How to repaint exterior walls

Abstract

To restore an existing coated film of an exterior wall to a good state by re-coating.SOLUTION: An exterior wall re-coating method re-coats an exterior wall 2 in which a reinforcement material 13 is mounted along a joint part 12 that is a joint part between exterior wall materials 11, and an existing coated film 6 is formed on the exterior wall materials 11 and the reinforcement material 13. The existing reinforcement material 13 is peeled from the joint part 12, a new reinforcement material 14 is mounted on the joint part 12 from which the existing reinforcement material 13 has been peeled, and the same kind of a coated film 15 for adjustment as the existing coated film 6 is formed on a part mounted with the new reinforcement material 14. A new coated film 21 may be formed on the existing coated film 6 and the coated film 15 for adjustment. The new coated film 21 may be a hard coated film 31.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for repainting an exterior wall. [Background technology]

[0002] When a building such as a house is newly constructed, the exterior walls are painted. Then, as time passes and the building deteriorates, renovations such as repainting the exterior walls are carried out according to the degree of deterioration.

[0003] Such repainting of the exterior walls of buildings is generally carried out by simply applying a new coating over the existing coating film (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-204981 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of Patent Document 1 mentioned above, repainting was done by applying paint over the existing coating film, but if the condition of the existing coating film is poor, there is a risk that the finish will not be satisfactory even if repainting is done on top of the existing coating film.

[0006] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0007] In response to the above problems, the present invention provides: A method for repainting an exterior wall in which a reinforcing material is attached along a joint between exterior wall materials and an existing coating film is formed on the exterior wall material and the reinforcing material, comprising: Peel off the existing reinforcing material from the joint portion, A new reinforcement material is attached to the joint portion from which the existing reinforcement material has been removed, The part where the new reinforcement material is attached a soft coating film having flexibility that elastically deforms in response to the displacement or deformation of the exterior wall material; and a hard coating film that is resistant to the displacement or deformation of the exterior wall material. The present invention is characterized in that a control coating film of the same type as the existing coating film is formed. Effect of the Invention

[0008] According to the present invention, the above-mentioned configuration makes it possible to restore an existing coating film on an exterior wall to a good condition by repainting it. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall side view of a building in which an exterior wall repainting method according to an embodiment of the present invention is carried out. [Diagram 2] FIG. 2 is a cross-sectional view of an exterior wall on which an existing coating film has been formed. [Diagram 3] FIG. 2 is a cross-sectional view showing an exterior wall structure that has been subjected to the exterior wall repainting method according to the present embodiment. [Figure 4] FIG. 11 is a plan view of an exterior wall showing the existing reinforcement material removal process. [Diagram 5] FIG. 5 is a perspective view of an exterior wall showing an existing reinforcement material removing step following FIG. 4. [Figure 6] 1A and 1B are diagrams of an exterior wall illustrating a process for attaching a new reinforcing material, in which (a) is a perspective view of the exterior wall and (b) is a cross-sectional view of the exterior wall. [Figure 7] 7A and 7B are views of an exterior wall showing a new reinforcing material attachment step following that of Fig. 6. In these figures, (a) is a perspective view of the exterior wall, and (b) is a cross-sectional view of the exterior wall. [Figure 8] FIG. 2 is a perspective view of a building for explaining the cause of deterioration of the building. [Figure 9] This is a side view of a building showing the repeated deformation and recovery of an exterior wall material, where (a) shows the state before deformation or the restored state, and (b) shows the deformed state. [Figure 10] This is a side view of a building showing a crack that occurred in a joint in an exterior wall. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the present embodiment will be described in detail with reference to the drawings. 1 to 10 are intended to explain this embodiment. EXAMPLES

[0011] <Configuration> The configuration of this embodiment will now be described.

[0012] For example, when a building 1 such as a house as shown in FIG. 1 is newly constructed, the surface of an exterior wall 2 of the building 1 is painted as shown in the cross-sectional view of FIG.

