JP5360641B2 - Manufacturing method of outer heat insulation panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an external heat insulating panel that ensures ventilating performance without a problem of moisture permeability, dew condensation, or the like, even if mounted to the external wall surface of concrete to construct a wet process external facing material. <P>SOLUTION: The external heat insulating panel 10 is provided with an external facing backing layer 13 on the outdoor side surface of a heat insulating panel 11 of foam plastic to construct external facing materials 2, 3. Venting grooves 12 are formed opened to the outdoor side surface of the heat insulating panel 11, and styrene paper 13 is heat-fused to the heat insulating panel 11 while covering the venting grooves 12 to form the external facing backing layer. A venting layer is secured with these venting grooves 12, and the styrene paper 13 covering the venting layer prevents a coating material, mortar, or the like from entering the venting grooves 12 to allow construction of the wet process external facing materials 2, 3. Heat fusion of the styrene paper 13 also simplifies mounting of foam plastic to the heat insulating panel 11. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a method for manufacturing a panel for external heat insulation, which is attached to a building such as reinforced concrete so that external heat insulation can be provided with a ventilation layer, and in particular, wet exterior materials such as paint and mortar are applied. Can prevent moisture permeability and condensation problems.

  2. Description of the Related Art Conventionally, in buildings such as reinforced concrete apartment buildings and office buildings, heat insulation work is being popularized to increase heat insulation by covering the outer wall portion and roof portion in contact with outside air with a heat insulating material for energy saving and comfortable living.

  There are two methods of heat insulation for concrete buildings: an inner heat insulation method in which a heat insulating material is provided on the inside of a wall surface and an outer heat insulation method in which a heat insulating material is provided on the outer surface of the wall surface. It has become.

  Recently, improvement of heat insulation performance for buildings has been demanded, and instead of the conventional inner heat insulation method, an outer heat insulation method of covering the outside of the wall surface with a heat insulating material tends to be employed.

The conventional exterior insulation method for concrete buildings mainly employs a so-called wet method in which a heat insulating material is attached to the concrete wall surface, and a wet exterior material such as mortar or paint is applied to the outdoor side of the heat insulating material. Because of this, there are several decades of construction experience.
If a ventilation groove is formed in such a heat insulating material, a mortar to be applied and the like will block the ventilation groove, so that a wet outer heat insulation method provided with a ventilation layer is not widespread.

  However, if we try to adopt a wet external heat insulation method without a ventilation layer in cold regions, depending on the type of exterior paint, mortar, or insulation used, the inflowed wet flow is confined within the heat insulation structure, and the accumulated wet flow Will cause condensation and eventually cause serious problems such as frost damage that freezes and expands.

  For this reason, in the conventional wet external heat insulation method, in order to prevent moisture flow from the room, in consideration of the moisture permeability resistance of the heat insulating material, mortar, and paint, the material is selected by selecting a material that gradually decreases the moisture permeability resistance. It was necessary to be able to discharge the wet stream to the outside air.

In addition, a tiled outer heat insulation method (Patent Document 1) and an exterior material construction method (Patent Document 2) excellent in waterproofness and moisture permeability have been proposed.
JP2003-119997A Japanese Patent Laid-Open No. 2004-92312

However, there are not so many types of exterior paints, mortars, and heat insulating materials with such a low moisture resistance, and even if they are combined, the usage conditions differ depending on the cold region, and the construction of paints and mortars There is a problem that the moisture permeation resistance value varies depending on the thickness.
In addition, the tiled outer heat insulation method (Patent Document 1) and the exterior material construction method (Patent Document 2), which are excellent in waterproofness and moisture permeability, are not always sufficient, such as the construction of the heat insulating panel and the manufacturing process of the panel itself. Improvement is desired.

The present invention has been made in view of the above-mentioned problems and demands of the prior art, and even if it is attached to the outer wall surface of concrete and a wet exterior material is applied, there is no problem of moisture permeability or condensation, and air permeability is ensured. An object of the present invention is to provide a method for manufacturing a panel for external heat insulation.

