KR102201208B1 - Structural and Construction Method of Roof Drain for External Water and Exterior Insulation Drainage Plates on the Rooftop - Google Patents

Abstract

The present invention relates to a roof drain for draining rainwater or other wastewater and, more specifically, to a roof drain for external waterproofing and external insulating drain plates on a rooftop floor of a flat roof and a construction method using the same, wherein the roof drain enables customized construction in accordance with an external insulating and waterproofing structure of the rooftop. The roof drain includes a lower main body (110), an upper main body (130), a lower nut (133), a first height adjusting member (140), a second height adjusting member (150), a third height adjusting member (160), an upper nut (163), and a strainer (170).

Description

Structural and Construction Method of Roof Drain for External Water and Exterior Insulation Drainage Plates on the Rooftop}

The present invention relates to a roof drain for draining rainwater or other wastewater, and more particularly, to the exterior waterproofing of a flat roof rooftop that can be customized according to a rooftop exterior insulation waterproofing structure, a roof drain for an exterior insulation drainage plate, and a construction method using the same. About.

In general, a drain hole for discharging rainwater to the outside is provided on the roof of a building, and a roof drain is installed at the drain hole so that the drain hole is not blocked during the roof insulation waterproofing construction.

1 is a cross-sectional view sequentially showing a conventional rooftop exterior insulation waterproofing construction process, as shown, in the conventional rooftop exterior insulation waterproofing construction, primer application and waterproofing sheet in a state in which the concrete slabs 1 on the roof of the building are evenly arranged. After forming a waterproof layer (2), forming a heat insulating layer (3) on the waterproof layer (2), and then forming a protective layer (4) with a sheet of PE material on the insulating layer (3), the protection Pressed concrete 5 is poured on the top of the layer 4, and expansion joints 6 are formed on the pressed concrete 5 so as to cope with expansion and contraction phenomena according to temperature changes.

In such a conventional external thermal insulation waterproof structure, since the thermal insulation layer 3 and the protective layer 4 have a sealed wet structure integrated based on the pressed concrete 5, it is difficult for moisture to penetrate into the insulation layer 3 It has the advantage of superior insulation and waterproofing performance compared to the heat-resistant, heat-resistant and waterproof structure in which an insulating material is installed on the wall.

However, in the conventional external heat-insulating and waterproofing structure, the pressed concrete 5 repeatedly contracts and expands under climatic conditions in which four seasons are distinct, and in this process, the pressed concrete 5 is cracked and the protective layer 4 and It has a problem that moisture permeation easily occurs with the heat insulating layer 3.

In this way, the moisture that has passed through the pressed concrete 5 penetrates into the protective layer 4 and the insulation layer 3 under the pressed concrete 5, causing a deterioration in the performance of the insulation layer 3 and is easily discharged to the outside. It is not possible, and due to the change in the outside air temperature under the pressed concrete 5, a crack is generated in the waterproof layer 2 while continuing to contract and expand, and freeze and thaw repeatedly, resulting in a roof leak.

In this case, since the insulating layer 3, the protective layer 4, and the pressed concrete 5 are located on the waterproof layer 2, it becomes very difficult to grasp what causes the leakage and where the defect is.

Therefore, under the conventional external insulation insulation waterproofing structure, when water leaks on the rooftop, it is necessary to remove the pressed concrete 5 and perform front repair to replace both the insulation layer 3 and the waterproof layer 4, which incurs enormous cost. Even after the repair is completed, the leakage defects as described above will recur, so it is necessary to prepare fundamental countermeasures.

2 is a cross-sectional view showing a roof drain for a conventional flat roof rooftop exterior waterproofing and exterior insulation drainage plate, and as shown, a roof drain 10 is also installed so that the drain hole is not blocked during the above roof insulation waterproofing construction. As for the conventional roof drain 10, the lower body 11 is inserted into the drain hole and the lower flange 14 is positioned above the waterproof layer 2, and then the fastening bolt 16 and the lower nut 17 are used. After fixing to the lower body (11), after forming the insulation layer (3), fix the upper flange (15) on the top of the insulation layer (3) using the intermediate nut (18) and the upper nut (19), and then (15) It is constructed by installing a strainer 12 on it.

