and then the upper tube is closed, the lower end is opened, the lower end is opened, and the upside-down container-shaped riser tube protective member having a vent hole on the side portion is formed. Is a method of installing a rooftop ventilator connected to a ventilating riser pipe so that is located on the rooftop slab,
After the first waterproof layer is formed, before the riser pipe protecting member is connected, a heat insulation layer is further formed on the surface of the roof slab, and the second waterproof layer is formed so as to cover the surface and the outer periphery of the ventilation riser pipe. A method for installing a rooftop ventilation device is provided.

  According to the apparatus and method of the present invention, (1) the rising pipe protection member is detachably connected to the pipe connecting member embedded in the through-hole of the roof slab, so that an attaching portion such as an anchor bolt is unnecessary. It is possible to eliminate the trouble of drilling the mounting holes and the like. (2) Since the hollow cylindrical ventilation riser is attached with the lower end fitted to the pipe connecting member, the ventilation riser is placed vertically. This eliminates the need for mortar work and ground preparation. Furthermore, (3) before the completion of the work around the vent pipe, the roof waterproofing work can be started at an early stage with the lower end of the vent riser pipe fitted to the pipe connecting member.

  (4) Even if the pipe connecting member embedded in the concrete floor wall is slightly inclined due to the pressure of the concrete, etc., the rise pipe protecting member is attached to cover this, so that the vent pipe communicates with the outside air. Therefore, the position adjustment or readjustment of the pipe connecting member can be made unnecessary. Furthermore, (5) since the installation portion of the riser protection member is retrofitted to the ventilation riser tube, it is possible to prevent foreign matters from being mixed into the attachment portion and to eliminate the trouble of cleaning and the like. Also, (6) even when subjected to impacts or strong winds by humans or animals, the lower end of the riser protection member is positioned on the roof slab, so that the force is directly distributed to the roof slab via the riser protection member. The transmission force to the ventilation riser can be greatly reduced, and the ventilation riser can be made of resin or the like. Accordingly, the cost can be reduced, and the need for maintenance such as top coating can be reduced or eliminated.

Therefore, it is possible to significantly reduce the labor required to cover the ventilation pipe by reducing the position adjustment and readjustment, and to start work such as waterproofing on the roof at an early stage, and to reduce the necessity for maintenance.
Moreover, since the ventilation riser is vertical and does not bend, it is easy to clean. Furthermore, since the rising pipe protection member is placed on the rooftop waterproof layer, the rising pipe protection member can be installed around the ventilation riser pipe without breaking the heat insulating layer.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a cross-sectional view of the roof ventilation apparatus of the present invention. As shown in this figure, the rooftop ventilation device 10 of the present invention includes a pipe connecting member 12, a hollow cylindrical ventilation riser pipe 14, and a riser pipe protection member 16.

  In this example, the pipe connecting member 12 is a hollow cylindrical pipe joint (socket) for vertically connecting pipes having the same diameter, and has a ring-shaped flange portion that supports the pipe end. However, the present invention is not limited to this, as long as the lower end of the ventilation riser pipe 14 can be supported, the ventilation pipe 22 described later can be connected in a state where the inside communicates, and the inside of the roof slab 1 is fixed. Any free structure may be used.

The pipe connecting member 12 is installed by being embedded in a through hole 2 that vertically penetrates the roof slab 1. The pipe connecting member 12 is preferably laid and installed simultaneously with the placing of the concrete forming the roof slab 1, but the present invention is not limited to this, and the pipe connecting member 12 is buried in the through hole 2 after the roof slab 1 is completed. -It may be installed and fixed with mortar.
The material of the pipe connecting member 12 is preferably hard plastic (for example, vinyl chloride resin), but may be a corrosion-resistant metal such as aluminum or copper alloy.

The hollow cylindrical vent riser pipe 14 is a vertical straight pipe in this example, and both ends thereof are cut perpendicular to the axis and opened. The length of the ventilation riser pipe 14 is set such that the lower end is fitted to the pipe connecting member 12 and the upper end protrudes upward from the roof slab 1 by a predetermined length L. This predetermined length L can be arbitrarily set based on the required height of a waterproof layer around the ventilation riser pipe described later.
The material of the ventilation riser pipe 14 is preferably a hard plastic (for example, vinyl chloride resin), but may be a corrosion-resistant metal such as aluminum or copper alloy.
In FIG. 1, a ventilation rise pipe 14 and a socket 12 are embedded in a reinforced concrete roof slab 1, and the ventilation rise pipe 14 and the ventilation pipe 22 are connected via the socket 12.
The vent pipe 22 is a heat-resistant two-layer pipe. Further, the socket 12 has a role of not transmitting the expansion and contraction of the ventilation rise pipe 14 and the ventilation pipe 22 to each other, and is connected with a gap.