In order to solve the above-described problems of the prior art, a method for manufacturing an external heat insulation panel according to claim 1 of the present invention is an external heat insulation in which an exterior base layer is provided on the outdoor surface of a foamed plastic thermal insulation panel to construct an exterior material. A method for producing a panel for use in the present invention , wherein a styrene paper having a hole of 0.5 to 2.0 mm is set in a mold that is opened on the outdoor side surface of the heat insulation panel to form a ventilation groove. The mold frame is filled with pre-foamed styrene beads, heated and integrated, and the ventilation groove is covered with the styrene paper to form an exterior base layer .

Furthermore, the manufacturing method of the panel for external heat insulation of Claim 2 of this invention adds the structure of Claim 1 , and the tape form or heat insulation which covers the said styrene paper which covers the said groove | channel for ventilation | gas_flowing, and each said groove | channel for ventilation | gas_flowing. It is characterized by being formed into a sheet shape covering the entire surface of the panel.

The method according to claim 3 external insulation panel according to the present invention, in addition to the configuration of claim 1, wherein the cross-sectional shape of the ventilation groove is substantially circular, substantially elliptical, substantially rectangular, substantially It is any one of trapezoids.

Furthermore, in the manufacturing method of the panel for external heat insulation of Claim 4 of this invention, in addition to the structure in any one of Claims 1-3 , the said groove | channel for ventilation is arrange | positioned at least to the vertical direction at the time of outer wall construction. At the same time, it is formed and configured to be arranged in a lateral direction and / or an oblique direction.

According to the manufacturing method of the external insulation panel of claim 1, wherein the present invention, in the manufacturing method of the outer heat-insulating panels for construction of the outer package is provided an outer base layer outdoor side surface of the insulating panel of foam plastics, the Styrene beads pre-foamed in this mold by setting styrene paper with holes of 0.5-2.0 mm in the mold that opens on the outdoor surface of the heat insulation panel and forms a ventilation groove In order to cover the ventilation groove with the styrene paper and form an exterior base layer , the styrene paper is set in a mold for forming the ventilation groove, and pre-expanded styrene beads are used. When filling and heating and integrating, the passage of vapor can be secured by the holes formed in the styrene paper, and the outer heat insulation panel with the ventilation groove with the groove opening closed with styrene paper is easy in one step It can be molded.
In addition, the ventilation layer can be secured by the ventilation groove, and it is possible to apply wet exterior materials by preventing the paint and mortar from entering the groove with the styrene paper covering it, and by heat-sealing the styrene paper It is easy to install foamed plastic insulation panels.
By using this panel for thermal insulation, it can be constructed by the same construction method as the conventional wet thermal insulation method without a ventilation layer, does not require new construction technology, and can be provided with a ventilation layer. There is no need to select wet exterior materials such as moisture permeation resistance, and the problem of condensation and frost damage can be solved even in cold districts.

Furthermore, according to the method for manufacturing an outer heat insulation panel according to claim 2 of the present invention, the styrene paper covering the ventilation groove is formed into a tape shape covering each ventilation groove or a sheet shape covering the entire surface of the heat insulation panel. Since the styrene paper covering the ventilation groove is either a tape shape covering each groove opening or a sheet shape covering the entire panel surface, the ventilation groove is blocked with paint, mortar, etc. Can be prevented, and a ventilation layer can be secured.

According to the method for manufacturing an outer heat insulation panel according to claim 3 of the present invention, the cross-sectional shape of the ventilation groove is substantially circular, substantially elliptical, substantially rectangular, or substantially trapezoidal. In addition, the air permeability can be ensured, and in particular, the substantially circular, substantially elliptical, or substantially trapezoidal shape that can reduce the opening width can more reliably prevent the styrene paper from being bent at the groove portion.

