JP2010121378A - Roof panel, venting roof-underlayer structure, and venting structure of hipped roof and branched roof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a heat insulating property of a roof while improving venting performance, and in particular to prevent dew condensation in a corner and a valley. <P>SOLUTION: In a roof panel 1B, a ventilation passage 4A having a width same as the thickness of a heat-insulating interposing plate 3B is formed between a sheathing face plate 2 and a heat insulating main plate 3A, and a lateral ventilation passage 4B is formed in the heat-insulating interposing plate 3B. A ridge ventilation passage 11A, a corner ventilation passage 11B, a valley ventilation passage 11C, the longitudinal ventilation passage 4A, and the lateral ventilation passage 4B are formed in the roof 17 by using the roof panel 1B for each of a hipped roof part 17B and the parts of a main roof 17A on both sides of the hipped roof 17B, or a branched roof 17C and the part of the main roof 17A on a ridge side from a boundary between the main roof 17A and the branched roof 17C, so that the venting structure of the roof secures smooth ventilation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roof panel used for imparting air permeability to a roof, and an air-permeable roof foundation structure using the above-mentioned roof panel, and a ventilation structure of a laid roof and a branched roof.

Conventionally, the heat insulating main plate 3A made of a plastic foam as shown in FIGS. 1 and 2 is attached to the upper surface of a heat insulating main plate 3A made of a plastic foam along both side edges of the upper surface. A plurality of the heat insulating materials 3 are connected between the field ground material 2 and the heat insulating main plate 3A through a gap corresponding to the width of the rafter along the horizontal direction perpendicular to the vertical direction which is the longitudinal direction of the heat insulating insertion plate 3B. There is provided a roof panel 1A in which a vertical air passage 4 having a thickness of the heat insulating insertion plate 3B is formed therebetween, and a rafter fitting groove 5 is formed between the left and right heat insulating materials 3.
The roof panel 1A is attached to the rafter 6 of the roof skeleton, and the rafter 6 is fitted into the rafter fitting groove 5 of the roof panel 1A. In this state, the upper surface of the rafter 6 and the lower surface of the field material 2 Are in surface contact with each other to form a roof base structure.

JP 2008-231864 A JP 9-49292 A

In the above-mentioned roof base structure, since there is no heat insulating material in the surface contact portion between the rafter 6 and the field material 2, a thermal bridge is formed and becomes a heat insulating defect portion. Therefore, as means for complementing the heat insulation defect portion, means for increasing the thickness of the heat insulation main plate 3A and the heat insulation insertion plate 3B in contact with the side surface of the rafter 6 or means for increasing the width of the heat insulation insertion plate 3B. Can be considered.
However, the thickness of the heat insulating main plate 3A and the heat insulating insertion plate 3B is limited by the vertical width of the rafter 6, and when the horizontal width of the heat insulating insertion plate 3B is increased, the horizontal width of the vertical air passage 4 is reduced accordingly, and the vertical air passage There is a problem that the sectional area of 4 becomes small and sufficient ventilation cannot be secured.
In particular, in the case of a dormitory roof, the part corresponding to both sides of the dormitory part and the main roof part of the dormitory part, or in the case of a branched roof, the ridge is formed from the boundary line between the branched roof part and the main roof part. There is a problem that moisture tends to accumulate in the side portion, and condensation occurs in that portion unless sufficient ventilation is secured.