[0013] Then, when the building 1 deteriorates over time after it is newly constructed, renovations such as repainting the exterior walls 2 are carried out according to the degree of deterioration of the building 1.

[0014] Here, the building 1 may be any type of building, such as a detached house or an apartment building. The building 1 may be of any structure, such as wood, concrete, or steel frame, but is preferably a unit building. A unit building is a building 1 that can be constructed in a short period of time by transporting building units 4 manufactured in advance in a factory to a construction site and assembling them at the construction site. In this embodiment, the building 1 is two-story, with the building unit 4 on the upper floor stacked on top of the building unit 4 on the lower floor. The building 1 may be a single-story building, or a multi-story building with three or more floors.

[0015] The new construction period was when Building 1 was constructed.

[0016] The exterior wall 2 is located on the outdoor side of the building 1 and is the side (outer periphery) of the building 1 facing the outdoor side. The exterior wall 2 has its surface painted to give it an aesthetic appearance and to protect it from ultraviolet rays and wind and rain.

[0017] Deterioration of the building 1 includes, for example, deterioration of the paint (existing paint film 6) due to ultraviolet rays, and cracks (cracks 8) in the paint (existing paint film 6) caused by repeated deformation and recovery of the building 1 due to lateral external forces (lateral forces 7) associated with earthquakes and strong winds.

[0018] Repainting refers to repairing the exterior wall 2 of a building 1, on which an existing coating film 6 has been formed, by applying new paint partially or entirely over time. Repainting can be carried out when the building 1 deteriorates or according to a schedule based on the maintenance plan for the building 1.

[0019] In addition to the basic configuration described above, this embodiment can have the following configuration.

[0020] (1) The method for repainting exterior walls in this embodiment is as follows: As shown in Figure 2, a reinforcing material 13 is attached along joints 12 between exterior wall materials 11, and an existing coating film 6 is formed on the exterior wall material 11 and the reinforcing material 13. The exterior wall 2 is then repainted, for example, as shown in Figure 3 (note that the up-down relationship is reversed between Figures 2 and 3). In this case, in the exterior wall repainting method of this embodiment, at least As shown in FIG. 4 and FIG. 5 , a process of removing the existing reinforcement material 13 from the joint portion 12 (existing reinforcement material removing process); As shown in Figs. 6 and 7, a process of attaching a new reinforcing material 14 to the joint portion 12 from which the existing reinforcing material 13 has been removed (a new reinforcing material attachment process); A process of forming an adjusting coating film 15 (FIG. 3) of the same type as the existing coating film 6 on the portion where the new reinforcing material 14 is attached (adjusting coating film forming process) is carried out.

[0021] Here, the exterior wall material 11 is a construction material that serves as the base for the exterior wall 2 of the building 1. Standard-sized board materials are used for the exterior wall material 11, and it is installed on the building 1 either as is, or after being cut to the required size and shape according to the building 1, or after being appropriately processed, such as drilling holes for openings such as windows. The exterior wall material 11 with the standard dimensions is installed vertically with its longitudinal direction facing up and down. It is preferable that the exterior wall material 11 is installed so that it serves as a load-bearing wall for the building 1.

[0022] The joints 12 are linear joints (joint lines) formed between the side edges of adjacent exterior wall materials 11, and extend in the up-down direction 16. The joints 12 may be installed on the building 1 in a state where adjacent exterior wall materials 11 are directly butted against each other, or may be installed on the building 1 with a gasket interposed between them.

[0023] The positions of the joints 12 are locations where cracks (cracks 8) as shown in FIG.

[0024] Such cracks in the existing coating film 6 occur, for example, due to a lateral force 7 (a lateral external force associated with an earthquake, strong wind, etc.) acting on the building 1 as shown in FIG.