In FIG. 1, the roof-top ventilation device 10 of the present invention further includes a connection hardware 18 fixed to the upper end of the ventilation riser pipe 14.
FIG. 2 is a perspective view of the connection hardware. As shown in FIGS. 1 and 2, the connection hardware 18 extends horizontally across the upper end opening 14a of the ventilating riser pipe 14 in the diametrical direction, and has a vertical female screw portion 18a in the middle portion thereof. Have screw holes 18b. The intermediate female screw portion 18a may be formed directly on the connection hardware 18 or may be formed by fixing a nut or the like.
The connection hardware 18 is installed so as to sandwich the upper part of the ventilating riser pipe 14, and both ends thereof are fixed to the upper end opening 14 a of the ventilating riser pipe 14 by screws (preferably made of stainless steel) passing through the screw holes 18 b.

  As shown in FIG. 1, the riser protection member 16 covers the upper end opening 14a of the ventilation riser pipe 14 with a space therebetween so that rainwater and foreign matter do not enter directly from the upper end opening 14a. This interval is, for example, 1 cm to 10 cm, and can be arbitrarily set within a range in which the air flow resistance from the upper end opening 14 to the outside does not increase significantly.

As shown in the drawing, the riser protection member 16 has an inverted container shape with the upper end 16a closed, the lower end 16b open, and a plurality of vent holes 16c on the side. The vent hole 16c preferably has a shape that prevents rainwater from entering the inside and has good air permeability.
In the embodiment, the longitudinal direction is a horizontally long slit of about 2 cm. The smallest birds that make a nest in the gap include a dove and a starling, and the gap of 2 cm is a dimension that can prevent the entry of these birds. Accordingly, a bird net is not necessary.
The lower end 16b is provided with a notch 16d so as to drain rainwater that has entered the interior.

Further, the upper end 16a of the riser protection member 16 has a through hole 17 at a position that coincides with the female screw portion 18a of the connection hardware 18 in the vertical direction. A connecting bolt 19 (preferably made of stainless steel) is vertically passed through the through-hole 17, and the male screw portion is screwed with the female screw portion 18a, so that the upper end of the rising tube protection member 16 is connected to the ventilation rising tube 14. Fix it detachably. Further, at the time of fixing, the lower end is positioned on the upper surface of the roof slab 1, and the weight of the rising pipe protection member 16 and the external force acting thereon are distributed and transmitted to the roof slab.
When the pipe connecting member 12 embedded in the concrete floor wall 1 is slightly inclined due to the concrete pressure or the like, the connecting metal 18 is inclined in accordance with this, and the connecting bolt 19 is screwed to stand up. The upper pipe protection member 16 can be accurately attached, and all the original functions of taking in the outside air by allowing the ventilation pipe to communicate with the outside air can be maintained as they are.

  Further, the means for fixing the riser protection member 16 to the ventilation riser 14 is not limited to the connection hardware 18 and the connecting bolt 19 described above, and for example, a structure that partially fits inside (bayonet coupling or the like). It may be.

3A is a side view of the riser protection member 16, and FIG. 3B is a plan view thereof.
As shown in FIG. 3A, in this example, the side surface has a substantially trapezoidal shape, and a long hole 16c is provided at a substantially intermediate position of the side surface. Thereby, the ventilation | gas_flowing to the ventilation raising pipe 14 can be ensured, and invasion of rainwater can be prevented.
Further, as can be seen from the plan view of FIG. 3B, the plane is a substantially hexagonal hexagon, and legs are formed in three directions. For this reason, it is easy to cope with the inclination and unevenness of the roof slab surface, and stable placement is possible.
In addition, the shape of the riser protection member 16 is not limited to the above, and the side view is a bell shape, has a hook on the upper part of the vent hole, or imitates the form of animals and plants It is possible to configure in various shapes.
The vent hole 16c is not limited to a horizontally long hole, and may be a circle, a quadrangle, a horizontally slanted hole, or the like.