In the present invention, as means for solving the above-described conventional problems, an elongated heat insulating insertion plate 3B made of plastic foam is pasted on the upper surface of the heat insulating main plate 3A made of plastic foam along both side edges of the upper surface. A plurality of pieces of the heat insulating material 3 configured by wearing are placed along the horizontal direction perpendicular to the vertical direction, which is the longitudinal direction of the heat insulating insertion plate 3B, through the gap of the width of the rafter 6 across the field. A rafter fitting groove 5 is formed between the heat insulating materials 3 by adhering to the lower surface of the heat insulating material 3, and a vertical air passage corresponding to the thickness of the heat insulating insertion plate 3B is formed between the field ground material 2 and the heat insulating main plate 3A. 4A is formed, and the roof panel 1B penetrating one or two or more lateral ventilation paths 4B is provided on the heat insulating insertion plate 3B on both side edges.
Further, according to the present invention, the roof panel 1B is attached to the roof skeleton by inserting the rafter 6 of the roof skeleton in the rafter fitting grooves 5 and 5A, and the upper surface of the rafter 6 and the field material. The rafter 6 and the field material 2 are joined to each other at the surface contact portion where the lower surface of the surface 2 is in surface contact.
Furthermore, in the present invention, in the dormitory roof composed of the main roof portion 17A and the dormitory portions 17B formed at both ends of the main roof portion 17A, the heat insulating main plate 3A made of plastic foam and the heat insulating main plate 3A A plurality of heat insulating materials 3 made of plastic foam and attached along both side edges of the upper surface are transversely orthogonal to the longitudinal direction, which is the longitudinal direction of the heat insulating insertion plate 3B. A rafter fitting groove 5 is formed between the heat insulating materials 3 by arranging and adhering to the lower surface of the field ground material 2 through a gap corresponding to the width of the rafter 6 along the direction. And the heat insulation main plate 3A, a roof panel 1A having a vertical air passage 4A corresponding to the thickness of the heat insulation insertion plate 3B is used, and the roof panel 1A is deposited on the rafter 6 of the roof skeleton, The rafter 6 is attached to the roof panel 1A. In the eaves edge of the roof that fits in the fitting grooves 5 and 5A, the eaves tip of the vertical ventilation path 4A of the roof panel 1A is directly opened to the outside air, and is in the roof ridge 171. Is configured such that a pair of roof panels 1A, 1A are opposed to each other along the purlin 7C and abut each other above the purlin 7C to provide a ridge ventilation path 11A between the pair of roof panels 1A, 1A. The ridge side end of the vertical ventilation path 4A of the roof panel 1A, 1A is opened to the road 11A, and the roof panel is provided on the berth part 17B and the part corresponding to both sides of the berth part 17B of the main roof part 17A. A ventilation structure of a dormitory roof using 1B is provided.
In this case, in the corner portion 172 that is a boundary line between the main roof portion 17A and the berthing portion 17B, the pair of roof panels 1B and 1B are opposed to each other along the corner tree 7D, and the heat insulating material 3 is insulated. By aligning the upper surface of the main plate 3A with the top surface of the corner tree 7D so that the vertical ventilation path 4A of the heat insulating material 3 is not blocked by the corner tree 7D, the corner ventilation path 11B is provided between the pair of roof panels 1B and 1B. Thus, it is desirable to open the corner side end of the vertical ventilation path 4A of the roof panel 1B in the corner ventilation path 11B, and the roof material is installed on the upper surface of the field material 2 of the roof panels 1B and 1B. Then, it is desirable to open the ventilation passage 11 </ b> A and the corner ventilation passage 11 </ b> B to the outside air through the ventilation member 16 by attaching the ventilation member 16 to predetermined portions of the ridge 171 and the corner 172.
Further, in the present invention, in the main roof portion 17A and the branched roof in which the branched roof portion 17C is branched from one side of the main roof portion 17A, the heat insulating main plate 3A made of plastic foam and the upper surface of the heat insulating main plate 3A A plurality of heat insulating materials 3 made of a thin heat insulating insertion plate 3B made of plastic foam and adhered along both side edges are arranged in a transverse direction perpendicular to the vertical direction which is the longitudinal direction of the heat insulating insertion plate 3B. The rafter fitting groove 5 is formed between the heat insulating materials 3 by being disposed and bonded to the lower surface of the field ground material 2 through a gap corresponding to the width of the rafter 6 along the width of the field material 2. A roof panel 1A in which a vertical air passage 4A corresponding to the thickness of the heat insulating insertion plate 3B is formed between the heat insulating main plate 3A and the roof panel 1A is deposited on a rafter 6 of a roof skeleton, and the rafter 6 is a rafter fitting of the heat insulating material 3 of the roof panel 1A. In the eaves of the roof that fits into the grooves 5 and 5A, the eaves tip of the vertical ventilation path 4A of the roof panel 1A is directly opened to the outside air, and the roof ridge 171 is A pair of roof panels 1A, 1A are made to face each other along the purlin 7C, and abutment each other above the purlin 7C provides a ridge ventilation path 11A between the pair of roof panels 1A, 1A. The ridge side end of the vertical ventilation path 4A of the roof panels 1A, 1A is opened, and the ridge side portion from the boundary line between the branched roof portion 17C and the branched roof portion 17C in the main roof portion 17A A ventilating structure of a branched roof using the roof panel 1B is provided.
In this case, in the valley portion 173 that is a boundary line between the main roof portion 17A and the branched roof portion 17C, the pair of opposed roof panels 1B and 1B are opposed to each other via the valley 7E, and the heat insulation is performed. By aligning the upper surface of the heat insulating main plate 3A of the material 3 with the top surface of the valley 7E so that the vertical air passage 4A of the heat insulating material 3 is not blocked by the valley 7E, the valley between the pair of roof panels 1B and 1B. It is desirable that an air passage 11C is provided so that the valley air passage 11C communicates with the building air passage 11A through the vertical air passage 4A of the roof panels 1B and 1B.