Furthermore, according to the method for manufacturing an outer heat insulation panel according to claim 4 of the present invention, the ventilation grooves are arranged at least in the vertical direction during construction of the outer wall, and are arranged in the horizontal direction and / or the oblique direction. Since it is formed and configured as described above, any of a ventilation groove by a combination of the vertical direction and the horizontal direction, a ventilation groove by a combination of the vertical direction and the diagonal direction, and a ventilation groove by a combination of the vertical direction, the horizontal direction and the diagonal direction In addition, even if openings such as windows are on the concrete outer wall surface, it is possible to arrange the heat insulation panel by communicating the ventilation groove, and it is possible to ensure air permeability even if the heat insulation panel is cut and joined. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 relates to an embodiment of a method for manufacturing an outer heat insulating panel of the present invention, and is a plan view showing only the outer heat insulating panel and the manufactured outer heat insulating panel in a state where the manufactured outer heat insulating panel is applied to a concrete building frame. FIG.
This panel for external heat insulation can be used as an external heat insulation panel that can be installed on the surface of a concrete frame of a concrete building at the same time as external heat insulation construction with a ventilation layer and installation of exterior base materials. Used as a formwork for building a concrete frame of a building, by placing an inner mold and assembled concrete and leaving it as it is, a heat insulation panel with exterior base material and ventilation layer is attached to the surface of the concrete frame It can also be used as a panel for external heat insulation that can also be used as a mold.
For example, as shown in FIG. 1 (a), an exterior heat insulating panel 10 is attached to the surface of an existing concrete frame 1 in the vertical and horizontal directions, and an exterior base layer 13 covering a ventilation groove 12 formed in the heat insulating panel 11 is installed. It is used as a panel for a wet external heat insulation method in which mortar is directly applied to the outside or mortar part 2 is applied with mortar applied through a mesh or the like, and coating part 3 is provided on mortar part 2 as required. .

  For example, as shown in FIG. 1B, the outer heat insulating panel 10 is formed on a heat insulating panel 11 of hard foamed plastic, for example, foamed polystyrene (EPS, XPS), and on the outdoor side surface of the heat insulating panel 11 of the hard foamed plastic. And a styrene paper 13 that is attached by heat-sealing (heat-sealing layer 14) so as to cover the ventilation groove 12 formed by opening, so that the styrene paper 13 becomes an exterior base layer. . A plurality of ventilation grooves 12 formed by opening on the outdoor side surface of the heat insulation panel 11 are formed as vertical ventilation grooves 12a along the vertical direction, for example.

A hard foam plastic heat insulation panel 11 constituting the composite panel for heat insulation 10 is a foam plastic panel formed of a thermoplastic resin or a thermosetting resin material having a high heat insulation effect. Polyurethane foam, polyethylene foam, polypropylene foam, phenol foam, etc. can be used, but since it is attached to the outer surface of concrete as an external insulation method, moisture content contained in the concrete can be permeated. An excellent material is preferable, and a hard polystyrene foam bead method that allows easy groove processing of the ventilation groove 12 by molding is preferable.
According to this rigid polystyrene foam of the bead method, water does not pass but moisture flow (water vapor and humidity) passes, and the moisture permeability coefficient is about 60 to 200 ng / m2sPa, and the moisture permeability coefficient of concrete is 15 Compared to ~ 30 ng / m2sPa, the moisture permeability is excellent.

Further, the ventilation groove 12 formed by opening on the surface on the outdoor side of the heat insulating panel 11 is not limited to the case where a plurality of vertical ventilation grooves 12a in the vertical direction are formed, but as shown in FIG. , The horizontal ventilation groove 12b is formed in addition to the vertical ventilation groove 12a to form the ventilation groove 12, or as shown in FIG. 3, the horizontal ventilation groove 12b and the diagonal ventilation are added to the vertical ventilation groove 12a. The ventilation groove 12 may be formed by forming the groove 12c.
Such a combination of a vertical ventilation groove and a horizontal ventilation groove, a combination of a vertical ventilation groove and a diagonal ventilation groove, a vertical ventilation groove and a horizontal ventilation groove. By configuring the ventilation groove 12 with any of the combinations of the ventilation grooves in the oblique direction, the ventilation groove 12 can be communicated even if the heat insulation panel 11 is cut and used for construction reasons. In particular, it is possible to ensure air permeability even when construction is performed in a state where the upper end is closed by an opening such as a window.

The ventilation groove 12 of the hard foam plastic heat insulation panel 11 is covered with styrene paper 13 so as to close the opening, and is heat-sealed to the surface of the heat insulation panel 11 and fixed with the heat-fusion layer 14. In this way, even if a wet exterior material such as paint or mortar is applied to the outdoor side surface on which the ventilation groove 12 is formed, the ventilation groove 12 is not blocked or narrowed to ensure air permeability. In addition, the adhesiveness of the mortar part 2 by the mortar applied directly or through the mortar applied through the mesh can be enhanced.
Moreover, the heat insulation strength by the same material can be ensured by making the heat insulation panel 11 foam polystyrene, and the exterior base layer which closes the ventilation groove | channel 12 is styrene paper 13, and it attaches easily by heating. It is possible to form a heat insulating panel 11 having a ventilation groove 12 by filling a mold with styrene paper, filling pre-expanded expanded polystyrene beads, and heating the styrene paper to block the ventilation groove 12. The attachment of 13 can be performed by one-step molding.
The styrene paper 13 is not limited to being provided so as to cover the entire surface of the heat insulating panel 11 as shown in FIGS. 1 (a) and 1 (b), but as shown in FIG. A tape-like styrene paper 13A may be provided so as to cover each, and heat-sealed.

