CN118745797A - Sloped roof overhang structure and construction method of passive building - Google Patents

Abstract

The invention provides a sloping roof cornice structure of a passive building and a construction method thereof, wherein the sloping roof cornice structure comprises the following steps of: the building comprises a sloping roof reinforced concrete structure plate, a cement mortar leveling layer, a steam isolation coiled material, a first-layer wood keel, a second-layer wood keel, a waterproof coiled material, a fine stone concrete protection layer, a cis Shui Tiao, battens and roof tiles, wherein the first-layer wood keel is paved in parallel with the ridge direction, and a first-layer heat insulation plate is paved in a gap of the first-layer wood keel; the two layers of wood keels are paved perpendicular to the ridge direction, and the two layers of wood keels are formed by overhanging perpendicular to the ridge direction to form cornice main keels and cornice stressed keels, and two layers of heat insulation boards are paved in gaps of the two layers of wood keels. The roof construction system can realize deep eave of the roof, meets the performance requirement of wind pressure resistance of the roof, and simultaneously forms a roof enclosure system by the fireproof and anticorrosion wood keels and the heat insulation, is firmly connected with a construction system formed by the tiles and the steel keels, and has no cold-hot bridge association in construction.

Description

Sloped roof overhang structure and construction method of passive building

Technical Field

The invention relates to a passive building structure, in particular to a passive building slope roof overhanging eaves structure and a construction method thereof.

Background Art

Passive buildings mainly rely on the structure, materials and design of the building itself to achieve efficient thermal insulation performance, reducing or eliminating the use of actively supplied energy. The characteristics of passive buildings include doors and windows with high thermal insulation performance, wall enclosure structures, and the organic combination of intelligent fresh air units. These technologies work together to reduce the flow of heat between indoors and outdoors, avoiding energy loss, wall condensation, mold and other problems caused by excessive temperature differences between indoors and outdoors, thereby achieving fresh air inside the house, constant temperature and humidity, and warm in winter and cool in summer. Passive buildings are different from traditional buildings that use actively supplied energy. They mainly rely on passively collected heat to achieve the purpose of insulation, such as solar energy, geothermal energy, indoor heating elements, etc., which can effectively reduce energy consumption.

The existing Chinese patent with publication number CN219952478U discloses a passive low-energy building slope roof structure, which relates to the field of passive (low-energy) building technology design, including: insulating pads isolate the angle steel from the reinforced concrete roof panel, and at the same time use insulation layers and insulation blocks to prevent further heat loss inside the building, waterproof layers can prevent water leakage, and fine stone concrete nail holding layers can be firmly fixed to the roof to avoid slipping and the like.

Currently, passive building sloped roofs are subject to the design requirements of thermal bridge-free structures. Usually, the roofs have no overhanging eaves, or the roof eaves are small (due to the insulation enclosure structure requirements necessary for the overhanging eaves of reinforced concrete structures). It is impossible to achieve the deep eaves effect of traditional sloped roofs, resulting in a single shape of passive building roofs. Passive building technology is difficult to match with public buildings with higher facade requirements, and its development is limited.

Therefore, the inventor believes that it is necessary to provide a sloped roof eaves structure for a passive building, which can achieve a deep roof eaves while meeting the performance requirements of the roof's wind pressure resistance.

Summary of the invention

In view of the defects in the prior art, the object of the present invention is to provide a passive building slope roof eaves structure and a construction method thereof.

A passive building slope roof cantilever eave structure provided by the present invention comprises, arranged in sequence from bottom to top: a slope roof reinforced concrete structural board, a cement mortar leveling layer, a vapor barrier membrane, a first-layer wooden keel, a second-layer wooden keel, a waterproof membrane, a fine stone concrete protective layer, a water-smoothing strip, a tile hanging strip and a roof tile, wherein the first-layer wooden keel is laid parallel to the ridge direction, and the first-layer insulation board is laid in the gaps of the first-layer wooden keels; the second-layer wooden keel is laid perpendicular to the ridge direction, and the second-layer wooden keel protrudes perpendicularly to the ridge direction to form a cantilever eaves main keel and a gutter load-bearing keel, and the second-layer insulation board is laid in the gaps of the second-layer wooden keels.

Preferably, the first-floor wooden keel is fixed by an L-shaped angle steel, and the L-shaped angle steel is fastened to the sloping roof reinforced concrete structural slab by anchor bolts, and the anchor bolts pass through the cement mortar leveling layer and the vapor-isolating membrane to extend to the interior of the sloping roof reinforced concrete structural slab, and asphalt paste is provided at the contact point between the bottom of the L-shaped angle steel and the vapor-isolating membrane.

Preferably, the first-layer wooden keel is fastened to the second-layer wooden keel by anchor bolts, and a keel cover is provided at the end of the main keel of the cantilevered eaves.

Preferably, a keel diagonal brace is provided at the bottom of the main keel of the overhanging eaves.

Preferably, the second insulation board and the first insulation board are laid with staggered seams, and the gaps between the second insulation board and the first insulation board are filled with foamed material.