[0025] That is, as shown in Figures 9(a) and 9(b), the above-mentioned lateral force 7 causes the load-bearing walls (exterior wall materials 11 having surfaces parallel to the lateral force 7) constituting the exterior wall 2 of the building 1 to be displaced or deformed laterally, causing adjacent load-bearing walls to slightly shift or return to their original positions along the joints 12 (shift 17). As a result of this small shift 17 movement being repeated over a long period of time, the existing reinforcing materials 13 attached to the joints 12 can no longer withstand it, and as shown in Figure 10, a crack 8 extending in the vertical direction 16 along the joints 12 is generated in the existing coating film 6 at the position of the joints 12.

[0026] The existing reinforcement material 13 is a reinforcing building material attached to the joints 12 of the exterior wall 2 when the building 1 is newly constructed (the existing reinforcement material or the original reinforcement material), and connects the side surfaces of adjacent exterior wall materials 11 to reinforce the joints 12. The existing reinforcement material 13 is in the form of a strip or tape, and is attached along the joints 12 of the exterior wall material 11 over the entire area of ​​the joints 12 in the up-down direction 16. For example, the existing reinforcement material 13 used was one that uses cheesecloth as a base material.

[0027] The existing coating film 6 is a film of paint that is applied and formed on the surface of the exterior wall 2 or the existing reinforcing material 13 when the building 1 is newly constructed (the existing coating film or the initial coating film). The existing coating film 6 is formed in a substantially uniform state on the surface of the exterior wall 2. The existing coating film 6 may be of any type.

[0028] The new reinforcement material 14 is a building material for reinforcing and function recovery, which is attached to the joints 12 of the exterior wall material 11 after removing the existing reinforcement material 13 in place of the existing reinforcement material 13, and restores the protective function of the joints 12 (new reinforcement material or renewal reinforcement material). The new reinforcement material 14 is preferably a strip or tape-shaped material having the same width and thickness as the existing reinforcement material 13. The new reinforcement material 14 is attached along the entire area of ​​the joints 12 in the vertical direction 16 of the exterior wall material 11. The new reinforcement material 14 is preferably a material with the same or higher performance than the existing reinforcement material 13. The new reinforcement material 14 can be an elastic joint tape that releases stress by following deformations such as displacement and dimensional changes of the exterior wall material 11, and further has improved durability against ultraviolet rays and heat. The elastic joint tape is a new material that has been developed in recent years.

[0029] In addition, the replacement with new reinforcement material 14 may be performed only on the existing reinforcement material 13 at the position where the cracked portion 8 actually occurred, or on the existing reinforcement material 13 at the position where the cracked portion 8 actually occurred and at the position where the cracked portion 8 is predicted to occur in the future, or on all of the existing reinforcement materials 13.

[0030] It is preferable to use a new reinforcing material 14 having a mark extending along the longitudinal direction of the new reinforcing material 14, either continuously or discontinuously, at the center position in the width direction, as shown in Figures 6 and 7. The mark can be a colored line, for example, a red line 14a, for easy identification. This red line 14a allows the new reinforcing material 14 to be attached accurately in the correct position along the up-down direction 16 without being misaligned in the width direction relative to the joint portion 12. The new reinforcing material 14 may be in the form of a double-sided tape, with a release film 14b attached to the back side.

[0031] The adjusting coating film 15 is a paint used for partial repainting of the exterior wall 2, and is of the same type as the existing coating film 6. The type of the existing coating film 6 can be identified using data from the time of new construction. If the same type of adjusting coating film 15 as the existing coating film 6 is unavailable, an equivalent substitute is used. The adjusting coating film 15 is formed flush with the remaining existing coating film 6, with no steps, so as to blend in with the existing coating film 6. It is preferable to adjust the color of the adjusting coating film 15 to the same color as the current color of the existing coating film 6.

[0032] When the existing coating film 6 has an exterior wall pattern, the adjusting coating film 15 is finished to have the same exterior wall pattern as the existing coating film 6. The exterior wall pattern is accompanied by a three-dimensional uneven shape, and there are various patterns, such as a stucco pattern obtained by a stucco finish, a sand wall pattern, a wave pattern, a citron skin pattern, and various plastering patterns by trowel marks. By taking the time to provide these exterior wall patterns on the adjusting coating film 15, the adjusting coating film 15 becomes a matching exterior wall pattern of the existing coating film 6.