Further, the cross-sectional shape of the ventilation groove 12 is not limited to the rectangular shape shown in FIGS. 1 to 4, and as shown in FIG. 5, the substantially trapezoidal ventilation with the opening side narrowed in an inversely tapered shape. The groove 12A can be used as the groove 12A or a substantially elliptical ventilation groove 12B shown in FIG. 6C, and other cross-sectional shapes such as a substantially circular shape (not shown) may be used.

As the styrene paper 13 that is heat-sealed to close the opening of the ventilation groove 12 of the heat insulation panel 11 of the outer heat insulation panel 10, bubbles are generated by kneading a foaming agent in polystyrene resin and heat extrusion molding. The sheet made is good, can have a thickness of 0.5 to 3 mm, and a density of 80 to 120 kg / m 3, and the surface is roughened by surface treatment such as punching unevenness or buffing. This improves the adhesive strength. Moreover, the adhesive force of a mortar can be improved further by using aqueous epoxy for a mortar.
The evaluation of the specifications of the styrene paper was performed on a rectangular cross section having a groove width of 20 to 30 mm and a groove depth of 10 mm, and mortar as a mortar portion on the outer surface of the styrene paper. An aqueous epoxy mortar, a resin emulsion mortar, and the like were applied to a thickness of 10 mm.

According to such an outer heat insulating panel 10, the ventilation groove 12 is formed by opening on the outdoor surface of the heat insulation panel 11, and the styrene paper 13 is heat-sealed to the heat insulation panel 11 so as to cover the ventilation groove 12. Since the outer layer is an exterior base layer, a ventilation layer can be secured by the ventilation groove 12, and a wet exterior material can be applied by preventing paint or mortar from entering the groove 12 with the styrene paper 13 covering the ventilation layer. In addition, it is possible to easily attach the foamed plastic to the heat insulating panel 11 by thermally fusing the styrene paper 13.
By attaching and using this outer heat insulating panel 10 to the concrete frame 1, it can be constructed by the same construction method as the conventional wet outer heat insulation method without a ventilation layer, and does not require new construction technology, and the ventilation groove 12 Since an air-permeable layer can be provided, there is no need to select wet exterior materials such as mortar and paint due to moisture permeability resistance, and there is no problem of condensation or frost damage even in construction in cold regions.

  Further, according to the outer heat insulating panel 10, the heat insulating panel 11 is formed of foamed styrene beads and the styrene paper 13 is formed with a hole of 0.5 to 2.0 mm. When the styrene paper 13 is set in the mold to be formed, filled with pre-foamed styrene beads, and heated and integrated, steam can be passed through the holes formed in the styrene paper 13. It is possible to easily form the outer heat insulation panel 10 including the ventilation groove 12 that blocks the opening of the groove 12 in one step.

  Further, according to the outer heat insulation panel 10, the styrene paper 13 covering the ventilation grooves 12 of the heat insulation panel 11 is replaced with the tape-shaped styrene paper 13 A covering each ventilation groove 12 or the sheet shape covering the entire surface of the heat insulation panel 11. Since the styrene papers 13 and 13A covering the ventilation grooves 12 are either tape-like or sheet-like, the ventilation grooves 12 are prevented from being blocked with paint or mortar. Thus, a ventilation layer can be secured on the outer heat insulating panel 10.

  Moreover, according to this outer heat insulation panel 10, since the cross-sectional shape of the ventilation groove 12 is any one of a substantially rectangular shape 12, a substantially trapezoidal shape 12A, a substantially elliptical shape 12B, and a substantially circular shape, the outer heat insulation panel 10 can be used in any case. In addition, a substantially trapezoidal shape 12A, a substantially elliptical shape 12B, or a substantially circular shape that can reduce the opening width that is blocked by the styrene paper 13 can be further improved by bending the styrene paper 13 at the groove portion. It can be surely prevented.

