Thermal insulation renovation methods and thermal insulation renovation structures

Abstract

This invention provides an insulation renovation method and insulation renovation structure that can reduce the construction load on existing floor structures. [Solution] An insulation renovation method for installing new insulation material 50 on an existing floor structure 10 of a building, comprising: a removal step of forming a removal section 62 by removing the portion 61 of the new insulation material 50 that corresponds to the horizontal members included in the existing floor structure 10; and a placement step of moving the new insulation material 50 from below and fitting the horizontal members into the removal section 62 to position the new insulation material 50 on the existing floor structure 10.

Description

Technical Field

[0001] The present invention relates to a heat insulation renovation method and a heat insulation renovation structure for attaching a new heat insulation material to an existing floor structure of a building.

Background Art

[0002] Conventionally, a technique for attaching a heat insulation material to a floor structure of a building has been known. For example, it is as described in Patent Document 1.

[0003] In Patent Document 1, a method is disclosed in which both ends of a floor heat insulation material are hung on a large brace and the floor heat insulation material is arranged between adjacent joists.

[0004] However, in the method described in Patent Document 1, it is necessary to cut the floor heat insulation material so that it can be arranged between adjacent joists. That is, since it is necessary to cut the floor heat insulation material by the number between the joists and further fix each of the cut floor heat insulation materials, the construction load is large. Moreover, the method described in Patent Document 1 originally assumes a new floor structure and assumes the attachment of a floor heat insulation material in a state where the floor material is not installed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a heat insulation renovation method and a heat insulation renovation structure that can reduce the construction load on an existing floor structure.

Means for Solving the Problems

[0007] ]>The problems that this invention aims to solve are as described above, and the means for solving these problems will now be explained.

[0008] That is, claim 1 is an insulation renovation method for installing new insulation material in an existing floor structure of a building, comprising: a removal step of forming a removal section by removing the portion of the new insulation material that corresponds to the horizontal members included in the existing floor structure; and a placement step of moving the new insulation material from below and fitting the horizontal members into the removal section to position the new insulation material in the existing floor structure.

[0009] Claim 2 comprises a preparation step for preparing the new thermal insulation material, wherein the new thermal insulation material is composed of a plurality of laminated, substantially plate-shaped thermal insulation materials.

[0010] In claim 3, the horizontal member includes joists on which flooring materials included in the existing floor structure are placed.

[0011] In claim 4, the removal portion is formed to be recessed downward from the upper surface of the new insulation material, corresponding to the vertical length of the joist.

[0012] In claim 5, the horizontal member includes a main beam on which the joists included in the existing floor structure are supported.

[0013] In claim 6, the removal portion is formed by removing the lower portion from both ends of the new insulation material in the longitudinal direction of the joist, leaving the upper portion, and in the placement step, the new insulation material is placed between adjacent joists in the longitudinal direction of the joist, and the upper portion is placed on the joist.

[0014] In claim 7, during the arrangement step, the new insulation material is elastically deformed such that the upper portions of both ends pass between the adjacent main beams from below.

[0015] In claim 8, it is a heat insulation renovation structure in which a new heat insulation material is attached to an existing floor structure of a building. The new heat insulation material has a removal part where a corresponding part of the new heat insulation material with a cross member included in the existing floor structure is removed, and is arranged on the existing floor structure in a state where the cross member is fitted into the removal part.

Effect of the Invention

[0016] As an effect of the present invention, the following effects are achieved.

[0017] In the present invention, the construction load can be reduced for the existing floor structure.

Brief Description of the Drawings

[0018] [Figure 1] A schematic cross-sectional view showing a heat insulation renovation structure employing a heat insulation renovation method according to an embodiment of the present invention. [Figure 2] A schematic cross-sectional view showing an example of an existing floor structure. [Figure 3] Similarly, a schematic plan view. [Figure 4] A flowchart showing the procedure of the heat insulation renovation method according to the first embodiment. [Figure 5] (a) An explanatory view showing the preparation process in the heat insulation renovation method according to the first embodiment. (b) Similarly, an explanatory view showing the removal process. (c) Similarly, an explanatory view showing the continuation of the removal process in Fig. 5(b). [Figure 6] (a) Similarly, an explanatory view showing the placement process. (b) Similarly, an explanatory view showing the continuation of the placement process in Fig. 6(a). (c) Similarly, an explanatory view showing the fixing process. [Figure 7] A plan explanatory view showing a heat insulation renovation structure constructed by the heat insulation renovation method according to the first embodiment. [Figure 8] A flowchart showing the procedure of the heat insulation renovation method according to the second embodiment. [Figure 9] (a) An explanatory view showing the preparation process in the heat insulation renovation method according to the second embodiment. (b) Similarly, an explanatory view showing the removal process. (c) Similarly, an explanatory view showing the continuation of the removal process in Fig. 9(b). [Figure 10] (a) Similarly, an explanatory diagram showing the placement process. (b) Similarly, an explanatory diagram showing the continuation of the placement process in Fig. 10(a). (c) Similarly, an explanatory diagram showing the continuation of the placement process in Fig. 10(b). [Figure 11] A plan explanatory diagram showing the heat insulation repair structure constructed by the heat insulation repair method according to the second embodiment.