The conventional roof drain 10 installed in this way is made to make a steep slope around the installation of the roof drain 10 by the finish height of the pressed concrete 5 poured on the heat insulating layer 3, so that it is higher than the upper end of the strainer 12. In most cases when the finish height of the pressed concrete (5) is high, foreign substances of the pressed concrete (5) are accumulated on the strainer (12) by the flow of rainwater or sewage, and the hole of the strainer (12) is blocked. There is a problem that interferes with the discharge of the back.

In this way, the upper flange (15) is additionally installed in accordance with the finished height of the pressed concrete (5) using the upper nut (19) and the intermediate nut (18) by extending the fastening bolt (16). There is also a method by installing the strainer 12 on the upper flange 15, but in this case, when the pressing concrete 5 is poured, the pressing concrete 5 is placed inside the lower body 11 into the empty space between the upper flanges 15. Since it flows into the upper flange 15, there is an inconvenience of blocking the empty space between the upper flanges 15, so it cannot be an appropriate alternative.

Korean Patent Publication No. 1447527 Korean Patent Publication No. 00602899

The present invention was conceived to solve the above problems, and the customized construction according to the roof external insulation waterproof structure capable of preventing the roof leakage phenomenon due to cracks of the pressed concrete and minimizing the repair cost and recurrence of defects when the roof leaks It is an object of the present invention to provide a possible flat roof rooftop exterior waterproofing, a roof drain for an exterior insulation drainage plate, and a construction method using the same.

In order to achieve the above object, the present invention provides a lower waterproof layer formed on a concrete slab with a drain hole, an insulating layer formed on the lower waterproof layer, a moisture permeation prevention layer formed on the heat insulating layer, and a drainage layer formed on the moisture permeation prevention layer. And, in the roof drain for a flat roof roof top floor and external insulation drain plate installed on a roof having an external insulation waterproof structure including a drainage layer protection layer installed on the drainage layer and a crushed stone layer formed on the drainage layer protection layer ; A lower body having an inner body inserted into the drain hole, a mounting flange formed outside the inner body and positioned above the concrete slab, and a plurality of computer bolts vertically installed on the inner body; An upper body having an inner body that passes through the computing bolt and is seated on the upper portion of the lower body, and a lower waterproof layer pressing flange formed on the outside of the inner body and positioned above the lower waterproof layer; A lower nut fastened to the computational bolt to fix the upper body; A first height adjustment member having an inner body that passes through the computing bolt and is fitted to be lifted and lowered into the upper body, and a moisture-permeable layer pressing flange positioned above the moisture-permeable layer; A second height having an inner body that passes through the computational bolt and is fitted to the inside of the first height adjustment member so as to be elevated, and a drainage layer protective layer pressing flange formed on the outside of the inner body and positioned above the drainage layer protective layer Adjusting member; A third height adjustment having an inner body that passes through the computational bolt so as to be liftably fitted to the inside of the second height adjustment member, and a crushed stone layer pressing flange formed on the outside of the inner body and positioned above the crushed stone layer. absence; An upper nut fastened to the computational bolt to fix the third height adjustment flange; And a strainer fitted and coupled to the inside of the third height adjusting flange so that the lower end is seated on the upper inner body of the second height adjusting flange.

In addition, a first through hole is formed at an upper end of the inner body of the upper body so that moisture located above the lower waterproof layer can be introduced, and a first through hole communicating with the first through hole is at a lower end of the first height adjustment member. A groove is formed, and a second through hole is formed at an upper end of the first height adjustment member to allow moisture located above the moisture permeation prevention layer to flow, and a lower end of the second height adjustment member communicates with the second through hole. The second groove may be formed.

In this case, a third through hole is formed at an upper end of the second height adjustment member so that moisture located above the drainage layer protective layer can be introduced, and a lower end of the third height adjustment member communicates with the third through hole. A third groove may be formed.

In addition, the present invention is a method of constructing a roof drain for external waterproofing of a flat roof roof and an external insulation drainage plate, the step of fitting a lower body into a drain hole formed in a concrete slab on the roof of a building, and forming a lower waterproof layer on the top of the concrete slab And, the step of coupling the upper body to the lower body, the step of temporarily coupling a first height adjustment member to the upper portion of the upper body, the step of forming a heat insulating layer and a moisture permeation prevention layer on the lower waterproof layer, and the Adjusting the height of the first height adjustment member temporarily coupled according to the height of the moisture permeation prevention layer, the step of temporarily coupling a second height adjustment member to the upper portion of the first height adjustment member, and a drainage layer on the upper portion of the moisture absorption prevention layer Forming a drainage layer protective layer, adjusting the height of the second height adjustment member temporarily coupled according to the height of the drainage layer protective layer, and seating the strainer on the second height adjustment flange; and the second The step of temporarily coupling a third height adjustment member to the top of the height adjustment flange, forming a crushed stone layer on the top of the drainage layer protective layer, and adjusting the height of the combined third height adjustment member according to the height of the crushed stone layer. And fixing the third height adjustment flange by fastening a nut to the computational bolt.