[0033] The above-mentioned existing reinforcing material removal step is carried out as follows.

[0034] First, a cut line 19 is made in the existing coating film 6 at the joint 12 where the crack 8 has occurred, using a cutting tool 18 such as a utility knife, as shown in Fig. 4. The cut line 19 may be made perpendicular to the exterior wall 2, but it is preferable to make it at an angle so that it faces diagonally inward (Fig. 2).

[0035] The term "diagonally inward" refers to a shape that is inclined in the same position in the up-down direction 16 with respect to a direction perpendicular to the exterior wall 2 as a reference, such that the indoor side of the cut line 19 is located near the joint 12 and the outdoor side of the cut line 19 is located farther from the joint 12, relative to the width direction (horizontal direction) of the exterior wall 2. By forming the cut line 19 diagonally inward in this way, the edge of the existing coating film 6 cut by the cut line 19 has a gradually tapered shape, which allows the adjusting coating film 15 to blend better with the existing coating film 6.

[0036] Two cut lines 19 are formed in the vertical direction 16 approximately along the existing reinforcement 13 at positions on both sides or slightly outside both sides of the existing reinforcement 13 attached to the joint portion 12, so that the width is approximately the same as or slightly wider than the width of the existing reinforcement 13.

[0037] Furthermore, it is preferable to form the cut line 19 over the entire area in the vertical direction 16 of the joint portion 12 of the exterior wall material 11 along the joint portion 12 where the crack portion 8 has occurred, rather than forming it partially around the crack portion 8.

[0038] Next, as shown in Fig. 5, the existing reinforcing material 13 and the existing coating film 6 on the inside of the cut line 19 are simultaneously peeled off from the exterior wall 2 along the cut line 19. At least in the portion of the joint portion 12 in the exterior wall 2 where the crack portion 8 has occurred, the existing reinforcing material 13 is peeled off entirely in the vertical direction 16 without being left behind.

[0039] Furthermore, the existing reinforcement material 13 may be peeled off in the same manner as described above not only for the existing reinforcement material 13 at the position where the cracked portion 8 has occurred, but also for the existing reinforcement material 13 at the position where the cracked portion 8 is predicted to occur in the future, or even for all existing reinforcement materials 13.

[0040] As a result, the peripheral portion of the joint portion 12 at the side edge portion of the exterior wall material 11 where the existing reinforcing material 13 has been peeled off is exposed to the outside over the entire area in the vertical direction 16 of the joint portion 12. Then, the peripheral portion of the joint portion 12 is reset to a state of only the exterior wall material 11.

[0041] Then, preferably, the following base preparation is carried out on the peripheral portion of the joint portion 12 of the exterior wall material 11 from which the existing reinforcing material 13 has been removed (base preparation step).

[0042] First, dust, oil, dirt, etc. adhering to the surface of the exterior wall material 11 exposed by removing the existing reinforcing material 13 are thoroughly removed.

[0043] If the exterior wall material 11 is loose, the loose part is repaired by driving nails into the part at a fine pitch, and an ultraviolet deterioration inhibitor is applied to the joints between the exterior wall materials 11 and to the nail heads. Note that if stainless steel nails are used, it is not necessary to apply an ultraviolet deterioration inhibitor to the nail heads.

[0044] Furthermore, if a gap of, for example, 2 mm or more exists between the butt joints of the exterior wall materials 11, a filler such as a round rod-shaped highly expanded polyethylene filler is inserted into the gap to fill the gap.

[0045] Furthermore, a designated paint may be applied uniformly as an undercoat to the surface of the exterior wall material 11 using a painting tool such as a roller, and then allowed to dry thoroughly.

[0046] The novel reinforcing material attachment step described above is carried out as follows.