Mode for Carrying Out the Invention

[0019] Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the figures will be defined as the upward, downward, forward, backward, leftward, and rightward directions, respectively, for the explanation.

[0020] First, using Fig. 1, the outline of the heat insulation repair structure 100 according to the first embodiment of the present invention will be explained.

[0021] The heat insulation repair structure 100 according to the present embodiment is a structure newly formed by performing heat insulation repair on the floor structure of an existing building. Here, heat insulation repair is a repair (reform) performed to improve the heat insulation performance of an existing building as a whole or partially. In the present embodiment, the existing building is an existing wooden house (hereinafter simply referred to as "house"). Also, in the heat insulation repair according to the present embodiment, the heat insulation performance of the floor of this house is improved. Also, the floor structure of this house will be hereinafter referred to as the "existing floor structure 10".

[0022] First, hereinafter, the existing floor structure 10 of the house will be explained using Figs. 2 and 3.

[0023] As shown in Figs. 2 and 3, the existing floor structure 10 of the house includes an earth slab 11, floor joists 12, floor beams 13, large purlins 14, floor materials 15, and an existing heat insulation material 16. In Fig. 3, mainly the floor beams 13 and large purlins 14 are shown, and the illustration of other members is appropriately omitted.

[0024] The floor slab 11 is formed to cover the entire lower part of the underfloor space. The floor support members 12 are erected from the floor slab 11. In this embodiment, the floor support members 12 are made of steel.

[0025] The main beam 14 is a wooden horizontal member that spans horizontally. The main beam 14 rests on the floor support 12. Multiple main beams 14 are provided and arranged parallel to each other with their longitudinal direction facing a predetermined horizontal direction (front-to-back direction in this embodiment). The joists 13 are wooden horizontal members that span horizontally. The joists 13 rest on the main beam 14. Multiple joists 13 are provided and arranged parallel to each other. The joists 13 are arranged with their longitudinal direction facing a horizontal direction (left-to-right direction in this embodiment) perpendicular to the longitudinal direction of the main beam 14.

[0026] The flooring material 15 is exposed to the interior space and forms the floor surface. The flooring material 15 is placed on the joists 13. The flooring material 15 is made up of multiple laminated components. For example, the flooring material 15 is made up of a base made of particleboard or the like, a subfloor plywood, and a finishing material made of flooring material or the like.

[0027] The existing insulation material 16 is a roughly plate-shaped member with thermal insulation properties. The existing insulation material 16 is made of, for example, fibrous material such as rock wool or glass wool, or resin material such as polystyrene foam. As shown in Figure 2, the existing insulation material 16 is installed below the floor material 15 and in contact with the floor material 15. As shown in Figure 3, the existing insulation material 16 is fitted between adjacent joists 13. In a plan view, the existing insulation material 16 extends in the left-right direction and is installed so as to straddle one or more main beams 14. The lower surface of the existing insulation material 16 is installed at a higher position than the lower surface of the joist 13 (i.e., the upper surface of the main beam 14). In this way, a predetermined gap is formed between the lower surface of the existing insulation material 16 and the upper surface of the main beam 14.

[0028] In the following, the thermal insulation renovation method and thermal insulation renovation structure 100 according to the first embodiment will be described in detail using the flowcharts in Figures 1 and 4, and Figures 5 to 7.

[0029] Please note that the diagrams show each component schematically, and therefore the dimensions and shapes of each component may not necessarily match. Also, for the sake of clarity, the following explanation may describe a configuration in which the existing insulation material 16 is omitted as appropriate.

[0030] The flowchart shown in Figure 4 illustrates, for example, the steps taken by a worker in the thermal insulation repair method according to the first embodiment. The thermal insulation repair method includes a preparation step (step S11), a removal step (step S12), a placement step (step S13), and a fixing step (step S14).