  Further, according to the panel 10 for heat insulation, the ventilation groove 12 is arranged in the transverse direction with the longitudinal ventilation groove 12a and / or the diagonal ventilation groove 12a arranged at least in the longitudinal direction when the outer wall is constructed. Since the oblique ventilation grooves 12c arranged in the direction are formed, the ventilation grooves 12a, 12b by a combination of the vertical direction and the horizontal direction, the ventilation grooves 12a, 12c by the combination of the vertical direction and the diagonal direction, The ventilation groove 12 can be formed by any of the ventilation grooves 12, 12 a, 12 b, 12 c by the combination of the direction, the lateral direction, and the diagonal direction, even if the opening such as the window is on the outer wall surface of the concrete housing 1. The outer heat insulation panel 10 can be arranged in communication with each other, and even when the outer heat insulation panel 10 is cut and joined, the ventilation groove 12 is communicated to allow ventilation. It can be ensured.

In the above embodiment, using a styrene paper 13 for closing the opening of the ventilation groove 12 of the insulation panel 11 of the outer heat-insulating panel 10, it has been to attach by heat sealing, styrene as reference example Instead of the paper 13, a glass mesh can be adhered to the heat insulating panel to form an exterior base layer. In this case, since the mortar leaks into the ventilation groove depending on the roughness of the glass mesh, it is sufficient to use a mortar that does not leak, for example, a thickness of 0.2 to 0.35 mm. , And a lattice size of 0.5 × 0.5 to 2 mm.
In addition, when an epoxy or urethane adhesive is applied to a glass mesh, the thickness is 0.35 mm, and the lattice size is 1.5 × 1.5 to 10 × 10 mm. Examples include those coated with m2 epoxy or urethane adhesive.
Furthermore, instead of applying an epoxy or urethane adhesive, it is also possible to use a material in which a polypropylene non-woven fabric is thermally fused to a glass mesh so that leakage of mortar does not occur. And a non-woven polypropylene nonwoven fabric having a basis weight of 16 g / m @ 2 or more and having a lattice size of 5.times.5 mm.
The evaluation of the specification of the glass mesh was performed on a rectangular cross section having a groove width of 10 to 30 mm and a groove depth of 10 mm.
Also with such an external heat insulation panel of the reference example, it is possible to prevent the wet exterior material from entering the ventilation groove by the adhesion of the glass mesh, and it is possible to perform the external insulation work including the ventilation groove.

Next, another reference example of the outer heat insulating panel of the present invention will be described with reference to FIG.
As shown in FIG. 6, the outer heat insulating panel 10 </ b> A is integrally formed of the same material as the heat insulating panel 11 made of foamed styrene, with the outer surface underlayer 15 made of foamed styrene, instead of the styrene paper of the exterior underlayer. Grooves 12 are formed inside the foamed styrene 11 and 15, and the exterior base layer 15 constituting the outdoor side surface of the heat insulation panel 11 is also used as a part of the heat insulation panel 11.
Also with this outer heat insulation panel 10A, the ventilation groove 12 is provided by forming the ventilation groove 12 inside the heat insulation panels 11 and 15 and forming the exterior base layer 15 constituting the outdoor side surface of the heat insulation panel 11. It is possible to construct a panel for external heat insulation, which can also be applied to the external heat insulation method using a wet exterior material. Can be improved.
In the case of the outer heat insulating panel 10A, the ventilation groove 12 is not limited to a rectangular cross section, and as shown in FIG. 6B, as shown in a substantially trapezoidal shape 12A or FIG. 6C. The shape may be substantially circular or substantially oval 12B, and is not limited to the longitudinal ventilation groove, but may be a combination of a lateral ventilation groove and / or an oblique ventilation groove.

In the case of the outer heat insulating panel 10A, the thickness of the exterior base layer 15 in the outer portion of the ventilation groove 12 integral with the heat insulation panel 11 is sufficient if the mortar portion 3 can be constructed without at least the ventilation groove 12 being crushed. For example, when the ventilation groove 12 has a rectangular cross section with a groove width of 20 mm, at least a thickness of 2 mm or more is required, and the ventilation groove 12 has a trapezoidal cross section with a groove width of 16 mm or a circular or elliptical shape with a diameter or major axis of 10 mm. In the case of a cross section, the thickness may be 1 mm or more.
When the thickness of the exterior base layer 15 is less than 1 mm, the styrene beads are not filled in the mold without any gap, and when it is too thick, it is wasted.