The roof drain for the external waterproofing and external insulation drainage plate of the flat roof of the present invention configured as described above has a first height adjustment unit, a second height adjustment unit, and a third height adjustment unit capable of freely changing the height. It has the effect of enabling precise construction according to the height of each layer constituting the insulating waterproof layer.

In addition, the present invention has an effect of minimizing leakage defects because the water is drained over a total of three times through the first height adjustment unit, the second height adjustment unit, and the third height adjustment unit.

1 is a cross-sectional view sequentially showing a conventional roof insulation waterproof construction process.
Figure 2 is a cross-sectional view showing a conventional roof drain for external insulation waterproofing.
Figure 3 is a cross-sectional view showing a roof drain structure for the roof top waterproof, outer insulation drainage plate of the present invention.
4A and 4B are views sequentially showing a roof drain construction method for a rooftop exterior waterproofing and an exterior insulation drainage plate of the present invention, respectively.

Features and advantages of the present invention will become more apparent from the detailed description of the following preferred embodiments based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of terms in order to describe his or her invention in the best way. It must be interpreted as a corresponding meaning and concept

In addition, terms or words used in the specification and claims are used only to describe specific embodiments, and are not intended to limit the present invention.

For example, a singular expression includes a plural expression unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "includes" or "have" are intended to designate the presence of features, numbers, steps, actions, elements, parts, or combinations of those described in the specification, but one or more It is to be understood that other features or possibilities of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof are not preliminarily excluded.

Further, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "under" another part, this includes not only the case where the other part is "directly below", but also the case where there is another part in between.

In addition, terms including ordinal numbers such as "first" and "second" used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from other components.

Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same configuration, and only different parts will be mainly described so as not to overlap as possible for clarity.

3 is a cross-sectional view showing a roof drain structure for a rooftop exterior waterproofing and an exterior insulation drainage plate according to the present invention, and FIGS. 4A and 4B are views sequentially showing a roof drain construction method for a rooftop exterior waterproofing and exterior insulation drainage plate of the present invention, respectively. , As shown, the roof drain for a flat roof rooftop of the present invention for external waterproofing and external insulation drainage plates is a lower waterproof layer 10 formed on the concrete slab 1 with a drain hole 1a, and the lower waterproof layer 10 The heat-insulating layer 20 formed on the heat-insulating layer 20, the moisture-permeable layer 30 formed on the heat-insulating layer 20, the drainage layer 40 formed on the moisture-permeable layer 30, and the drainage layer protective layer installed on the drainage layer 40 It is applied on a rooftop having an external heat insulation waterproof structure including (50) and a crushed stone layer (60) formed on the drainage layer protective layer (50).

The lower waterproof layer 10 may be a waterproof coating layer applied on the rooftop concrete slab 1 or a waterproof sheet layer formed by spreading a waterproof sheet on the rooftop concrete slab 1.

Of course, the lower waterproof layer 10 may be formed of a composite structure in which a waterproof sheet layer is formed on a waterproof paint layer.

On the other hand, it is preferable that the waterproof sheet layer is formed by overlapping at least one or more layers of the waterproof sheet to increase waterproof reliability.

In this case, the overlapping width is to be made within the range of 70 to 130mm. If the overlapping width is less than 70mm, sufficient adhesion is not generated between the waterproof sheets, so that a defect in which moisture penetrates into the overlapping part is likely to occur. If the overlapping width exceeds 130mm, waste of materials is excessive and economic efficiency is greatly reduced.

In addition, a primer layer may be further formed under the lower waterproof layer 10.

The primer layer is formed by applying a primer solution before forming the lower waterproof layer 10 on the rooftop concrete slab 1.

The primer solution is a highly volatile, low viscosity liquid, which is strongly adhered to the upper part of the concrete slab (1) to form a film, thereby helping the waterproofing solution or the waterproof sheet to be easily adhered to the upper part of the concrete slab (1) without lifting. .