[0031] The preparation step (step S11) shown in Figure 5(a) is a step of preparing the new insulation material 50. The new insulation material 50 according to this embodiment is composed of several (five in this embodiment) substantially plate-shaped insulation materials 51, each having thermal insulation properties, which are laminated together. The five insulation materials 51 are bonded together using, for example, an adhesive, to form a single unit (as the new insulation material 50). The insulation material 51 is composed of, for example, fibrous materials such as rock wool or glass wool, or resin materials such as polystyrene foam. The insulation material 51 is composed of a relatively rigid material.

[0032] The removal process (step S12) shown in Figures 5(b) and (c) is the process of removing the portion 61 of the new insulation material 50 that corresponds to the joists 13 (horizontal members) of the existing floor structure 10. The portion of the new insulation material 50 from which the corresponding portion 61 has been removed will be referred to as the "removed portion 62" below. The removed portion 62 is the portion into which the joists 13 will be inserted in the placement process (step S13), as will be described later. The corresponding portion 61 is the portion in which the joists 13 and the new insulation material 50 overlap when the new insulation material 50 is placed in relation to the existing floor structure 10.

[0033] Specifically, in the removal process (step S12), the worker first makes cuts 63 from the top surface downwards of the new insulation material 50 using a tool such as a cutter, as shown in Figure 5(b). The cuts 63 are formed at positions corresponding to the front and rear surfaces of the corresponding joists 13. In a plan view, the cuts 63 are formed in a straight line in the left-right direction (along the longitudinal direction of the joist 13) (not shown).

[0034] The depth (vertical length) of the cut 63 is determined by a first setting and a second setting based on the first setting. The first setting is determined according to the size of the portion of the joist 13 that will be inserted into the removal section 62 in the placement process (step S13) described later. In this embodiment, since the entire joist 13 is inserted into the removal section 62 (see Figure 6(e)), the first setting is determined to be the same as the height (vertical length) of the joist 13.

[0035] Furthermore, the second setting for the depth of the cut 63 is determined to be greater than or equal to the depth determined in the first setting. Specifically, with respect to the five stacked insulation materials 51 (which constitute the new insulation material 50), the second setting is determined to be greater than or equal to the depth of the first setting, and closest to the depth of the first setting, out of a total of four possible depths D1 to D4 (see Figure 5(b)) from the top surface of the new insulation material 50 to the top surface of each insulation material 51 in the vertical direction. In this embodiment, as shown in Figure 5(b), the depth D3 from the top of the new insulation material 50 to the top surface of the fourth insulation material 51 is determined to be the second setting (i.e., the final depth of the cut 63).

[0036] Thus, in the removal process (step S12), after making the cut 63 with a depth D3 as described above, the worker then removes the corresponding portion 61 from the new insulation material 50 as shown in Figure 5(c). Here, the new insulation material 50 is bonded to each other using adhesive as described above. The worker then inserts a predetermined tool into the cut 63 and applies force to peel off the bond between the third and fourth insulation material 51 from the top of the new insulation material 50, thereby separating and removing the corresponding portion 61 from the new insulation material 50.

[0037] As a result, a portion of the new insulation material 50 from which the corresponding portion 61 has been removed (removed portion 62) is formed. That is, the removed portion 62 is formed to be recessed downward from the upper surface of the new insulation material 50 so as to correspond to the vertical length of the joist 13 (more specifically, the vertical length of the portion of the joist 13 that is inserted into the removed portion 62).

[0038] The placement process (step S13) shown in Figures 6(a) and (b) is the process of placing the new insulation material 50 on the existing floor structure 10. First, as shown in Figure 6(a), the worker places the new insulation material 50 below the existing floor structure 10 and then moves it upward. Then, as shown in Figure 6(b), the worker places the new insulation material 50 by fitting the joist 13 into the removal section 62 of the new insulation material 50 from below.

[0039] The fixing process (step S14) shown in Figure 6(c) is the process of fixing the new insulation material 50 to the existing floor structure 10. As shown in Figure 6(c), the worker drives screws B from below the new insulation material 50 toward the joists 13 located in the removal section 62. This fixes the new insulation material 50 to the existing floor structure 10. Once the fixing process is completed, the construction of the (first embodiment) insulation renovation structure 100 using the insulation renovation method according to the first embodiment is completed.

[0040] Thus, in the construction of the thermal insulation renovation structure 100 using the thermal insulation renovation method according to the first embodiment, it is not necessary to cut the new insulation material 50 so that it can be placed, for example, between adjacent joists 13, thus reducing the construction load.

