JPH093359A - Spray coating material for building and method for spray-coating building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the formation of a large pattern having low reproducibility, uniqueness or novelty and the ability to be discerned even from a distant place by sending a specified spray coating material to the position of coating by means of a feeder and spraying the material with compressed air. SOLUTION: 100kg of a base comprising 10-65 pts.wt. synthetic emulsion, 30-75 pts.wt. main aggregate comprising an inorganic solid, 1-15 pts.wt. cement component and 5-30 pts.wt. water is mixed with 5-50l of a particulate foam material comprising 0-50l of a lightweight aggregate and 0-50l of a particulate foam plastic to obtain a spray coating material. This material is sent from a hopper 3 through a feeder 2 to a distant nozzle gun 1. The compressed air generated by an air compressor is sent to the flow path 12 of the gun 1, the piston within the gun 1 is retracted to open its opening 11, and the material is sprayed through the opening 11 of an aperture of 15-30mm onto the building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray material for buildings and a spray coating method for buildings. More specifically, the present invention relates to a spray material for a building that forms a large pattern having poor reproducibility and a spray coating method for the building.

[0002]

2. Description of the Related Art From the viewpoint of beauty and protection of the main body of a wall surface of a building, the outer surface is covered with a thin plate of natural stone or metal, a pseudo natural stone pattern, or spray coating. Is being done. Here, the building means not only the constructed material but also building materials such as blocks, panels and boards used for the building. Also, except for those that place a certain pattern such as sticking,
Unless otherwise specified, the work of applying a pattern or the like to a building surface using a fluid material is called painting or application.

Conventionally, as a method for applying a pattern or the like to the outer surface of a building, for example, a lysine-based material (compound containing an aggregate) and a paint-based material are trowel coating method, roller coating method,
It is applied by a spray coating method or the like. The trowel coating method is a method of transferring a material to the surface of a building with a trowel and extending it, and the roller coating method is a method of transferring the material to the surface of a building with a roller or a trowel and extending it with a roller. Since these are manual operations, large patterns can be formed, but they are not suitable for thick coating or large-area coating. In the spray coating method, the force of compressed air is used to eject material from a spray gun for coating. Here, in the lysine-based material coating method, since the material is composed of granular materials such as natural stone, ceramics, fired aggregate, synthetic resin emulsion, paint, etc.
Thick coating up to g / m ² ) can be applied.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned conventional method of coating a building, particularly the spray coating method, a material is supplied at a spray gun and is jetted by compressed air. Therefore, it is not a composition that uses a large amount of materials,
It was not possible to form a large pattern. for that reason,
If you look at a painted building from a distance, small color and pattern changes will be inconspicuous except for joints, and it will become a uniform, single-color, non-patterned surface, only the colors will be different, and the originality of the pattern will disappear. It was a thing.

Also, in the appearance of the marble pattern spraying method as shown in FIG. 4, the white stone 42, the gray stone 43, and the black stone 44 are mixed, giving the impression that marble is used. However, the appearance itself did not seem to be novel. However, reference numeral 41 in the figure is a joint.

[0006] Therefore, the present inventor has completed the present invention as a result of researching a method of applying a building which has a poor reproducibility of the pattern and gives a novel feeling that can discriminate the difference even from a distance. It is a thing.

The present invention has been made in view of the above problems, and an object of the present invention is to coat a building in a size that has poor reproducibility and can discriminate the difference from a distance. A spraying material for a building used in and a method for spraying a building.

[0008]

In order to solve the above-mentioned problems, the spraying material for buildings of the present invention comprises a synthetic resin emulsion of 10 to 65 parts by weight and an inorganic solid of 30 to 75 parts by weight. Parts and 1 to 15 parts by weight of cement component,
Main material consisting of 5 to 30 parts by weight of water, and 100 kg of the main material
5 to 50 liters of the granular foam material are included.

As the resin of the synthetic resin emulsion, acrylic resins, vinyl acetate resins, vinylidene chloride resins, vinyl chloride resins, SBR resins, and various other resins are used. The reason why the synthetic resin emulsion is 10 to 65 parts by weight is that if the amount is less than 10 parts by weight, the weight will not be reduced and the coating will be difficult and the decorative property will be deteriorated. If the synthetic resin emulsion exceeds 65 parts by weight, the heat resistance becomes poor. A more preferable ratio of the synthetic resin emulsion is 15 to 50 parts by weight, depending on the synthetic resin.