A heat insulating layer 20 is formed on the lower waterproof layer 10 as described above.

The insulation layer 20 is formed by laying insulation panels made of various materials having low thermal conductivity to a predetermined thickness so as to block the heat of the rooftop concrete slab 1 from moving to the room.

Here, since the heat insulating panel is a known technology that has already been commercialized and marketed, a detailed description thereof will be omitted.

On the other hand, the heat insulating panel is preferably made of a material having excellent waterproof properties, such as an extruded polystyrene, so as to prevent damage due to moisture when moisture penetrates.

According to the present invention, the insulation panels do not adhere to the upper surface of the concrete slab 1 so that future repairs can be easily performed. Therefore, the construction of the heat insulating layer 20 is made very quickly and easily.

However, when a gap is opened between the insulation panels due to the top surface gradient of the concrete slab 1 and damage to the corners of the released insulation panel, urethane foam may be filled between the gaps. In some cases, urethane foam may be installed under the insulation panel to adjust the level.

On the other hand, it is preferable that the insulation panel is constructed in one layer. This is because when the insulation panel is constructed as a double layer because the thickness of the insulation panel is thin, a water film is easily formed between the insulation panels, and when the water film thus formed freezes, it acts as a moisture-proof layer and may interfere with moisture discharge.

In addition, an uneven portion 121 may be formed at an edge of the insulating panel. The insulation panels are fitted and coupled to each other using the uneven portion 121. The concave-convex portion 121 bends the passage of moisture so as to prevent moisture penetrating into the heat insulating layer 20 from passing through the heat insulating panel.

A moisture permeation prevention layer 30 is formed on the heat insulating layer 20 as described above.

The moisture permeable layer 30 prevents external moisture, including rain or snow, from penetrating into the insulation panel.

In this case, the moisture permeable layer 30 may be formed by overlapping a waterproof sheet. In other words, two adjacent waterproof sheets are stacked by 100mm without adhesion.

Accordingly, a small amount of moisture is allowed to penetrate through the overlapping portion of the waterproof sheet, and moisture that has passed through the moisture permeation prevention layer 30 is discharged to the heat insulating layer 20 located below.

On the other hand, it is possible to finish the overlapped part by using an adhesive tape so that the overlapping part does not lift, and if the width of the overlapping part is more than 150mm, it is not necessary to perform taping.

A drainage layer 40 is formed on the moisture permeable prevention layer 30 as described above.

The drainage layer 40 is composed of drainage plates having a plurality of drainage holes in the vertical direction. The drainage plate is suitable for a landscaping drainage plate made of synthetic resin.

The drainage plate configured as described above protects the heat insulation layer 20 by dispersing external impacts on the heat insulation layer 20 located below, and spreads moisture that has passed through the crushed stone layer 60 to smoothly discharge it to the drain port 1a.

In view of this, it is preferable that the thickness of the drainage layer 40 is configured to be at least 30 mm or more so that shock absorption is achieved without difficulty.

A drain layer protective layer 50 made of a drain layer protective sheet made of a nonwoven fabric is formed on the drain layer 40. The drainage layer protective sheet made of the non-woven fabric has excellent thermal insulation properties and lowers the rooftop temperature and prevents dust from penetrating from the outside.

In addition, a crushed stone layer 60 is formed on the drainage layer protective layer 50.

The crushed stone layer 60 is formed by laying crushed stone.

The crushed stone layer 60 protects the drainage plate, the waterproof sheet, and the insulation panels below the drainage plate, the waterproof sheet, and the insulation panels under their own load so that they are not lost or flowed by the wind.

In addition, the crushed stone layer 60 prevents heat storage generated on the roof and prevents the indoor temperature from increasing excessively in summer or excessively decreasing the indoor temperature in winter.

On the other hand, the crushed stone has a suitable diameter of around 35 mm so as not to fly away in strong winds.

In addition, the thickness of the crushed stone layer 60 is determined according to the thermal insulation performance of the building and whether or not the rooftop is utilized.

The roof drain for the outer waterproofing, external insulation drainage plate of the flat roof of the present invention includes a lower body 110 and an upper body 130, a first height adjustment member 140, a second height adjustment member 150, and a third height adjustment. It is largely composed of a member 160 and a strainer 170.

The lower body 110 includes an inner body 111 inserted into the drain hole 1a, and a mounting flange 112 extending outside the inner body 111.