  In FIG. 1, the rooftop ventilator 10 of the present invention further includes a vertical hollow vent pipe 22 that is fitted at the upper end of the pipe connecting member 12 and connected to the upper part of the drainage stack, In order for the miscellaneous wastewater to flow smoothly, outside air is taken into the upper part.

The first waterproof layer 24 is applied so as to be wound directly around the ventilation riser tube 14, and the riser tube protection member 16 (not shown) is placed so as to cover it.
The ventilation riser pipe 14 has a ventilation opening at the top, and takes in outside air through a ventilation hole provided in the riser protection member 16.
The riser protection member 16 is made of, for example, glass fiber reinforced concrete, and is manufactured with about 10 kg as a guide. The riser protection member 16 has a trapezoidal shape with a height of around 40 cm. In addition, the bolt is joined at the upper portion of the ventilating riser pipe so as not to be taken away by mischief or the like, but other coupling means may be used.

With the above-described configuration, outside air enters the upper portion of the drainage stack from the upper end opening 14a through the vent hole 16c of the rising pipe protection member 16 while preventing rainwater and foreign matter from entering from the upper end opening 14a of the ventilation riser pipe 14. Can be incorporated.
In addition, rainwater does not easily enter the inside from the vent hole 16c of the riser protection member 16, and even if it enters, the rainwater that has entered inside can be smoothly drained from the cutout portion 16d of the lower end 16b.

FIG. 4 is an explanatory diagram of a method for installing the rooftop ventilation device according to the present invention.
As shown in this figure, the installation method of the roof ventilation apparatus of the present invention includes an embedding step (A), a waterproof layer forming step (B), a heat insulating layer and a second waterproof layer forming step (C), and a protective member fixing step. (Not shown).

In the embedding step (A), a pipe connecting member 12 (socket) is fitted into a through-hole 2 that vertically penetrates the roof slab 1, and a hollow cylindrical vent riser pipe 14 is fitted to the lower end thereof and extends upward from the roof slab. And bury and fix.
When the roof slab 1 made of reinforced concrete is constructed, it is preferable that the vent riser pipe 14 and the socket 12 are embedded in a predetermined position and the concrete of the roof slab 1 is placed. In addition, when placing the concrete of the roof slab 1, a void (through hole) is formed at a predetermined position, and after the concrete of the roof slab 1 is placed, the ventilation rise pipe 14 and the socket 12 are embedded with mortar. May be. Alternatively, only the socket 12 may be embedded and fixed first, and the ventilation riser 14 may be inserted and fitted into the socket 12 later.

  Next, in the waterproof layer forming step (B), the first waterproof layer 24 is formed so as to cover the surface of the roof slab 1 and the outer periphery of the ventilation riser pipe 14.

In the heat insulating layer and second waterproof layer forming step (C), after the first waterproof layer 24 is formed and before the riser protection member 16 is connected, the surface of the roof slab 1 (more precisely, the first waterproof layer) A heat insulating layer 25 is formed on the surface 24 and a second waterproof layer 26 is formed so as to cover the surface and the outer periphery of the ventilation riser tube 14.
Further, after the second waterproof layer 26 is formed, the end of the waterproof layer located at the upper portion of the ventilation riser pipe 14 is tightened with a stainless steel fastening band 27, and then the waterproof seal 28 (rubber is attached to the end of the waterproof layer. Quality asphalt sealing).

  In the method of the present invention, the heat insulating layer and the second waterproof layer forming step (C) are not essential, and one or both of the heat insulating layer 25 and the second waterproof layer 26 can be omitted, or conversely, the heat insulating layer. The waterproof layer may be further increased, or another layer (eg artificial grass) may be installed.

Thereafter, in order to prevent removal by mischief, if the riser protection member 16 is fixed to the upper part of the ventilating riser tube 14 with bolts and the riser protection member 16 is placed, the installation of the rooftop ventilation device 10 is performed. Is completed.
When the riser protection member 16 is placed, a rubber packing 20 or the like is preferably provided between the second waterproof layer 26 and the riser protection member 16. Thereby, it is possible not only to prevent the surface of the second waterproof layer 26 from being damaged by the rising pipe protection member 16 but also to cope with a subtle inclination of the water gradient on the land roof.