As the main aggregate composed of an inorganic solid, silica sand, talc, tankar, bentonite, mineral fibers, synthetic fibers or the like may be used alone or in a mixture. The reason why the proportion of the main aggregate is set to 30 to 75 parts by weight is that if it is less than 30 parts by weight, the heat resistance is deteriorated and a large and unique pattern cannot be formed. The main aggregate is 7
If it exceeds 5 parts by weight, it becomes too heavy and it becomes difficult to paint, and a large unique pattern cannot be formed, resulting in poor decorativeness. A more preferable ratio of the main aggregate is 40 to 65 parts by weight, depending on the components.

As the cement component, various binders such as white cement, Portland cement, polymer-cement system, gypsum and dolomite plaster can be used. The amount of cement used is 1 to 15 parts by weight.
If it is less than 1 part by weight, the bonding strength may be insufficient, and if it exceeds 15 parts by weight, the curing speed is generally too fast and work may not be possible.

[0012] The amount of water is such that it does not deteriorate during storage, can be easily coated during work, and the curing period is not too long. Therefore, 5 to 30 parts by weight of the main material is included. Since it is preferable to reduce the weight during transportation, it can be added at the construction site and not at the factory.

As the granular foam material, for lightweight aggregate, any of expanded particles such as pearlite and shirasu balloon or porous particles can be used. In the granular foamed plastic, expanded granules of various synthetic resins such as polystyrene resin and polyurethane resin are used.

An inorganic coloring pigment may be added at the shipping stage, or a white pigment such as titanium oxide, lithobon, or zircon oxide may be added so that coloring can be easily performed.

In the structure of the spraying material, it is preferable that the granular foam material comprises 0 to 50 liters of lightweight aggregate and 0 to 50 liters of granular foamed plastic per 100 kg of the main material. Granular foam material is 5 to 50 per 100 kg of main material
The reason for setting the volume to liters is that if the volume is less than 5 liters, the weight reduction is insufficient, and if the volume exceeds 50 liters, the strength and appearance may be deteriorated.

Further, in the composition of the spraying material, 0.1 to 10 parts by weight of additives such as an antifoaming agent, a preservative and a fungicide are contained with respect to 100 parts by weight of the main material. Is preferred.

In the structure of the spray material, it is preferable that the main aggregate contains talc. Further, in the structure of the spray material, it is preferable that the synthetic resin emulsion is an acrylic resin emulsion and the lightweight aggregate includes a shirasu balloon.

The method of spray coating a building according to the present invention comprises a synthetic resin emulsion, a main aggregate composed of an inorganic solid, and
A cement component, water, and a spray material for buildings, which is made of a granular foam material, are mixed in a predetermined ratio to mix the spray material, and the mixed spray material is applied by a supply device, which is separated from the mixing device. Then, the spray material is ejected from the nozzle by the compressed air at the coating position to be attached to the building.

In the spray coating method, the pressure of the compressed air is preferably ² to 10 kg / cm ² . Further, in the spray coating method, it is preferable to apply the spray material in an amount of 3 to 25 kg / m ² .

In the spray coating method, the spray material is 10 to 65 parts by weight of the synthetic resin emulsion, and 30 to 75 parts by weight of the main aggregate made of an inorganic solid.
A main material consisting of 1 to 15 parts by weight of a cement component and 5 to 30 parts by weight of water, and 5 granular foam materials per 100 kg of the main material.
It is preferable to use one containing about 50 liters.

Further, in the spray coating method, it is preferable that most of the spray material is sprayed in a lump having a diameter (corresponding to a volume) of 3 to 50 mm for coating. Further, in the spray coating method, most of the plane area of the spray material sprayed on the building is (corresponding to an area) a diameter of 10 to 110 m.
m is preferable.

In the spray coating method, it is preferable to flatten the deposited spray material to a thickness of 2 to 50 mm with a roller or a grinder. Also,
In the spray coating method, it is preferable to apply an undercoat to the surface of the spray material that has been attached.