[Action]
In the roof using the roof panel 1B of the present invention, with the rafter 6 fitted in the rafter fitting groove 5 of the roof panel 1B, the lower surface of the field material 2 and the upper surface of the rafter 6 provide the heat insulating material 3. It forms a thermal bridge by direct contact without intervening and becomes a heat-insulating defect part. When the width of the heat insulation insertion plate 3B of the roof panel 1B is enlarged to complement the heat insulation defect portion, the width of the vertical ventilation path 4A formed between the heat insulation main plate 3A and the field material 2 is increased. However, since the horizontal ventilation path 4B is formed in the heat insulation insertion plate 3B of the heat insulating material 3 of the roof panel 1B, the vertical ventilation paths 4A communicate with each other through the horizontal ventilation path 4B. As a result, ventilation is performed vertically and horizontally.

〔effect〕
Therefore, in this invention, in order to complement the heat insulation defect | deletion part of the rafter fitting part of the heat insulating material 3, the horizontal width of the heat insulation insertion board 3B of the heat insulating material 3 in contact with the rafter is expanded, and the vertical ventilation path 4A. Even if the cross-sectional area is reduced, sufficient ventilation can be secured and condensation on the roof, especially on the dormitory roof and branch roof, can be effectively prevented.

The present invention will be described below with reference to an embodiment shown in FIGS.
As shown in FIGS. 1 and 2, a roof panel 1 </ b> A used in the roof ventilation structure of the present invention includes a field material 2 and a heat insulating material 3 bonded to the lower surface of the field material 2 with an adhesive. It is constituted by.
The heat insulating material 3 includes a heat insulating main plate 3A and an elongated heat insulating insertion plate 3B attached to the upper surface of the heat insulating main plate 3A along both side edges of the upper surface. The heat insulating main plate 3A and the heat insulating insertion plate 3B are made of polystyrene foam, polyethylene foam, polypropylene foam, semi-rigid polyurethane foam, semi-rigid polyurethane foam having plastic films attached on both upper and lower surfaces, or phenol. A plastic foam such as a resin foam or a melamine resin foam is used as a material.
A plurality of the heat insulating materials 3 are bonded to the lower surface of the field material 2, but at this time, the heat insulating materials 3 are mutually connected through the rafter width (with an interval of the rafter 6 width). The rafter fitting groove 5 is formed between the pair of heat insulating materials 3 by being arranged along the horizontal direction perpendicular to the vertical direction, which is the longitudinal direction of the two. Between the field surface material 2 and the heat insulating main plate 3A of the heat insulating material 3, a vertical air passage 4A having a vertical width corresponding to the thickness of the heat insulating insertion plate 3B is formed.
Further, at both ends of the roof panel 1A, the field ground material 2 is extended from the side edge of the heat insulating insertion plate 3B, and the width of the extended portion 3C is ½ of the width of the rafter fitting groove 5A. Set to. Thus, as shown in FIG. 3, rafter fitting grooves 5 </ b> A are formed between the roof panels 1 </ b> A in a state where the roof panels 1 </ b> A are arranged in the lateral direction.

