JP4809661B2 - Wall repair method - Google Patents

Description

  The present invention relates to a wall refurbishing method in which a wall of an existing aeration method is refurbished, and a heat insulating function is added while maintaining the existing dehumidification function, dew condensation prevention function, waterproof function, and drainage function.

  When the wall is hermetically sealed, there is no place for water vapor to escape, and condensation occurs on the back of the outer wall material or on the wall if the outside air temperature is low. Therefore, a method of providing an air layer with a thickness of about 20 mm between the outer wall material and the housing in order to discharge water vapor in the wall to the outside air to prevent internal dew condensation and to discharge moisture that has soaked into the base and pillars to the outside air. A so-called aeration method has been developed. Originally, the ventilation method is a method for preventing dew condensation in the wall. (For example, see Patent Documents 1 to 7).

JP-A-60-175543 JP 09-119175 A JP 09-144152 A Japanese Patent Laid-Open No. 11-241427 JP 11-293801 A JP 2000-291169 A JP 2003-328460 A

  However, Patent Documents 1 to 7 exhaust moisture, but since the outside air passes through the back surface of the outer wall material, even if a heat insulating member is formed on the outer wall material, the effect as a heat insulating material cannot be exhibited. The material did not function as a heat insulating material. Moreover, in order to prevent the leakage of ceramic outer wall materials, a ventilation method is often adopted, and many people are now considering it as a method for finishing rain.

  In order to solve such drawbacks, in the present invention, in the wall structure in which the ventilation layer is formed, the lower opening formed in the lower end portion of the ventilation layer is closed with the lower end closing member to form the moisture exhausting and heat insulating layer. A drainage and heat insulation layer is formed on the outer wall material to form a drainage and heat insulation layer, a new outer wall material is formed on the trunk edge, and the upper end portion of the drainage and heat insulation layer is closed by the upper end closing member, and the lower end portion is opened. It provides a wall repair method.

  According to the wall repair method according to the present invention, (1) moisture in the wall can be discharged to the outside. (2) The moisture of the base and pillar can be discharged to the outside. (3) Since the ventilation layer serves as a moisture exhausting and heat insulating layer and the movement of air is minimized, the air layer can be formed to exhibit heat insulating properties. (4) A drainage and heat insulation layer is formed by a newly formed trunk-rim ventilation layer, and waterproofness can be maintained. (5) Condensation does not occur in the dehumidification / heat insulation layer (wall). (6) Since condensation does not occur, it is difficult for the enclosure to decay. (7) The ventilation layer serves as a moisture exhausting and heat insulating layer, and the outer wall material functions as a heat insulating material. (8) If the new outer wall material having heat insulation is used, the heat insulation of the new outer wall material can be utilized. (9) Since the dehumidifying and heat insulating layer, the outer wall material, and the new outer wall material function as a heat insulating material, the heating efficiency in winter is greatly increased, and the cooling efficiency is increased in summer. (10) Due to the heat insulation of the new outer wall material, the back surface of the new outer wall material and the temperature in the wall are kept high, and the occurrence of internal condensation is suppressed. (11) The wall of the existing ventilation method will be repaired, and the wall will be repaired by adding a heat insulation function while maintaining the existing moisture removal function, condensation prevention function, waterproof function, and drainage function. (12) Utilizing the effect of preventing internal dew condensation, which is the original significance of the air-permeable layer, and further, the outer wall material and the new outer wall material produce a heat insulation effect, thereby keeping the outer wall material and the rear surface of the new outer wall material and the temperature inside the wall high. Therefore, the construction method can improve the energy saving and the prevention effect of dew condensation in the wall. There are features and effects.

  The wall repair method according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view showing an existing wall structure, FIGS. 2 to 8 (a) to (c) are cross-sectional views for explaining a wall repair method according to the present invention, and FIGS. It is explanatory drawing which shows the new outer wall material A. FIG. In the figure, α is a base, β is a fixture such as a nail, T is a ventilation layer, γ is a moisture exhausting / insulating layer (existing ventilation layer T), and γ1 is a draining and insulating layer.

For example, the base α is, for example, an interior material 1, a moisture-proof layer 2 such as a polyethylene sheet (the moisture-proof layer 2 may not be formed), a main body 3 such as a main pillar or an inter-post, and heat insulation such as glass wool formed between the main bodies 3. It is formed from the material 4, etc.