In the spray coating method, it is preferable to apply a top coat to the surface or undercoat surface of the spray material that has been attached. As the undercoat, various resin-based paints such as acrylic resin-based paints, styrene-butadiene latex, vinyl resin-based paints, urethane resin-based paints, chlorinated rubber-based paints, styrene-butadiene latex paints, etc., rubber or resin-rubber-based paints Various paints such as paints are used, and it is preferable to use paints having high elasticity and viscosity. The construction amount is 0.2 to 1.5 kg / m ^2.
Apply. As the top coat, a fluororesin-based, acrylic-resin-based, silicon-resin-based, urethane-resin-based, vinyl chloride-resin-based paint or the like is used, and 0.2 to 1.5 kg / m ²
Apply.

The spraying material for buildings of the present invention comprises 10 to 65 parts by weight of a synthetic resin emulsion, 30 to 75 parts by weight of a main aggregate made of an inorganic solid, 1 to 15 parts by weight of cement, and 5 parts by weight of water. To 30 parts by weight, and the main material 100
It comprises 5 to 50 liters of granular foam material per kg. Therefore, since the specific gravity can be appropriately adjusted and reduced by the granular foam material, thick coating can be performed even in spray coating, and a large pattern can be formed. Further, the spraying material layer is made dense by the synthetic resin emulsion, the curing speed of the spraying material is set by cement so that the workability is not impaired, and the workability is good by water so that the curing period does not become too long. By spray coating using this spray material, the pattern produced is poor in reproducibility, and when formed large, the difference can be identified even from a distance.

According to a preferred example of the above-mentioned spraying material, in which the granular foam material is composed of 0 to 50 liters of lightweight aggregate and 0 to 50 liters of granular foamed plastic per 100 kg of the main material, in addition to the above-mentioned action, more heat resistance is obtained. It is easy to make adjustments such as increasing the heat resistance or sacrificing heat resistance to some extent to reduce the weight.

In the spray material, the main material 1
According to a preferable example in which 0.1 to 10 parts by weight of an additive such as an antifoaming agent, an antiseptic agent and a fungicide is contained with respect to 00 parts by weight, workability can be improved in addition to the above-mentioned action. It is possible to perform spray coating that is more realistic and can improve durability.

Further, in the spraying material, according to a preferred example in which the main aggregate contains talc, in addition to the above-mentioned action, it is possible to easily form a pattern with higher decorativeness. Further, in the configuration of the spray material, according to a preferred example in which the synthetic resin emulsion is an acrylic resin emulsion and the lightweight aggregate includes a shirasu balloon,
In addition to the above effects, it is possible to form a highly decorative pattern having excellent heat resistance.

The method of spraying a building according to the present invention is a method of spraying a building resin comprising a synthetic resin emulsion, a main aggregate made of an inorganic solid, a cement component, water, and a granular foam material. To adjust the spraying material, send the spraying material to the coating position separated from the mixing device by the transfer means, and eject the spraying material by the compressed air from the nozzle at the coating position to construct the building. To adhere to. Therefore, at the coating position, the lightweight spray material sent may be sprayed only by holding the nozzle, so that the workability is good and an arbitrary large spray pattern can be formed. Particularly, it is easy to form a novel pattern by intermittently spraying the spray material. The timing of opening and closing the spraying may be, for example, 1 second open to 1 second closed or less or longer, and is not particularly limited in terms of patterning with poor reproducibility. However, in terms of durability of the switching mechanism, a unit of several seconds is preferable.

In the spray coating method, according to a preferred example in which the pressure of the compressed air is ² to 10 kg / cm ² , a large amount of spray material can be surely sprayed. Large patterns can be formed.

Further, in the spray coating method, according to a preferred example of coating the spray material with 3 to 25 kg / m ² , in addition to the above-mentioned action, a large pattern can be formed more easily, It can be applied thickly.

In the spray coating method, the spray material is 10 to 65 parts by weight of an acrylic resin emulsion, and 30 to 75 parts by weight of a main aggregate made of an inorganic solid.
A main material consisting of 1 to 15 parts by weight of a cement component and 5 to 30 parts by weight of water, and 5 granular foam materials per 100 kg of the main material.
According to the preferable example using a thing containing ~ 50 liters, the above-mentioned action can be easily achieved even by an inexperienced contractor.

Further, in the spray coating method, according to a preferred example in which the spray material is mostly sprayed in a lump having a diameter of 3 to 50 mm, the coating is novel and irreproducible. The pattern can be easily formed on the outer surface.