Furthermore, the roof panel 1B shown in FIG. 4 is obtained by forming one or two or more lateral ventilation paths 4B on the heat insulating insertion plate 3B of the roof panel 1A.
In the roof panels 1A and 1B, for example, the thickness of the heat insulating main plate 3A is set to 55 mm, the width is 410 mm, the thickness of the heat insulating insertion plate 3B is 20 mm, and the width is set to a range of 30 to 120 mm. And the width of the rafter 6 is 45 mm, the thickness of the field material 2 is 12 mm, the total width of the roof panels 1A and 1B is 910 mm, the width of the horizontal ventilation path 4B is 100 mm or more, and the depth is 10 mm or more.

  An example of a roof skeleton to which the present invention is applied is shown in FIG. In FIG. 5A), the roof 17 is a dormitory branch roof in which a branch roof portion 17C is branched from one end of a ridge main roof portion 17A having a ridge portion 17B formed at both ends, and includes a ridge portion 171 and a corner portion 172. , A valley 173 exists. FIG. 5 (b) is a diagram showing a portion where the roof panel 1B is applied on the roof 17 by a hatched portion, and an arrow in the drawing indicates a ventilation direction of the roof structure in the present invention.

As shown in FIG. 6, the roof panel 1 </ b> A is attached on the rafter 6 of the roof skeleton by fitting the rafter fitting grooves 5, 5 </ b> A of the heat insulating material 3 to the rafter 6.
In order to increase the heat insulation efficiency, the thickness of the heat insulation insertion plate 3B is desirably 20 mm or more. And in the interconnection part of the horizontal direction of this roof panel 1A, airtightness is ensured by interposing the rafter sealing material 8 between this heat insulating material 3 and the rafter 6 as shown in FIG.

As shown in FIG. 7, in the main roof portion 17A and the branched roof portion 17C, the rafter 6 is supported from the lower side (indoor side) by an eaves girder 7A, a purlin 7B, and a purlin 7C. Although not shown in particular, the rafter 6 is supported from the lower side (indoor side) by the eaves girder 7A and the purlin 7B, and is joined to the side surface of the corner tree 7D. And the eaves edge side edge of the ventilation path 4A of this roof panel 1A (1B) in the eaves edge part of this main roof part 17A and this branched roof part 17C is open | released by the open air.
In addition, at the eaves of the main roof portion 17A and the branched roof portion 17C, the lower surface of the heat insulating main plate 3A of the heat insulating material 3 is brought into contact with the upper end of the wall heat insulating material 20, and further the heat insulation of the roof panel 1A (1B). By filling the eaves seal material 9 into the gap formed between the lower surface of the heat insulating main plate 3A of the material 3 and the upper end of the wall heat insulating material 20, at the joint between the heat insulating material 3 of the roof and the wall heat insulating material 20 The continuity of the heat insulation structure is prevented from being interrupted. The eaves seal 9 is made of a soft plastic foam such as a soft polyurethane foam, a soft polyvinyl chloride foam, or a synthetic rubber sponge.
In the ridge portion 171 of the main roof portion 17A and the branched roof portion 17C, the left and right roof panels 1A, 1A are abutted against each other above the purlin 7C, and the ridge is formed in the gap between the joint portions of these roof panels 1A, 1A. By filling the part sealing material 10, the continuity of the heat insulating structure is prevented from being interrupted. The ridge seal material 10 is made of a soft plastic foam similar to the eaves seal material 9. The ridge seal material 10 is filled between the heat insulating main plates 3A of the heat insulating material 3 of the roof panel 1A so as not to block the air passage 4A of the roof panel 1A. A ridge ventilation path 11A is formed between the left and right roof panels 1A and 1A along the ridge 171. The ridge side ends of the ventilation paths 4A and 4A of the roof panels 1A and 1A are the ridge ventilation paths. 11A is set to be open.