  5 is a moisture permeable waterproof layer (indicated by a two-dot chain line), a moisture permeable waterproof sheet (nonwoven fabric that passes only moisture without passing through wind and rain), or a moisture permeable waterproof board (highly permeable sizing board, sizing insulation). Board, etc.) or load-bearing face materials (structural face materials made of structural plywood, etc.), etc., and formed from members having moisture permeability, windproof properties, waterproof properties, and the like. Of course, it is not necessary as long as a certain waterproof property (sufficient surface water stoppage) is maintained as a wall material.

  6 is a ventilating layer T formed on the existing trunk edge, and is formed so as to communicate with the upper and lower openings, for example, a vertical trunk edge. When the lower end of the existing trunk edge 6 is closed by the lower end closing member C, the moisture removal and heat insulation layer γ is formed. The material of the existing trunk edge 6 is wood, metal material, plastic material, or the like. The dotted line arrow indicates the moisture exhaust from the inside.

  Reference numeral 7 denotes an upper opening, and 8 denotes a lower opening, which communicates with the ventilation layer T formed by the existing trunk edge 6 and is an outlet for discharging indoor moisture to the outside. In addition, although it forms with the structure ventilated from the back of a hut in the figure, you may ventilate from the eaves top plate part.

  9 is a trunk edge, and the lower end portion is formed by the lower end closing member C and the draining member D as shown in FIGS. 6 (a), 6 (b) and 7 (a), and as shown in FIG. 7 (b). The upper end portion is closed by the upper end closing member E, for example, a vertical trunk edge. The material of the existing trunk edge 9 is wood, metal material, plastic material, or the like.

  Reference numeral 10 denotes a lower opening, which allows rainwater, condensed water, etc. that has entered the interior to be discharged from the lower opening 10 to the outside through the draining member D.

  A is a newly installed outer wall material, and is a member having functions such as heat insulation, waterproofness, airtightness, weather resistance, and the like. For example, a metal siding material as shown in FIGS. 9A to 9D or a ceramic siding material is used.

  B is an outer wall material, which is a wall material formed on the moisture-exhausting and heat-insulating layer γ, in which a ventilation layer T is formed by the existing trunk edge 6 and whose lower end is closed by the lower end closing member C. The materials include ceramic siding materials, metal siding materials, and the like. In addition, W is an existing wall, and consists of the base α, the moisture-permeable waterproof layer 5, the existing trunk edge 6, and the outer wall material B.

  C is a lower end closing member, D is a draining member, E is an upper end closing member, and is a molded product of a long plate material having a cross section as shown in FIGS. The material of the main body F is made of a roll molded product such as a metal material or a plastic material, or an extrusion molded product. In addition, P is a packing material for improving airtightness formed continuously.

  The lower end closing member C is formed by closing the lower end of the air-permeable layer T formed by the existing trunk edge 6 to form the moisture exhausting and heat insulating layer γ, preventing the inflow of air from the lower end part, The heat insulating layer γ is formed to function as a heat insulating layer.

  Although the draining member D is formed in the drawing, it is not particularly formed. Further, the upper end closing member E prevents the inflow of air from the upper end of the new outer wall material A, and the air layer formed by the trunk edge 9 is used as a drainage and heat insulation layer γ1.

  The moisture-exhausting and heat-insulating layer γ consists of a space formed by closing the lower opening 8 at the lower end of the ventilation layer T with the lower-end closing member C, and only the moisture exhaust layer and moisture for discharging indoor moisture to the outside. It functions as a heat insulation layer that discharges and maintains the temperature.

The drainage and heat insulation layer γ1 is formed by closing the upper end of the ventilation layer T formed of the trunk edge 9 formed on the outer wall material B and the new outer wall material A formed on the trunk edge 9 with the upper end closing member E and opening the lower end at the lower end. 10 is obtained by forming a drainage layer for draining rainwater or the like entering inside the emergency to the outside, and functions as a heat insulating layer by an air layer.

  In order to evaluate the heat insulation and moisture permeability of the ventilation layer T, a test was conducted.

  Table 1 shows the thermal resistance value in the structure of tests No1 to No4 as shown in Table 1 with respect to the “outer wall material B + ventilation layer T” formed in the wall structure as shown in FIG. And the result of measuring the thermal resistance value with the structure of “metal siding direct tension” (when there is no ventilation layer T) in which the metal siding is stretched directly on the casing. As the outer wall material B, metal siding was used.