Further, in the spray coating method, according to a preferred example in which most of the plane area of the spray material sprayed on the building has an equivalent diameter of 20 to 100 mm, a novel, distant, non-reproducible method. The outer surface can have a large pattern that is easily visible.

Further, in the spray coating method, a preferable example in which the deposited spray material is flattened to a thickness of 2 to 50 mm by a roller or a grinder is also not reproducible, and it is noticeable from a distance. The outer surface can have a large pattern.

According to a preferred example of applying the undercoat to the surface of the applied spray material in the spray coating method, it is possible to form a pattern having excellent durability in addition to the above-mentioned function. It is useful to set the coating amount to 0.3 to 3 kg in terms of decorativeness and durability, and it is particularly preferable to set the coating amount to 0.5 to 1.5 kg.

According to a preferred example of applying the top coat to the surface or the undercoat surface of the applied spray material in the above spray coating method, in addition to the above action, a pattern having good durability is formed. be able to. It is useful to set the coating amount of this top coat to 0.1 to 1.5 kg from the viewpoint of decorativeness and durability.
It is preferably set to 0.8 kg.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to embodiments. First, a spray material was prepared with the following components. In the examples below, examples of the defoaming agent, antiseptic / antifungal agent, etc. include defoaming agents, antiseptic / antifungal agents, as well as thickeners, pH adjusters, coating film forming aids, pigments, plasticizers. There are agents, thickeners, etc., which may or may not be included as appropriate. Acrylic resin emulsion is used as the synthetic resin emulsion, talc and a mixture of glass fibers are used as the main aggregate, and white cement is used as the cement.
As the granular foam material, granular foamed styrene having a particle size of 0.4 mm was used. (Example 1) Main material: Acrylic resin emulsion; 65 parts by weight Main aggregate consisting of inorganic solids; 30 parts by weight cement; 1 part by weight water; 5 parts by weight Defoaming agent, antiseptic / mold inhibitor, etc .; 1 part by weight Part Lightening agent: Granular foam material; 10l / 100k of main material
g (Example 2) Main material: Acrylic resin emulsion; 10 parts by weight Main aggregate made of inorganic solid; 75 parts by weight Cement; 1 part by weight water; 10 parts by weight Antifoaming agent, antiseptic, fungicide, etc .; 1 Part by weight Special agent (Shirasu balloon); 4 parts by weight Lightening agent: Granular foam material; 15l / 100k of main material
g (Example 3) Main material: Acrylic resin emulsion; 35 parts by weight Main aggregate composed of inorganic solid; 50 parts by weight Cement; 1 part by weight water; 10 parts by weight Antifoaming agent, antiseptic, fungicide, etc .; 1 Weight part Lightening agent: Granular foam material; 30l / 100k of main material
g (Example 4) Main material: Acrylic resin emulsion; 20 parts by weight Main aggregate made of inorganic solid; 75 parts by weight Cement; 1 part by weight water; 5 parts by weight Defoaming agent, antiseptic / fungistatic agent, etc .; 1 Weight part Lightening agent: Granular foam material; 15l / 100k of main material
g According to the above-mentioned examples, patterns having poor reproducibility and originality or novelty could be easily formed.

Next, referring to FIG.
A method for spraying and applying a spraying material having the above composition to a building will be described. FIG. 1 is a flowchart showing a schematic configuration of an apparatus used for carrying out the spraying method of the present invention.

In FIG. 1, reference numeral 1 denotes a nozzle gun, and a spraying material prepared by a hopper is pressure-fed to the nozzle gun 1 from a supply device 2, where the spraying material is sprayed with compressed air and coated on a wall surface.

The nozzle gun 1 has a nozzle opening 11 having a diameter of about 15 to 30 mm, and has a needle valve system for opening and closing the nozzle opening 11 by advancing and retracting the injection nozzle. A double-structured injection nozzle (not shown) is attached to the piston, and the piston moves forward or backward by switching the switching valve 4 to block or carry out the injection of the spray material by the compressed air and the compressed air. The spraying of the spraying material can be performed intermittently in an appropriate cycle.