[0041] Here, Figure 7 illustrates an insulation renovation structure 100 (according to the first embodiment) constructed using the insulation renovation method according to the first embodiment. In Figure 7, mainly joists 13, main beams 14, and new insulation material 50 are shown, and other components are omitted as appropriate. As shown in Figure 7, in the insulation renovation structure 100, the new insulation material 50 extends in the front-to-back direction in a plan view and is installed so as to straddle multiple joists 13. This makes it possible to suppress heat transfer between the interior space and the underfloor space through the joists 13, thereby improving insulation performance.

[0042] In the following, the thermal insulation renovation method and thermal insulation renovation structure 200 according to the second embodiment will be described in detail using the flowchart in Figure 8 and Figures 9 to 11.

[0043] The flowchart shown in Figure 8 illustrates, for example, the procedures performed by a worker in the insulation repair method according to the second embodiment. Note that explanations of the same content in the insulation repair method according to the second embodiment as in the insulation repair method according to the first embodiment will be omitted as appropriate. The insulation repair method according to the second embodiment includes a preparation step (step S21), a removal step (step S22), and a placement step (step S23).

[0044] The preparation step (step S21) shown in Figure 9(a) is the process of preparing the new insulation material 50. The contents of the preparation step (step S21) are substantially the same as those of the preparation step (step S11) according to the first embodiment. In the insulation renovation method according to the second embodiment, the multiple insulation materials 51 that make up the new insulation material 50 are made of a material that is relatively rigid yet can be bent (elastically deformable). The length of the new insulation material 50 in the left-right direction is set to be substantially the same as the length between adjacent main beams 14 in the left-right direction (more specifically, the length between the left side of the left main beam 14 and the right side of the right main beam 14).

[0045] In the removal process (step S22) shown in Figures 9(b) and (c), the main difference from the preparation process (step S11) according to the first embodiment is the location where the removal portion 62 (i.e., the cut 63) is formed. Specifically, the removal portion 62 is the part into which the main beam 14 is inserted in the placement process (step S23), as will be described later (unlike the joist 13 in the first embodiment). The corresponding portion 61 is the part in which the main beam 14 and the new insulation material 50 overlap when the new insulation material 50 is placed in relation to the existing floor structure 10.

[0046] Specifically, in the removal process (step S22), the worker first makes cuts 63 from the bottom upwards near both ends of the new insulation material 50 in the left-right direction, as shown in Figure 9(b). The cuts 63 are formed at positions corresponding to the corresponding main beams 14. Specifically, the cuts 63 are formed at positions corresponding to the right surface of the left main beam 14 and the left surface of the right main beam 14 among the adjacent main beams 14. In a plan view, the cuts 63 are formed in a straight line in the front-back direction (along the longitudinal direction of the main beam 14) (not shown).

[0047] The depth (vertical length) of the cut 63 is determined from a total of four depths D1 to D4 (see Figure 9(b)) from the bottom surface of the new insulation material 50 to the bottom surface of each insulation material 51, such that the vertical length of the portion of the new insulation material 50 located above the cut 63 (upper portion 64) is the same as or slightly shorter than the vertical length of the joist 13. In this embodiment, as shown in Figure 9(b), the depth D3 from the bottom of the new insulation material 50 to the bottom surface of the fourth insulation material 51 is determined as the depth of the cut 63.

[0048] Thus, in the removal process (step S22), after making the cut 63 with the depth D3 as described above, the worker then removes the corresponding portion 61 from the new insulation material 50, as shown in Figure 9(c).

[0049] As a result, a portion of the new insulation material 50 from which the corresponding portion 61 has been removed (removed portion 62) is formed. That is, in the second embodiment, the removed portion 62 is formed by removing the lower portion from both ends of the new insulation material 50 in the left-right direction (longitudinal direction of the joist 13), leaving the upper portion 64.

[0050] The placement process (step S23) shown in Figure 10 is the process of placing the new insulation material 50 on the existing floor structure 10. First, as shown in Figure 10(a), the worker places the new insulation material 50 below the existing floor structure 10 and moves it upward. At this time, the worker tilts the orientation of the new insulation material 50 so that one side (the right side in this embodiment) is positioned higher than the other side (the left side in this embodiment) when viewed from the front. In this way, the worker hooks the upper right end portion 64 of the new insulation material 50 onto one of the adjacent main beams 14.