[0047] As shown in Fig. 6, the surface of the new reinforcing material 14 without the release film 14b is attached in the up-down direction 16 along the entire area of ​​the joint 12 of the exterior building material 11 while aligning the red line 14a with the center of the joint 12. At this time, the new reinforcing material 14 is pressed firmly against the surface of the exterior building material 11 with a soft cloth such as a rag interposed between them, so that it is sufficiently pressed against the surface of the exterior building material 11, and then the release film 14b is peeled off from the new reinforcing material 14 as shown in Fig. 7.

[0048] It is important to note that the new reinforcing material 14 must be sufficiently pressed, otherwise it may cause blisters in the adjusting coating film 15 later. Be sure to peel off the release film 14b before applying the new reinforcing material 14. If the thickness of the new reinforcing material 14 is not set to match the existing coating film 6, taking into account the thickness of the adjusting coating film 15, it may cause poor appearance in the finished product.

[0049] The above-mentioned adjustment coating film forming step is carried out as follows.

[0050] The same paint as the existing coating film 6 is applied as an adjustment coating film 15 onto the new reinforcing material 14 and onto the tape edges (both side edges) of the new reinforcing material 14 and their surrounding areas.

[0051] The adjusting coating film 15 is carefully applied, particularly targeting the tape edge of the new reinforcing material 14, so that there is no step between the tape edge of the new reinforcing material 14 and the existing coating film 6, and the adjusting coating film 15 is finished smoothly.

[0052] If the existing coating film 6 has an exterior wall pattern, the same exterior wall pattern as the existing coating film 6 is formed on the new reinforcing material 14, and the adjusting coating film 15 is made to match the existing exterior wall pattern. For example, if the existing coating film 6 has a stucco finish, stucco beads are also sprayed onto the adjusting coating film 15 to make the adjusting coating film 15 the same as the stucco finish pattern (stucco-like pattern) of the existing coating film 6. Even if the existing coating film 6 has a different exterior wall pattern, the adjusting coating film 15 is made to match the exterior wall pattern.

[0053] It is important to note that the finished appearance will be poor if the exterior wall patterns of the existing coating film 6 and the adjusting coating film 15 are not matched. The matching of the exterior wall patterns should be done in accordance with the specifications of the existing coating film 6 and other specifications of the building 1.

[0054] In this way, by carrying out each of the above-mentioned steps in order, the exterior wall 2 of the building 1 is restored to the same painted state as when it was newly built. If there are only a few cracks 8 in the existing coating film 6 applied to the exterior wall 2, repainting of the exterior wall 2 may be completed with this partial repair. On the other hand, if there are many cracks 8 in the existing coating film 6 applied to the exterior wall 2 or if the resident requests it, the exterior wall 2 may be further repainted as follows.

[0055] (2) As shown in FIG. 3, a new coating film 21 may be formed on the existing coating film 6 and the adjusting coating film 15 .

[0056] Here, the new coating film 21 is a paint film (new coating film) that is applied over the entire surface of the exterior wall 2 on top of the existing coating film 6 when, for example, the entire building 1 is to be repainted. The new coating film 21 is also applied over the adjusting coating film 15. As a result, the new coating film 21 becomes a topcoat.

[0057] The new coating film 21 may be a single layer coating, but may also be a two-layer coating in which an undercoat coating film 22 and a topcoat coating film 23 are superimposed, or a multi-layer coating of three or more layers in which an intermediate coating film is added between the undercoat coating film 22 and the topcoat coating film 23. For example, a urethane-based or silicone-based soft paint can be used for the undercoat coating film 22, the topcoat coating film 23, or the intermediate coating film. The soft paint is a paint that has the flexibility to elastically deform in response to the displacement or deformation of the exterior wall material 11 due to the above-mentioned lateral force 7.

[0058] (3) The new coating film 21 may be a hard coating film 31.

[0059] Here, for example, a fluorine-based paint can be used for the hard coating film 31. In the case of multi-layer coating, the hard coating film 31 can be used at least for the top coating film 23. The undercoat coating film 22 and the intermediate coating film may be the hard coating film 31, or may be a soft coating film made of a soft paint.