When the switching valve 4 is operated by a flow switch (not shown) to let compressed air flow through the flow path 12, the nozzle gun 1
The piston inside is retracted to the right in FIG. 1, and the injection nozzle attached to the piston is interlocked to the right, that is, retracted,
The nozzle opening 11 is opened. At the same time, the compressed air flowing through the flow path 12 flows through the flow path 15 and is supplied to the operating portion of the cutoff valve 5 to open the cutoff valve 5 and the compressed air supply path 6 and the compressed air supply path 14 to the injection nozzle. And the compressed air is ejected from the compressed air supply passage 14 through the ejection nozzle and the nozzle opening 11. At this time, since the nozzle opening 11 is opened, the spray material is supplied to the nozzle opening 11,
This is ejected by the compressed air supplied from the ejection nozzle and jumps out. In this case, the nozzle has a diameter of 15 to 30.
Since the diameter of the sprayed material is increased to about mm, the equivalent diameter of the spray material that is jetted and jumps out is several mm to several tens of mm, which is larger than the conventional one, and most of the equivalent diameter when it collides with the surface to be coated. Is as large as 20 to 100 and 10 mm.

The hopper 2 stores the spray material having the above composition and may have a capacity of 100 kg or an appropriate size. It is preferable that the hopper 2 has a kneading device or a kneading mechanism so as to mix the material with the spray material having the above-mentioned composition.

The spray material supply device 3 supplies the spray material to the conduit 7.
It is necessary to be able to supply to the spray gun. The supply amount is 20 A to 50 A and the ability to feed the conduit 7 at 2 to 20 l / min. Depending on the composition of the spraying material, a piston type, a snake type, a squeeze type or the like can be used. In the spraying material of the present invention, the snake type is preferable because a fixed amount can be fed without blockage.

Compressed air is generated by an air compressor (not shown) and supplied to the nozzle gun 1. It is preferable that the air compressor is provided side by side with or adjacent to the spraying material supply device 3 because the operation management of these is facilitated. It is preferable that the air compressor is provided near the blowing material supply device 3 and the compressed air supply path 6 and the conduit 7 are provided side by side up to the nozzle gun 1. In the composition of the present invention, a pressure of compressed air of ^{2 to} 10 kg / cm ² can be used, and in order to inject a large amount of lumps of 10 to 40 mm with an injection amount of about 5 to 25 kg / m ² , 2 -10kg
/ Cm ² pressure is effective, preferably 3-8 kg
/ Cm ² pressure, 4 to obtain a crushed pattern
A pressure of -10 kg / cm ² is preferred.

Using the apparatus configured as described above, the spraying material having the composition of Examples 1 to 4 was compressed with compressed air having a pressure of 4 kg / cm ² from a nozzle gun having a diameter of 20 mm to about 10 mm.
After spraying with an injection amount of 15 kg / m ² and drying for 3 days,
The result of polishing the surface to a thickness of about 15 mm with a grinder and sketching the flat surface and the cut end surface is shown in FIG. From this result, the pattern flattened by the grinder has an equivalent diameter of 2
Most of them were about 0 to 100 mm and about 50 mm.

As shown in FIG. 2, convex patterns 22, 23, 2
In No. 4, although a plurality of spray particles were combined, the equivalent diameter was about 30 to 80 mm, and the convex pattern 25 was about 20 mm. When this was observed at a distance of several tens of meters, the polished surface was clearly visible. This pattern had poor reproducibility and could be said to be original or novel. In FIG. 2, 21 is a joint, 26, 27
Is a concave portion.

The spray materials having the compositions of Examples 1 to 4 were sprayed with a compressed air having a pressure of 6 kg / cm ² from a nozzle gun having a diameter of 20 mm at an injection rate of about 3 to 4 kg / m ² , and dried for 3 days. A spray surface having a thickness of several mm to 30 mm was obtained. The result of sketching the plane and the cut end face of this surface is shown in FIG. As shown in FIG. 3, convex patterns 32, 33, 3
In Nos. 4 and 36, a plurality of sprayed particles bubbled, but the equivalent diameter is about 30 to 80 mm, and the convex pattern 35 is about 20 m.
m. In FIG. 3, 31 is a joint and 37 is a recess.

From these results, it can be said that the unevenness is large, and when observed at a distance of several tens of meters, it can be recognized quite clearly, the reproducibility is poor, and the originality or novelty is present.