[0051] Then, as shown in Figure 10(b), the worker deforms the new insulation material 50 by elastic deformation (temporarily shortening its length in the left-right direction) and hooks the upper left portion 64 of the new insulation material 50 onto the other adjacent main beam 14. In other words, the worker passes the new insulation material 50 through the gap between the adjacent main beams 14 by elastic deformation. When the new insulation material 50 returns to its original shape, it is positioned with the new insulation material 50 hooked onto the adjacent main beams 14. That is, the new insulation material 50, which is installed from below, can be positioned without moving it higher than the top surface of the joist 13 (i.e., without interfering with the flooring material 15 placed on the joist 13).

[0052] Furthermore, in this state, the new insulation material 50 is hooked from above the main beam 14 and will not fall, so the new insulation material 50 is fixed to the existing floor structure 10 without the need for fixing processes such as driving in screws. Once the placement process is completed, the construction of the (second embodiment) insulation renovation structure 200 using the insulation renovation method according to the second embodiment is completed.

[0053] Thus, in the construction of the thermal insulation renovation structure 200 using the thermal insulation renovation method according to the second embodiment, there is no need to perform tasks such as driving in screws as described above, thus reducing the construction burden.

[0054] Here, Figure 11 illustrates an insulation renovation structure 200 (according to the second embodiment) constructed using the insulation renovation method according to the second embodiment. In Figure 11, mainly the joists 13, main beams 14, and new insulation material 50 are shown, and other members are omitted as appropriate. As shown in Figures 10 and 11, in the insulation renovation structure 200, the new insulation material 50 can seal the space between the main beams 14 and the floor material 15 (see Figure 1). This makes it possible to suppress heat transfer between the interior space and the underfloor space through the main beams 14 and the floor material 15, thereby improving insulation performance.

[0055] As described above, in the thermal insulation renovation method according to one embodiment of the invention, This is an insulation renovation method that involves installing new insulation material 50 to the existing floor structure 10 of a building. A removal step (steps S12 and S22) is performed to form a removed portion 62 by removing the portion 61 of the new insulation material 50 that corresponds to the horizontal members included in the existing floor structure 10, The process involves moving the new insulation material 50 from below and fitting the horizontal member into the removal section 62, thereby arranging the new insulation material 50 in the existing floor structure 10 (steps S13 and S23), It is equipped with the following features.

[0056] This configuration reduces the construction load compared to the existing floor structure 10.

[0057] Furthermore, in the insulation renovation method according to this embodiment, the vertical position of the upper surface of the new insulation material 50 can be raised. That is, when the new insulation material 50 is installed from below, for example, the upper surface of the new insulation material 50 can be raised higher than the lower surface of the joist 13. This allows the new insulation material 50 to be placed at a relatively high position, and consequently, the vertical length of the underfloor space can be increased (underfloor height can be secured).

[0058] Furthermore, in insulation renovation methods, The system comprises a preparation step (steps S11 and S21) for preparing the new insulation material 50, The aforementioned new insulation material 50 is It is composed of multiple layers of roughly plate-shaped insulating material 51.

[0059] This configuration allows for the easy creation of the removal section 62, thereby reducing the construction burden.

[0060] Furthermore, in insulation renovation methods, The aforementioned horizontal member is This includes joists 13 on which flooring materials included in the existing floor structure 10 are placed.

[0061] This configuration allows for the reduction of construction load by using joists 13.

[0062] Furthermore, in insulation renovation methods, The removal section 62 is The new insulation material 50 is formed so as to be recessed downward from the upper surface, corresponding to the vertical length of the joist 13.

[0063] This configuration eliminates the need to cut the new insulation material 50 between each joist 13, thus reducing the construction workload.

[0064] Furthermore, in insulation renovation methods, The aforementioned horizontal member is This includes a main beam 14 on which the joists 13 included in the existing floor structure 10 are placed.

[0065] This configuration allows for a reduction in construction load by using the main beam 14.

[0066] Furthermore, in insulation renovation methods, The removal section 62 is The new insulation material 50 is formed by removing the lower portion while leaving the upper portion 64 at both ends in the longitudinal direction of the joist 13. In the aforementioned arrangement step, The new insulation material 50 is placed between adjacent main beams 14 in the longitudinal direction of the joist 13, and the upper portion 64 is placed on the main beams 14.

[0067] This configuration eliminates the need to fix the new insulation material 50 by driving in screws B or the like, thus reducing the construction workload.