The mounting flange 112 is located above the concrete slab 1 to support the inner body 111 so that it does not enter the drain hole 1a.

In addition, a plurality of computing bolts 120 are vertically installed on the inner body 111 at a predetermined interval.

The upper body 130 has an inner body 131 that passes through a computing bolt 120 and is seated on the lower body 110, and extends outside the inner body 131 to form the lower waterproof layer 10. It is provided with a lower waterproof layer pressing flange 132 located on the top of the.

The upper body 130 is firmly fixed so that it does not flow by the lower nut 133 fastened to the computing bolt 120.

On the other hand, the first height adjustment member 140 is located on the inner body 141, which is fitted to the inside of the upper body 130 through the computer bolt 120 so as to be elevating, and the heat insulating layer 20 It is provided with a moisture-permeable layer pressing flange (142).

In addition, the second height adjustment member 150 passes through the computer bolt 120 and is fitted to the inside of the first height adjustment member 140 so as to be elevating, the inner body 151, and the inner body 151 It is formed on the outside of and includes a drain layer protective layer pressing flange 152 positioned on the drain layer protective layer 50.

In addition, the third height adjustment member 160 passes through the computer bolt 120 and the inner body 161, which is fitted to the inside of the second height adjustment member 150 so as to be elevating, and the inner body 161 It is formed on the outside and includes a crushed stone layer pressing flange 162 positioned on the upper portion of the crushed stone layer (60).

The third height adjustment member 160 is firmly fixed so that it does not flow by the upper nut 163 fastened to the computing bolt 120.

In addition, the strainer 170 is fitted inside the third height adjustment member 160, and is installed with a lower end seated on the inner body 151 of the second height adjustment member 150. The upper portion of the strainer 170 is exposed to the upper portion of the crushed stone layer 60.

On the other hand, moisture located above the lower waterproof layer 10 flows into the upper end of the inner body 131 of the upper body 130 so that the moisture that has penetrated into the lower waterproof layer 10 can be discharged through the drain hole 1a. It is preferable that a first through hole 135 is formed, and a first groove part 145 communicating with the first through hole 135 is formed at a lower end of the first height adjustment member 140.

In addition, the moisture in the upper portion of the first height adjustment member 140 to allow the moisture penetrating into the moisture permeable layer 30 to be discharged through the drain hole 1a. A second through hole 146 may be formed, and a second groove portion 155 communicating with the second through hole 146 may be formed at a lower end of the second height adjustment member 150.

In addition, moisture located above the drainage layer protection layer 50 flows into the upper end of the second height adjustment member 150 so that moisture that has penetrated into the drainage layer protection layer 50 can be discharged through the drain hole 1a. A third through hole 156 is formed, and a third groove portion 165 communicating with the third through hole 156 may be formed at a lower end of the third height adjustment member 160.

The roof drain for the external waterproofing and external insulation drainage plate of the present invention constructed as described above is constructed in the following manner.

First, the lower body 110 is inserted and coupled to the drain hole 1a formed in the concrete slab 1 on the roof of the building.

Then, after applying the primer on the upper part of the concrete slab (1) on the roof of the building, when the primer is dried after a certain period of time, a waterproof paint is applied or a waterproof sheet is laid thereon to form the lower waterproof layer 10. At this time, it is okay to perform both the application of the waterproof paint and the installation of the waterproof sheet.

In addition, waterproofing around the drain hole 1a formed in the rooftop concrete slab 1 is also performed. In this case, it may be reinforced with asphalt-based silicone after lowering and attaching the waterproof sheet to the inside of the drain hole 1a.

In this way, when the lower waterproof layer 10 is completed, the upper body 130 is coupled to the lower body 110.

When the upper body 130 is coupled, the lower nut 133 is fastened to the computing bolt 120 to firmly fix the upper body 130 on the upper part of the lower body 110.

In addition, the first height adjustment member 140 is temporarily coupled to the upper portion of the upper body 130.

When the first height adjustment member 140 is temporarily coupled, the insulation panels are laid on the lower waterproof layer 10 to form the insulation layer 20, and a waterproof sheet is laid on the insulation layer 20 so that moisture does not penetrate into the insulation panel. The moisture permeation prevention layer 30 is formed to prevent it.

And the height of the first height adjustment member 140 is temporarily coupled so that the moisture-permeable layer pressing flange 142 is in close contact with the upper end of the moisture-permeable layer 30 according to the height of the completed moisture-permeable layer 30 is adjusted.