After the pattern was formed by spraying and drying as described above, a paint or a colored pattern was applied to the surface, and a top coat and a top coat were sequentially applied on the surface to complete the outer surface finish. Acrylic paint was used as the undercoat, and acrylic-silicone paint was used as the topcoat.

[0050]

As described above, according to the spraying material and the spray coating method for a building of the present invention, the reproducibility is poor, the originality or the novelty is exhibited, and the identification is possible even at a distance of several tens of meters. A large pattern can be easily formed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an apparatus used in one embodiment of a spray material coating method of the present invention.

2A and 2B are a plan view and an end view showing an example of a pattern sprayed by using a spraying material and a coating method of the present invention.

FIG. 3 is a plan view and an end view showing an example of a pattern sprayed by using the spraying material and the coating method of the present invention.

FIG. 4 is a plan view and an end view showing a pattern in which a conventional artificial stone is formed by a spraying material.

[Explanation of symbols]

 1 Nozzle Gun 3 Hopper 2 Spraying Material Supply Device (Pump) 4 Switching Valve 5 Shutoff Valve 6 Compressed Air Supply Path 7 Conduit 11 Nozzle Opening 12 Flow Path 14 Compressed Air Supply Path 15 Flow Path

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area C08K 3/00 KAA C08K 3/00 KAA 3/34 KAH 3/34 KAH C08L 33/08 LJG C08L 33 / 08 LJG 101/00 101/00 C09D 1/08 PCP C09D 1/08 PCP 5/02 PPT 5/02 PPT PPU PPU E04F 13/02 8913-2E E04F 13/02 A 8913-2E B

Claims (14)

[Claims] 1. A synthetic resin emulsion in an amount of 10 to 65 parts by weight, and an inorganic solid main aggregate in an amount of 30 to 75 parts by weight,
A main material consisting of 1 to 15 parts by weight of a cement component and 5 to 30 parts by weight of water, and 5 granular foam materials per 100 kg of the main material.
~ 50 liters of building spray material. 2. The granular foam material is 0-50 liters of lightweight aggregate and 100% of granular foam plastic per 100 kg of the main material.
The spray material for a building according to claim 1, which comprises 50 liters. 3. An antifoaming agent based on 100 parts by weight of the main material,
The spray material for a building according to claim 1 or 2, which comprises 0.1 to 10 parts by weight of an additive such as an antiseptic agent and an antifungal agent. 4. The main aggregate includes talc.
The spray material for the building according to any one of 1. 5. The spray material for a building according to claim 1, wherein the synthetic resin emulsion is an acrylic resin emulsion, and the lightweight aggregate includes a shirasu balloon. 6. A spraying material obtained by mixing a synthetic resin emulsion, a main aggregate made of an inorganic solid, a cement component, water, and a spraying material for a building, which is made of a granular foam material, at a predetermined ratio. And the mixed spraying material is sent to a coating position separated from the mixing device by a supply device, and the spraying material is jetted by compressed air from a nozzle at the coating position to adhere to a building. . 7. The pressure of the compressed air is 2 to 10 kg / c.
The spray coating method according to claim 6, wherein m ² is set. 8. The amount of the spray material is 3 to 25 kg / m ^2.
The spray coating method according to claim 6, wherein coating is performed. 9. The synthetic resin emulsion 1 is used as the spray material.
0-65 parts by weight and a main aggregate 30 made of an inorganic solid 30-
75 parts by weight, cement components 1 to 15 parts by weight, and water 5 to
7. A main material composed of 30 parts by weight, and 5 to 50 liters of the granular foam material per 100 kg of the main material.
9. The spray coating method according to any one of 8 above. 10. Most of the spray material has an equivalent diameter of 3 to 50.
10. A slab of mm which is sprayed and applied.
The spray coating method according to the item. 11. The spray coating method according to claim 6, wherein most of the plane area of the spray material sprayed on the building has an equivalent diameter of 20 to 110 mm. 12. The thickness of the attached spray material is 2 to 5
7. Flatten to 0 mm with a roller or grinder.
12. The spray coating method according to any one of 1 to 11. 13. The spray coating method according to claim 6, wherein an undercoat is applied to the surface of the spray material adhered. 14. The spray coating method according to claim 13, wherein a top coat is applied to the surface or the undercoat surface of the spray material adhered.