As shown in FIG. 8, a roof material 12 is provided on the upper surface of the field ground material 2 of the roof panel 1A. In the ridge 171, the draining plate 14 is covered with the caps 13 and 13.
As shown in FIG. 9, a ventilation member 16 is attached to a predetermined portion of the ridge 171, and the ridge ventilation path 11 </ b> A of the main roof portion 17 </ b> A is opened to the outside air through the ventilation member 16. Is set to
As shown in FIG. 10, the ventilation member 16 is made of a plastic such as polypropylene or polyvinyl chloride, and includes a cap-shaped draining plate 16A and a breathable block 16B bonded to both sides of the lower surface of the draining plate 16A. . The breathable block 16B is provided with a large number of communication holes, for example, in a honeycomb shape.

As shown in FIG. 11, in the corner portion 172 of the main roof portion 17A and the branched roof portion 17C, the opposing left and right roof panels 1B and 1B are deposited on the rafter 6A and are opposed to each other via the corner wood 7D. Furthermore, the upper surface of the heat insulating main plate 3A of the heat insulating material 3 is made to coincide with the left and right top surfaces of the corner tree 7D. Further, a corner air passage 11B is formed between the left and right roof panels 1B, 1B along the corner portion 172, and the corner side ends of the air passages 4A, 4A of the roof panel 1B, 1B are the corner air passages. 11B is set to be opened. A ventilation member 16 is attached to a predetermined portion of the corner 172, and the corner ventilation path 11B is set to be opened to the outside air through the ventilation member 16.
The end face of the heat insulating material 3 of the roof panels 1B and 1B on both sides is in close contact with the side surface of the corner tree 7D, and the lower end of the joint portion of the heat insulating main plate 3A is sealed with a heat insulating sealing material, so that the corner portion is hermetically sealed. Is done.

In the ridge portion 171 of the main roof portion 17A and the branched roof portion 17C, the eaves side is ventilated by the eaves tips of the ventilation passages 4A of the roof panel 1A being directly open to the outside air. Ventilation is performed by opening the ventilation path 4A of the roof panel 1A to the building ventilation path 11A and opening the building ventilation path 11A to the outside air through the ventilation member 16.
In the corner portion 172, ventilation on the eaves side excluding the valley portion 173 is performed by directly opening the eave end of the ventilation path 4A of the roof panel 1B to the outside air, and the corner side ventilation is performed on the roof panel 1B. The ventilation path 4A is opened to the corner ventilation path 11B, the corner ventilation path 11B is opened to the outside air through the ventilation member 16, and the lateral ventilation path 4B of each roof panel 1B is further vented to the ventilation path 4A of each roof panel 1B. This is done by ventilating between them.

  On the other hand, in the valley 173, as shown in FIG. 12, the valley 7E is fitted between the heat insulation main plates 3A of the heat insulating materials 3 of the left and right roof panels 1B, 1B, and the heat insulation main plate 3A. , That is, the upper surface of the rafter 6 and the left and right top surfaces of the valley 7E are made to coincide with each other. At that time, a valley air passage 11C is formed along the valley between each field material 2 of the left and right roof panels 1B, 1B and the heat insulation insertion plate 3B of each heat insulating material 3, and the valley air passage 11C. An inverted shade-shaped draining plate 14A is attached so as to close the upper portion. In addition, the end face of the heat insulating material 3 of the roof panels 1B and 1B on both sides thereof is in close contact with the side surface of the valley 7E, and the lower end of the joint portion of the heat insulating main plate 3A is sealed with the heat insulating sealing material 10B to ensure airtightness. .