As described above, according to the roof ventilation device and the installation method of the present invention, the construction around the roof ventilation pipe can be greatly reduced, and the roof waterproofing construction can be performed before the construction covering the roof ventilation pipe. Considering the entire construction period can also contribute to shortening the construction period.
In addition, although it has a simple structure, it does not impair the function as a vent pipe and the waterproof performance around the roof including the vent pipe.

  In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously, unless it deviates from the summary of this invention.

It is a cross-sectional view of the roof ventilation apparatus of this invention. It is a perspective view of a connection metal fitting. It is the side view and top view of a rising pipe protection member. It is explanatory drawing of the installation method of the roof ventilation apparatus by this invention. It is a structural diagram of a conventional rooftop ventilation device. FIG. 6 is a structural diagram of a “rooftop slab placement unit” of Patent Document 1. FIG. 6 is a structural diagram of “a roof pipe-dedicated rooftop unit” of Patent Document 2. It is explanatory drawing of "the construction method of a pigeon hut" of patent document 3. FIG. FIG. 6 is a structural diagram of “Drainage vent pipe joint and construction method of drainage vent pipe joint” of Patent Document 4.

Explanation of symbols

1 roof slab, 2 through holes,
10 rooftop ventilation device, 12 pipe connecting member (socket),
14 vent riser pipe, 14a upper end opening,
16 Rising pipe protection member, 16a upper end, 16b lower end,
16c vent hole, 16d notch,
17 through-hole, 18 connecting hardware, 18a female thread, 18b screw hole,
19 connecting bolt, 20 packing,
22 vent pipe, 24 first waterproof layer,
25 heat insulation layer, 26 second waterproof layer,
27 Tightening band, 28 Waterproof seal

Claims (5)

A pipe connecting member embedded in a through-hole that vertically penetrates the roof slab, and a waterproof layer that covers the outer peripheral surface is formed on the outer peripheral surface of the pipe connecting member, the lower end of which is fitted to the pipe connecting member and extends upward from the roof slab. A hollow cylindrical vent riser pipe and a riser pipe protection member that covers the upper end opening of the vent riser pipe with a space therebetween , and a waterproof layer is also formed on the surface of the roof slab,
The rising pipe protection member has an inverted container shape having an upper end closed and a lower end opened and a vent hole formed on a side portion thereof, and the upper end thereof is bolted to a connection hardware fixed to the upper end of the ventilation rising pipe. wherein it is removably connected to the vent riser pipe, roof venting device which its lower end is located on the roof slab, characterized in that.   2. The rooftop ventilator according to claim 1, further comprising a vertical hollow vent pipe having an upper end fitted into the pipe coupling member and coupled to an upper portion of the drainage stack. The connection hardware extends horizontally, have a vertical female screw portion,
The roof ventilating apparatus according to claim 1, wherein the rising pipe protecting member has a through hole through which a connecting bolt having a male screw part screwed with the female screw part is passed. A pipe connecting member and a hollow cylindrical vent rise pipe that extends to the upper side of the roof slab are embedded in a through-hole that vertically penetrates the roof slab, and then the surface of the roof slab and the vent rise A first waterproof layer is formed on the outer peripheral surface of the pipe so as to cover the outer peripheral surface , and then an upside-down container protection member having an inverted container shape having an upper end closed, a lower end opened, and a vent on a side portion is formed at the lower end. It is positioned on the roof slab, and the upper end of the rising pipe protection member is detachably coupled to the ventilating riser pipe by a bolt joint with a connection hardware fixed to the upper end of the ventilating riser pipe. The installation method of the roof ventilation apparatus characterized by the above-mentioned. A pipe connecting member and a hollow cylindrical vent rise pipe that extends to the upper side of the roof slab are embedded in a through-hole that vertically penetrates the roof slab, and then the surface of the roof slab and the vent rise The first waterproof layer is formed so as to cover the outer periphery of the pipe, and then the upside-down container protection member in the inverted container shape having the upper end closed, the lower end opened and the side part has a vent hole is positioned on the roof slab. A method for installing a rooftop ventilation device connected to a ventilation riser pipe ,
After the first waterproof layer is formed, before the riser pipe protecting member is connected, a heat insulation layer is further formed on the surface of the roof slab, and the second waterproof layer is formed so as to cover the surface and the outer periphery of the ventilation riser pipe. A method for installing a rooftop ventilation device, characterized in that

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