When the height adjustment of the first height adjustment member 140 is completed, the second height adjustment member 150 is temporarily coupled to the upper portion of the first height adjustment member 140.

In addition, drainage plates are laid on the moisture permeation prevention layer 30 to form a drainage layer 40, and then a drainage layer protection sheet made of a nonwoven fabric is laid on the drainage layer 40 to form a drainage layer protection layer 50.

When the installation of the drainage layer protection sheet is completed, a second height adjustment member temporarily coupled so that the drainage layer protection layer pressing flange 152 is in close contact with the top of the drainage layer protection layer 50 according to the height of the drainage layer protection layer 50 Adjust the height of 150.

When the height adjustment of the second height adjustment member 150 is completed, the strainer 170 is seated on the second height adjustment member 150, and then the third height is placed on the upper portion of the second height adjustment member 150. Temporarily couple the adjusting member 160.

In addition, crushed stone is laid on the moisture-permeable layer 30 to form a crushed stone layer 60.

When the formation of the crushed stone layer 60 is completed, the third height adjusting member 160 temporarily coupled so that the crushed stone layer pressing flange 162 is in close contact with the upper end of the crushed stone layer 60 according to the height of the crushed stone layer 60 Adjust the height of

In addition, if the upper nut 163 is fastened to the computing bolt 120 and the third height adjusting member 160 is firmly fixed to the upper portion of the second height adjusting member 150, all construction is completed.

As described above, in the roof on which the roof drain of the flat roof roof of the present invention is installed, and the roof drain for the external insulation drainage plate is installed, rainwater is quickly discharged to the drain 1a through the roof drain, so that indoor leakage is prevented.

That is, the rainwater of the crushed stone layer 60 is the strainer 170 and the third through hole 156 of the second height adjusting member 150 and the third groove 165 of the third height adjusting member 160 The rainwater that has passed through the crushed stone layer 60 does not penetrate into the heat insulating layer 20 by the moisture permeation prevention layer 30 after passing through the drainage layer 40, and the first height adjustment member 140 It is discharged secondarily through the second through hole 146 and the second groove 155 of the second height adjustment member 150.

Even if damage occurs to the moisture permeable layer 30 and rainwater and moisture flow into the insulation layer 20, since the insulation panel is made of a waterproof material, the rainwater and moisture flow into the lower waterproof layer 10, and the lower waterproof layer ( The first through hole 135 of the inner body 131 of the upper body 130 and the first groove 145 of the first height adjusting member 140 without penetration into the concrete slab 1 by 10) It is discharged to the third through

In this way, the roof on which the roof drain of the flat roof of the present invention and the roof drain for the external insulation drainage plate of the present invention are installed is discharged through the roof drain of the present invention for a total of three times, so that there is no concern about leakage defects.

In addition, the present invention adjusts the height of the first height adjustment member 140 according to the heights of the drainage layer 40 and the drainage layer protective layer 50, and according to the height of the heat insulating layer 20 and the moisture permeation prevention layer 30. 2 The height of the height adjustment member 150 is adjusted, and the height of the third height adjustment member 160 can be adjusted according to the height of the crushed stone layer 60, so that the exterior insulation waterproofing construction of the roof is made easy and convenient.

As described above, when a leak occurs on the rooftop constructed according to the present invention, the point of the leak must be the lower waterproof layer 10, so that the cause and point of the leak can be quickly and accurately identified.

In this case, since the operator only needs to remove the crushed stone, the drainage plate and the insulation panel and reinforce the lower waterproof layer 10, unlike the prior art, there is no need to remove the pressed concrete layer 60, so maintenance can be made easily and conveniently at low cost. In addition, it is environmentally friendly as there are no byproducts of demolition of pressed concrete.

In particular, the rooftop constructed according to the present invention greatly improves the durability of the entire building because the weight of the crushed stone layer 60 is significantly lighter than that of the existing pressed concrete layer 60, and the concrete slab by the crushed stone layer 60 Because the heat storage of (1) is prevented, a cool city is created, and the concrete slab (1) is protected from external impact, so the life of the building is prolonged.

As described above, preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above-described embodiments, and those of ordinary skill in the art to which the present invention pertains are modified without departing from the spirit of the present invention. It is possible, and such modifications will fall within the scope of the present invention.