In the valley portion 173, the valley side end of the vertical ventilation path 4A of the roof panel 1B is opened to the valley ventilation path 11C, and the ridge side or the corner side of the vertical ventilation path 4A of the roof panel 1B is the ridge portion 171. Opened to the building ventilation path 11A or the corner ventilation path 11B of the corner 172, the vertical ventilation paths 4A of the roof panels 1B are connected to each other by the horizontal ventilation path 4B.
For ventilation of the valley 173, the valley ventilation path 11C is opened to the building ventilation path 11A of the building part 171 or the corner ventilation path 11B of the corner 172 via the vertical ventilation path 4A of the roof panel 1B. 11A or the corner ventilation path 11B is opened to the outside air through the ventilation member 16, and the ventilation between the roof panels 1B is further achieved by the lateral ventilation path 4B of each roof panel 1B. Accordingly, the moisture to be concentrated on the valley portion 173 flows to the ridge air passage 11A of the ridge portion 171 or the corner air passage 11B of the corner portion 172 via the air passage 4A while gathering in the valley air passage 11C. Since the air passage 11 </ b> A or the corner air passage 11 </ b> B is opened to the outside air through the ventilation member 16, the condensation of the valley portion 173 is prevented.
In the above embodiment, the roof having both the dormitory part and the branched roof part is taken up. However, the present invention may be applied to a roof having only the dormitory part or a roof having only the branched roof part.
Note that the roof panel 1B may be disposed on the entire main roof portion 17A.

  In the present invention, even when the heat insulation deficient part of the roof structure is complemented and the roof heat insulation effect is improved, the roof can be efficiently ventilated particularly in the dormitory part and the branched roof part, and thus dew condensation is effective. Therefore, it can be used industrially.

1 to 12 show an embodiment of the present invention.
It is a fragmentary perspective view of 1 A of roof panels. It is a cross-sectional view of the roof panel 1A. It is a cross-sectional view which shows the state which has arrange | positioned the roof panel 1A in the horizontal direction. It is a fragmentary perspective view of the roof panel 1B. It is explanatory drawing of a dormitory branch roof. It is a partial cross-sectional view of a state where a roof panel is deposited on a roof skeleton. It is AA sectional drawing in FIG. It is a cross-sectional view (draining board attachment part) of a ridge part. It is a cross-sectional view (ventilation member attachment part) of a ridge part. It is a front view of a ventilation member. It is BB sectional drawing in FIG. It is CC sectional drawing in FIG.

Explanation of symbols

1A, 1B Roof panel 2 Field material 3 Heat insulation material 3A Heat insulation main plate 3B Heat insulation insertion plate 4A Vertical air passage 4B Horizontal air passage 5, 5A Rafter fitting groove 6, 6A Rafter 7C Purlin 7D Sumiki 7E Tani 8, 9, DESCRIPTION OF SYMBOLS 10 Sealing material 11A Building ventilation path 11B Corner ventilation path 11C Valley ventilation path 16 Ventilation member 17 Roof 17A Main roof part 17B Building part 17C Branch roof part 173 Valley part

Claims (7)