[0068] Furthermore, in insulation renovation methods, In the aforementioned arrangement step, The new insulation material 50 is elastically deformed such that the upper portions 64 at both ends pass between the adjacent main beams 14 from below.

[0069] This configuration allows for easy placement of the new insulation material 50, thereby reducing the construction burden.

[0070] As described above, in the thermal insulation renovation structure according to one embodiment of the invention, Insulation renovation structures 100 and 200 are constructed by attaching new insulation material 50 to the existing floor structure 10 of a building. The aforementioned new insulation material 50 is The new insulation material 50 has a removed portion 62 from which the portion 61 corresponding to the horizontal member included in the existing floor structure 10 has been removed. The horizontal member is fitted into the removal section 62 and then placed on the existing floor structure 10.

[0071] This configuration reduces the construction load compared to the existing floor structure 10.

[0072] Although embodiments of the present invention have been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention as described in the claims.

[0073] For example, the building to which the thermal insulation renovation method and thermal insulation renovation structure according to the present invention are employed is not limited to residential buildings. Various types of buildings can be used, such as accommodation facilities, medical facilities, nursing care facilities, and commercial facilities.

[0074] Furthermore, the floor structure of a house to which the insulation renovation method is applied is not limited to the existing floor structure 10 according to this embodiment. For example, the existing insulation material 16 does not necessarily have to be provided. Also, the existing insulation material 16 may be installed not by being fitted between adjacent joists as in this embodiment, but by, for example, being placed on the joists.

[0075] Furthermore, the new thermal insulation material 50 according to the first and second embodiments is not limited to the configurations of these embodiments. For example, the new thermal insulation material 50 may be made up of a single sheet rather than multiple layers stacked together. Also, the thermal insulation material 51 of each layer constituting the new thermal insulation material 50 may not be made of the same material, but may be made of different materials for each layer. For example, if the bottommost thermal insulation material 51 is made of a material that is more elastically deformable than the others, the workload of the placement process (step S23) can be reduced.

[0076] Furthermore, in the insulation renovation method according to the second embodiment, the length of the new insulation material 50 in the left-right direction is set to be approximately the same as the length between adjacent main beams 14 in the left-right direction, but this is not limited to this. For example, the length of the new insulation material 50 in the left-right direction can be slightly shorter than the length between adjacent main beams 14 (for example, by about the length of one joist compared to the length according to the second embodiment). This allows the new insulation material 50 to be placed even when there are three or more main beams 14 and multiple adjacent main beams 14 are connected in series. [Explanation of Symbols]

[0077] 10 Existing floor structure 50 New insulation materials 61 Corresponding section 62 Removed part

Claims

1. This is an insulation renovation method that involves installing new insulation material to the existing floor structure of a building. A removal step is to form a removal section by removing the portion of the new insulation material that corresponds to the horizontal members included in the existing floor structure, The process of arranging the new insulation material in the existing floor structure by moving the new insulation material from below and fitting the horizontal member into the removal section, Equipped with, Insulation renovation method.

2. The system includes a preparation step for preparing the aforementioned new insulation material, The aforementioned new insulation material is It is composed of multiple layers of roughly plate-shaped insulating material, The thermal insulation renovation method according to claim 1.

3. The aforementioned horizontal member is Including joists on which flooring materials included in the aforementioned existing floor structure are supported, The thermal insulation renovation method according to claim 1.

4. The removal section is, The new insulation material is formed so as to be recessed downward from the upper surface, corresponding to the vertical length of the joist. The thermal insulation renovation method according to claim 3.

5. The aforementioned horizontal member is Including the main beams on which the joists included in the aforementioned existing floor structure are supported, The thermal insulation renovation method according to claim 1.

6. The removal section is, The new insulation material is formed by removing the lower portion while leaving the upper portion at both ends in the longitudinal direction of the joist. In the aforementioned arrangement step, The new insulation material is placed between adjacent joists in the longitudinal direction of the joist, and the upper portion is placed on the joist. The thermal insulation renovation method according to claim 5.

7. In the aforementioned arrangement step, The new insulation material is elastically deformed such that the upper portions of both ends pass between the adjacent main beams from below. The thermal insulation renovation method according to claim 6.

8. This is an insulation renovation structure in which new insulation material is installed on the existing floor structure of a building. The aforementioned new insulation material is The aforementioned new insulation material has a removed portion from which the portion corresponding to the horizontal members included in the existing floor structure has been removed. With the horizontal member fitted into the removal section, the existing floor structure is positioned as follows: Thermal insulation renovation structure.

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