[0060] Even when a hard coating film 31 is used for the new coating film 21, the protective function for the joints 12 is restored by the new reinforcing material 14, and by using, for example, an elastic joint tape with higher performance than the existing reinforcing material 13 for the new reinforcing material 14 to strengthen the protective function for the joints 12 compared to when the building was new, the hard coating film 31 can withstand the above-mentioned displacement and deformation of the exterior wall material 11 for a long period of time.

[0061] (4) The exterior wall structure formed by the above exterior wall repainting method is as follows: A new reinforcing material 14 is attached along the joints 12 where the exterior wall materials 11 join together. The existing coating film 6 remains on the portion of the exterior wall material 11 other than the joint portion 12. An adjusting coating film 15 of the same type as the existing coating film 6 is formed on the portion where the new reinforcing material 14 is attached.

[0062] Here, it is necessary to restore the protective function of the joints 12 by reliably removing the existing reinforcing material 13 and replacing it with new reinforcing material 14. It is effective to carry out the above-mentioned base treatment around the joints 12 from which the existing reinforcing material 13 has been removed in order to restore the protective function and perform repainting well.

[0063] The new reinforcing material 14 is attached along the joints 12 of the exterior wall material 11 from which the existing reinforcing material 13 has been completely removed, over the entire area of ​​the joints 12 in the vertical direction 16. It is also important that the adjusting coating film 15 has the same exterior wall pattern as the existing coating film 6, so as to blend in with it, in order to prevent any influence from the existing coating film 6. The color and exterior wall pattern of the adjusting coating film 15 are adjusted so as to blend in with the current existing coating film 6.

[0064] As a result, the existing coating film 6 remains on the surface of the exterior wall 2 as if it had been there for the same number of years as the building 1, while the adjusting coating film 15 and the new coating film 21 are newly formed on the surface of the exterior wall 2 around the joints 12 as if they had been newly applied during the renovation, so that the coating films with different ages (the existing coating film 6 and the adjusting coating film 15) are mixed together and assimilated into the exterior wall 2.

[0065] As described above, a new coating film 21 may be formed on the entire surface of the exterior wall 2 on top of the existing coating film 6 and the adjusting coating film 15, depending on the degree of deterioration of the building 1 and the requests of the residents. The new coating film 21 may be a single layer coating, but may also be a multi-layer coating of two or more layers, with an undercoat coating film 22 and a topcoat coating film 23 superimposed on each other.

[0066] In addition, the new coating film 21 may be a hard coating film 31 .

[0067] The rest of the process can be the same as that described in the above-mentioned exterior wall repainting method.

[0068] <Effects> According to this embodiment, the following effects can be obtained.

[0069] (Function and effect 1) In the exterior wall repainting method of this embodiment, the existing reinforcing material 13 is peeled off from the joint area 12, and a new reinforcing material 14 is attached to the joint area 12 after the existing reinforcing material 13 has been peeled off, and an adjusting coating film 15 of the same type as the existing coating film 6 is formed in the area where the new reinforcing material 14 is attached.

[0070] As a result, the area around the joints 12, which are the most susceptible to deterioration in the existing coating film 6, is repaired with new reinforcing material 14, and the joints 12 are restored to the same protective function as they were initially (at the time of new construction) by the new reinforcing material 14. In this case, for example, if a new reinforcing material 14 with higher performance than the existing reinforcing material 13 is used, it is possible to strengthen the joints 12 by providing them with a protective function that is greater than that of the original.

[0071] In addition, by repairing the joints 12 with new reinforcing material 14 and adjusting coating film 15, the paint on the exterior wall 2 is restored to a state in which the adjusting coating film 15 and the existing coating film 6 are integrated so that it is indistinguishable between the existing coating film 6 remaining on the surface of the exterior wall 2 and the adjusting coating film 15 newly applied to the joints 12.