A plurality of pieces of heat insulating material constituted by adhering elongated heat insulating insertion plates made of plastic foam along the both side edges of the upper surface to the upper surface of the heat insulating main plate made of plastic foam,
The rafter fitting groove is formed between the heat insulating materials by adhering to the lower surface of the field ground material through a gap corresponding to the width of the rafters along the horizontal direction perpendicular to the vertical direction which is the longitudinal direction of the heat insulating insertion plate. Forming,
Form a vertical air passage for the thickness of the heat insulation insertion plate between the field material and the heat insulation main plate,
Further, the roof panel, wherein one or two or more horizontal air passages are penetrated through the heat insulating insertion plates on both side edges. The roof panel according to claim 1 is attached onto the roof skeleton by inserting a rafter of the roof skeleton in the rafter fitting groove, and the upper surface of the rafter and the lower surface of the field ground material are in surface contact. A ventilated roof base structure characterized in that the rafter and the field material are joined at a surface contact portion. In the dormitory roof consisting of the main roof part and the berth parts formed at both ends of the main roof part,
A plurality of heat insulating materials composed of a heat insulating main plate made of a plastic foam and an elongated heat insulating insertion plate made of a plastic foam adhered along both side edges of the upper surface of the heat insulating main plate,
The rafters are arranged between the heat insulating materials by being disposed and bonded to the lower surface of the field ground material through a gap corresponding to the width of the rafters along the horizontal direction perpendicular to the vertical direction which is the longitudinal direction of the heat insulating insertion plate. Forming a mating groove,
Using a roof panel in which a vertical ventilation path corresponding to the thickness of the heat insulation insertion plate is formed between the field material and the heat insulation main plate,
The roof panel is deposited on a rafter of a roof skeleton, the rafter is fitted into a rafter fitting groove of the heat insulating material of the roof panel, and the roof panel has a vertical ventilation of the roof panel. Open the eaves end of the road directly to the open air,
In the ridge portion of the roof, a pair of roof panels are opposed to each other along the purlin, and abutment is established between the pair of roof panels by facing each other above the purlin. Open the ridge side end of the vertical ventilation channel of the roof panel,
The ventilation structure of the dormitory roof characterized by using the roof panel of Claim 1 for the part corresponding to the both sides of the berth part of the said dormitory part and the said main roof part. In the corner that is the boundary line between the main roof and the dormitory,
A pair of roof panels are opposed to each other along a corner tree, and the upper surface of the heat insulating main plate of the heat insulating material is aligned with the top surface of the corner tree so that the vertical ventilation passage of the heat insulating material is not blocked by the corner tree. The ventilating structure for a dormitory roof according to claim 3, wherein a corner ventilation path is provided between the panels, and a corner side end of the vertical ventilation path of the roof panel is opened in the corner ventilation path. A roofing material is installed on the upper surface of the field material of the roof panel, and a ventilation member is attached to a predetermined portion of the ridge and the corner, thereby connecting the ridge ventilation passage and the corner ventilation passage through the ventilation member. The ventilation structure of the dormitory roof of Claim 3 or Claim 4 open | released to external air. In the branched roof in which the branched roof portion is branched from one side of the main roof portion and the main roof portion,
A plurality of heat insulating materials composed of a heat insulating main plate made of a plastic foam and an elongated heat insulating insertion plate made of a plastic foam adhered along both side edges of the upper surface of the heat insulating main plate,
The rafters are arranged between the heat insulating materials by being disposed and bonded to the lower surface of the field ground material through a gap corresponding to the width of the rafters along the horizontal direction perpendicular to the vertical direction which is the longitudinal direction of the heat insulating insertion plate. Forming a mating groove,
Using a roof panel in which a vertical ventilation path corresponding to the thickness of the heat insulation insertion plate is formed between the field material and the heat insulation main plate,
The roof panel is deposited on a rafter of a roof skeleton, the rafter is fitted into a rafter fitting groove of the heat insulating material of the roof panel, and the roof panel has a vertical ventilation of the roof panel. Open the eaves end of the road directly to the open air,
In the ridge portion of the roof, a pair of roof panels are opposed to each other along the purlin, and abutment is established between the pair of roof panels by facing each other above the purlin. Open the ridge side end of the vertical ventilation channel of the roof panel,
The ventilation structure of the branched roof characterized by using the roof panel of Claim 1 for the ridge side part from the boundary line with the said branched roof part in the said branched roof part and the said main roof part. In the valley that is the boundary line between the main roof and the branched roof,
A pair of facing roof panels are opposed to each other through a valley,
By aligning the upper surface of the heat insulating main plate of the heat insulating material with the top surface of the valley and preventing the vertical air passage of the heat insulating material from being blocked by the valley, a valley air passage is provided between a pair of roof panels, The ventilating structure for a branched roof according to claim 6, wherein the valley airway is connected to the ridge airway through the vertical airway of the roof panel.