  Such an external heat insulation panel 10A can be formed by setting a core corresponding to a ventilation groove in a mold, filling and heating and foaming styrene beads, and then removing the core. It can be manufactured by preparing a rigid foamed plastic panel integrated with the exterior base layer 15 and forming a through hole corresponding to a ventilation groove with a drill or the like, or an outer heat insulating panel as shown in FIG. 10 exterior base material 13 can be formed by affixing a hard foamed plastic of the same material as the heat insulating panel 11, and examples of the hard foamed plastic include extruded foamed styrene (XPS), beaded polystyrene foam (EPS), and hard Examples thereof include urethane foam, phenol foam, and foamed polyethylene.

  In the above embodiment, the case where the outer heat insulation panel is attached to the existing concrete wall surface has been described as an example. However, it can also be used as a formwork combined panel used also as a formwork for concrete placement. In this case, by using the outer heat insulation panel that is long in the vertical direction as much as one placement height, it is possible to reduce the horizontal joint portion and facilitate the construction. Furthermore, if a step is formed on the joint part to which the outer heat insulation panel is connected, and it is connected so as to be engaged, the construction of the concrete to be placed is prevented from leaking and the construction is easily performed. be able to.

According to one embodiment of the method for manufacturing an outer heat insulating panel of the present invention, a flat sectional view showing the manufactured outer heat insulating panel in a state of being applied to a concrete building frame and a flat sectional view of only the outer heat insulating panel It is. It is the cross-sectional view and BB arrow line view of the manufactured panel for external heat insulation concerning other one Embodiment of the manufacturing method of the panel for external heat insulation of this invention. It is the cross-sectional view and BB arrow line view of the manufactured panel for external heat insulation concerning other one Embodiment of the manufacturing method of the panel for external heat insulation of this invention. It is a cross-sectional view of the manufactured panel for external heat insulation concerning one Embodiment of the manufacturing method of the panel for external heat insulation of this invention. It is a cross-sectional view of the manufactured panel for external heat insulation concerning each further another embodiment of the manufacturing method of the panel for external heat insulation of this invention. It is a plane sectional view shown in the state where it applied to the reference example of the panel for outside heat insulation , and was constructed in the frame of a concrete building, and the plane sectional view only of the panel for outside heat insulation.

10, 10A Outside heat insulation panel 11 Hard foam plastic insulation panel 12 Ventilation groove 12A Substantially trapezoidal ventilation groove 12B Substantially elliptical ventilation groove 12a Vertical ventilation groove 12b Horizontal ventilation groove 12c Diagonal ventilation groove 13 Styrene paper (exterior underlayer)
13A Tape-like styrene paper 14 Thermal fusion layer 15 Exterior base layer (integrated heat insulation panel)
1 Concrete frame 2 Mortar part (wet exterior material)
3 Painted part (wet exterior material)

Claims (4)

A method for manufacturing an outer heat insulation panel in which an exterior base layer is provided on the outdoor side surface of a foamed plastic heat insulation panel to construct an exterior material,
A styrene paper having a 0.5 to 2.0 mm hole set in a mold that is opened on the outdoor side surface of the heat insulation panel to form a ventilation groove, and styrene is pre-foamed in the mold A method for producing an outer heat insulating panel , wherein beads are filled, heat integrated, and the ventilation groove is covered with the styrene paper to form an exterior base layer . 2. The outer heat insulating panel according to claim 1 , wherein the styrene paper covering the ventilation grooves is formed in a tape shape covering each ventilation groove or a sheet shape covering the entire surface of the heat insulation panel. Production method. 3. The method for manufacturing an outer heat insulating panel according to claim 1, wherein a cross-sectional shape of the ventilation groove is substantially circular, substantially elliptical, substantially rectangular, or substantially trapezoidal . Said vent groove is at least vertically while being arranged in a direction, transversely and / or form to be placed in an oblique direction, characterized by being configured according to claim 1, wherein when the outer wall construction Of manufacturing a panel for external heat insulation.

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