[0072] And, removing the existing reinforcing material 13 from the joints 12 is a considerably time-consuming task, and thus has not been carried out up until now. However, removing the existing reinforcing material 13 from the joints 12 not only eliminates the adverse effects that would occur after repainting by leaving the existing reinforcing material 13 in the joints 12, but is also effective in restoring the protective function of the joints 12 with new reinforcing material 14 and in smoothly repainting the adjusting coating film 15 on the new reinforcing material 14. Thus, by carrying out the above-mentioned exterior wall repainting method, the exterior wall 2 is returned (restored) to a state equivalent to that at the time of new construction when it was covered with the existing coating film 6.

[0073] (Effect 2) A new coating film 21 may be formed so as to straddle the existing coating film 6 and the adjusting coating film 15 (whose protective function has been restored to the same state as when the building was newly constructed and which has been assimilated into the existing coating film 6). This allows the existing coating film 6 and the adjusting coating film 15 to be completely covered and hidden by the new coating film 21. The new coating film 21 can be formed satisfactorily over the entire surface of the exterior wall 2 in a state in which it is unlikely to be affected by the existing coating film 6 and the adjusting coating film 15.

[0074] (Effect 3) Although the hard coating film 31 is a paint that is relatively susceptible to the influence of the base, the hard coating film 31 may be applied as a new coating film 21 to the exterior wall 2 repaired with the adjusting coating film 15 so that the influence of the existing coating film 6 is less likely to occur. This makes it possible to form the hard coating film 31 on the entire surface of the exterior wall 2 without any problems even if the hard coating film 31 is used as the new coating film 21.

[0075] (Function and Effect 4) The exterior wall structure of this embodiment may be an exterior wall 2 repainted by the above-mentioned exterior wall repainting method. In this exterior wall 2, new reinforcing material 14 is attached along the joints 12 that are the joints between exterior wall materials 11, the existing coating film 6 remains on the parts of the exterior wall material 11 other than the joints 12, and an adjusting coating film 15 of the same type as the existing coating film 6 is formed on the part where the new reinforcing material 14 is attached. As a result, the protective function of the joints 12 is restored by the new reinforcing material 14, and the adjusting coating film 15 is blended with the existing coating film 6 so that it is indistinguishable from the existing coating film 6, so that the same function and effect as the above-mentioned exterior wall repainting method can be obtained. [Explanation of symbols]

[0076] 1. Building 2. Exterior Wall 6 Existing coating 11 Exterior wall materials 12 Joint 13 Existing reinforcement 14 New reinforcement material 15 Adjustment coating film 21 New coating 31 Hard coating

Claims

1. A method for repainting an exterior wall in which a reinforcing material is attached along a joint between exterior wall materials and an existing coating film is formed on the exterior wall material and the reinforcing material, comprising: Peel off the existing reinforcing material from the joint portion, A new reinforcement material is attached to the joint portion from which the existing reinforcement material has been removed, This method of repainting exterior walls is characterized by forming, on the portion where the new reinforcing material is attached, an adjustment coating of the same type as the existing coating, either a soft coating film that has the flexibility to elastically deform in response to the displacement or deformation of the exterior wall material, or a hard coating film that can withstand the displacement or deformation of the exterior wall material.

2. The method for repainting an exterior wall according to claim 1, A method for repainting exterior walls, comprising forming a new coating film on the existing coating film and the adjusting coating film.

3. The exterior wall repainting method according to claim 2, A method for repainting exterior walls, characterized in that the new coating film is a hard coating film.

4. An exterior wall structure subjected to the exterior wall repainting method according to any one of claims 1 to 3, New reinforcement materials were installed along the joints between the exterior wall materials, The existing coating film remains in the portion of the exterior wall material other than the joint portion, An exterior wall structure characterized in that an adjusting coating of the same type as the existing coating is formed in the portion where the new reinforcing material is attached, either a soft coating film that has the flexibility to elastically deform in response to the displacement and deformation of the exterior wall material, or a hard coating film that can withstand the displacement and deformation of the exterior wall material.

Images