As a result, the structure of test No. 4 used for the wall repair method according to the present invention is 0.29 (No. 1): 0.67 (No. 4) or more than the structure in which the ventilation layer T of Test No. 1 is formed. In addition, 0.69 (No2): 0.78 (No3) for the structure in which the top of the vent layer T of Test No2 is closed and the top and bottom of the vent layer T of Test No3 are closed : 0.67 (No4) was found to exhibit a heat insulating property that is not so different. From this result, it can be seen that if the upper opening 7, or the lower opening 8, or the upper opening 7 and the lower opening 8 are closed, the outer wall material B and the ventilation layer T function as a heat insulating layer. In the wall refurbishing method according to the present invention, the structure No. 4 is selected in consideration of the fact that moisture, that is, water vapor moves lighter upward than air in order to discharge moisture inside the wall.

Table 2 shows the results of measuring the moisture permeation resistance with the structures of tests No1 to No4 as shown in Table 2 for “outer wall material B + ventilation layer T” in order to compare the moisture permeation resistance. As the outer wall material B, metal siding was used.

As a result, in the structure where test No2 (moisture permeability resistance 22.0) and test No3 (moisture permeability resistance 22.0) are closed, there is no difference in moisture permeability resistance whether the bottom is closed or opened. I came out. On the other hand, in the structure of test No. 4 used for the structure according to the present invention, in which the upper part is opened and the lower part is closed, the moisture permeability resistance is 4.0, and a clear difference in test results has occurred. This is because the test confirmed that moisture, that is, water vapor moves lighter upward than air, and that the ventilation layer T closes one of the upper and lower sides, so that the heat convection due to the movement of air is extremely reduced. That is. Of course, it is a natural result that the numerical value of the test No. 1 (moisture permeability resistance 1.0) of the structure in which the top and bottom are opened is low.

  As described above, according to the wall repairing method according to the present invention, in the conventional ventilation method in which the ventilation layer T is formed on the back surface of the outer wall material B, the outer wall material B is formed even if a heat-insulating member is formed as the outer wall material B. Is not recognized as a heat insulating material, but the lower end of the air-permeable layer T is closed with the lower-end closing member C, and the air-permeable layer T is used as a moisture-exhausting and heat-insulating layer γ, thereby allowing internal condensation, which is the original meaning of the air-permeable layer Taking advantage of the prevention effect, the outer wall material B and the new outer wall material A produce a heat insulation effect, so that the outer wall material B, the rear surface of the new outer wall material A and the temperature inside the wall can be kept high. This is a construction method that can enhance the effect of preventing condensation.

This, like the ventilation method so far, unlike the structure for preventing the dew condensation by the ventilation layer T is the ambient air moves, because of the structure that can be discharged moisture only to the outside, new outer wall having a heat insulating property The performance of the material A can be effectively utilized. In addition, it is a method that has been confirmed by theory and experiment that moisture, that is, water vapor moves lightly upward than air, and that the ventilation layer T closes one of the upper and lower sides, and that heat convection due to the movement of air is extremely reduced. is there.

  What has been described above is only one embodiment of the wall repairing method according to the present invention, and it can be formed as shown in FIGS.

  FIG. 10 is a cross-sectional view showing a wall repair method in which the heat insulating material G is formed and the heat insulating property is improved.

  FIG. 11 shows a wall repairing method in which a newly formed moisture-permeable waterproof layer 5 is formed on the outer wall material B.

It is explanatory drawing which shows a typical example of the existing wall structure of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the wall repair method which concerns on this invention. It is explanatory drawing which shows a typical example of the new exterior wall material used for the wall repair method which concerns on this invention. It is sectional drawing which shows the other Example of the wall repair method which concerns on this invention. It is sectional drawing which shows the other Example of the wall repair method which concerns on this invention.

Explanation of symbols

α Base β Fixture γ Dehumidification and heat insulation layer γ1 Drainage and heat insulation layer A New outer wall material B Outer wall material C Lower end closing member D Draining member E Upper end closing member F Main body G Insulation material P Packing material T Venting layer W Existing wall 1 Interior Material 2 Moisture proof layer 3 Housing 4 Heat insulating material 5 Moisture permeable waterproof layer 6 Existing trunk 7 Upper opening 8 Lower opening 9 Trunk edge 10 Lower opening

Claims (1)

In the wall structure in which the ventilation layer is formed, the lower opening formed in the lower end portion of the ventilation layer is closed by the lower end closing member to form a moisture exhausting and heat insulating layer, and the trunk edge is formed on the outer wall material to drain the water. A wall refurbishment characterized in that it forms a cum heat insulation layer, forms a new outer wall material on the body edge, closes the upper end portion of the drainage heat insulation layer with an upper closing member, and opens the lower end portion. Method.

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