110... lower body 111,131,141,151,161... inner body
112...Mounting flange 120...Computing bolt
130... upper body 132... lower waterproof layer pressing flange
133...bottom nut 135...first through hole
140...1st height adjustment member 142...Moisture prevention layer pressing flange
145...1st groove 146...2nd through hole
150...2nd height adjustment member 152...Drainage layer protective layer Push flange
155...2nd groove 156...3rd through hole
160...3rd height adjustment member 162...crushed stone layer pressing flange
163...top nut 165...third groove
170...strainer

Claims (4)

A lower waterproof layer formed on a concrete slab with a drain hole, an insulating layer formed on the lower waterproof layer, a moisture permeation prevention layer formed on the heat insulating layer, a drainage layer formed on the moisture permeation prevention layer, and a drainage layer protective layer installed on the drainage layer And, in the roof drain for a flat roof roof top floor waterproof, external insulation drain plate installed on a roof having an external insulation waterproof structure including a crushed stone layer formed on the drainage layer protective layer,
A lower body having an inner body inserted into the drain hole, a mounting flange formed outside the inner body and positioned above the concrete slab, and a plurality of computer bolts vertically installed on the inner body;
An upper body having an inner body that passes through the computing bolt and is seated on the upper portion of the lower body, and a lower waterproof layer pressing flange formed on the outside of the inner body and positioned above the lower waterproof layer;
A lower nut fastened to the computational bolt to fix the upper body;
A first height adjustment member having an inner body that passes through the computing bolt and is fitted to be lifted and lowered into the upper body, and a moisture-permeable layer pressing flange positioned above the moisture-permeable layer;
A second height having an inner body that passes through the computational bolt and is fitted to the inside of the first height adjustment member so as to be elevated, and a drainage layer protective layer pressing flange formed on the outside of the inner body and positioned above the drainage layer protective layer Adjusting member;
A third height adjustment having an inner body that passes through the computational bolt so as to be liftably fitted to the inside of the second height adjustment member, and a crushed stone layer pressing flange formed on the outside of the inner body and positioned above the crushed stone layer. absence;
An upper nut fastened to the computational bolt to fix the third height adjustment member; And
A roof drain for a flat roof rooftop exterior waterproofing, exterior insulation drainage plate comprising a strainer fitted and coupled to the inside of the third height adjusting member so that the lower end is seated on the upper part of the inner body of the second height adjusting member. The method of claim 1,
A first through hole is formed at an upper end of the inner body of the upper body to allow moisture located above the lower waterproof layer to flow in;
A first groove portion communicating with the first through hole is formed at a lower end of the first height adjustment member;
A second through hole is formed at an upper end of the first height adjustment member so that moisture located above the moisture permeable layer can be introduced;
A roof drain for a flat roof rooftop with a second groove in communication with the second through hole formed at a lower end of the second height adjustment member, and for external insulation and drainage plates. The method of claim 2,
A third through hole is formed at an upper end of the second height adjustment member to allow moisture located above the drainage layer protective layer to flow;
A lower end of the third height adjustment member, a roof drain for a flat roof rooftop with a third groove in communication with the third through hole, for external waterproofing and external insulation drainage plates. In the method of constructing the roof drain for the external waterproofing and external insulation drainage plate of the flat roof of claim 1,
Fitting the lower body into the drain hole formed in the concrete slab on the roof of the building;
Forming a lower waterproof layer on the upper part of the concrete slab;
Coupling the upper body 130 to the lower body;
A step in which a first height adjustment member is temporarily coupled to an upper portion of the upper body;
Forming a heat insulating layer and a moisture permeable layer over the lower waterproof layer;
Adjusting the height of the first height adjustment member temporarily coupled according to the height of the moisture permeable layer;
Temporarily coupling a second height adjusting member to an upper portion of the first height adjusting member;
Forming a drainage layer and a drainage layer protective layer over the moisture permeation prevention layer;
Adjusting the height of the second height adjusting member temporarily coupled according to the height of the drainage layer protective layer;
Seating a strainer on the second height adjustment member;
Temporarily coupling a third height adjustment member to an upper portion of the second height adjustment member;
Forming a crushed stone layer on the drainage layer protective layer;
Adjusting the height of the combined third height adjustment member according to the height of the crushed stone layer;
A method of waterproofing the rooftop exterior insulation, comprising the step of fixing the third height adjustment member by fastening a nut to the computer bolt.

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