Preferably, the second layer of insulation board and the waterproof membrane are laid with staggered seams, and the waterproof membrane comprises a self-adhesive waterproof membrane.

Preferably, eaves gutters or aluminum plate eaves sealing are provided at the edges of the eaves gutter load-bearing keels.

Preferably, the first-layer wooden keel and the second-layer wooden keel are both treated with fireproofing and anti-corrosion to achieve Class B fire resistance and corrosion resistance requirements.

Preferably, the cement mortar leveling layer is paved with a thickness of 20 mm, and the fine stone concrete protective layer is paved with a thickness of 40 mm.

Preferably, the water-adjusting strips and the tile-hanging strips are both made of steel keels.

A method for constructing a sloped roof eaves structure of a passive building provided by the present invention comprises the following steps:

Step S1, constructing the cement mortar leveling layer on the reinforced concrete structural slab of the slope roof, and laying a layer of the vapor barrier coiled material on the top;

Step S2, the L-shaped angle steel penetrates into the reinforced concrete structural slab of the slope roof through anchor bolts, and the contact point between the bottom of the L-shaped angle steel and the vapor barrier coil is waterproofed and blocked;

Step S3, laying the first-layer wooden keel treated with fireproofing and anticorrosion in parallel with the ridge direction, and anchoring it with the L-shaped angle steel;

Step S4, dry-laying the first-layer insulation board in the gaps between the first-layer wooden keels, and filling the gaps with foamed material to form a first-layer insulation system;

Step S5, the second layer of wooden keels are nailed on the first layer of thermal insulation system perpendicular to the ridge direction, the second layer of wooden keels are cantilevered perpendicular to the ridge direction and serve as the main keel of the cantilevered eaves and the load-bearing keel of the eaves gutter, and a wind pressure-resistant keel diagonal brace is added at the bottom;

Step S6, dry-laying the second layer of insulation board in the gap between the second layer of wooden keels, staggered with the first layer of insulation board, and filling the gap with foaming material to form a complete insulation system;

Step S7, after the thermal insulation system is completed, the waterproof membrane is laid on top and a fine stone concrete protective layer is poured;

Step S8, laying the following water-adjusting strips, tile-hanging strips and roof tiles in sequence on the fine stone concrete protective layer, constructing eaves gutters, and completing the overall structure.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention adopts a first-layer wooden keel, a second-layer wooden keel and a keel diagonal brace to form a firm and durable roof construction system, which can realize a deep roof eaves and meet the performance requirements of the roof's wind pressure resistance. At the same time, the roof enclosure structure system composed of fire-proof and anti-corrosion wooden keels and thermal insulation is firmly connected to the construction system composed of tiles and steel keels, and has no cold or hot bridge connection in structure, which meets the technical requirements of the slope roof for the design of passive buildings without thermal bridges, and provides technical support for the diversified modeling of the slope roof of passive buildings.

2. The present invention adopts wooden keels, a material with high thermal inertia, to replace steel keels. Periodic temperature changes can be quickly absorbed, and the internal thermal stability is high, which can effectively prevent the thermal bridge effect in key parts. At the same time, the cross-shaped keel arrangement combined with the column grid module forms a more uniform roof stress pattern, ensuring that the eaves bending moment is consistent and the eaves are straight in appearance.

3. The present invention completely separates the roof insulation system composed of wooden keels and insulation materials from the steel keel tile hanging system, thereby avoiding damage to the roof insulation system to the greatest extent and avoiding heat transfer.

4. An additional diagonal brace is added to the bottom of the second-floor cantilever eaves keel to form a stable triangular structure, which can resist the concentrated stress damage caused by repeated positive and negative wind pressures on the roof panel and has good wind pressure resistance.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG1 is a deconstructed view of a roof and eaves unit of a sloped roof eaves structure of a passive building mainly embodied in the present invention;

FIG2 is a detailed cross-sectional view of the roof and cornice according to the present invention;

FIG. 3 is a diagram showing the relationship between keel arrangement and column span modulus according to the present invention.

Reference numerals:

Sloped roof reinforced concrete structural slab 1 Cement mortar leveling layer 2

Vapor barrier membrane 3 L-shaped angle steel 4

Anchor bolt 5 Asphalt paste 6

First floor wooden keel 7 First floor insulation board 8

Foam material 9 Second layer wooden keel 10

Keel diagonal brace 11 Second layer insulation board 12

Waterproof membrane 13 Fine stone concrete protective layer 14

Water-following strip 15 Tile-hanging strip 16

Roof tiles 17 Eaves gutters 18

DETAILED DESCRIPTION

The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1

As shown in Figures 1-3, a sloping roof eaves structure of a passive building provided according to the present invention includes, arranged in sequence from bottom to top: a sloping roof reinforced concrete structural board 1, a cement mortar leveling layer 2, a vapor barrier membrane 3, a first-layer wooden keel 7, a second-layer wooden keel 10, a waterproof membrane 13, a fine stone concrete protective layer 14, a water-adjusting strip 15, a tile hanging strip 16 and a roof tile 17; the first-layer wooden keel 7 is laid parallel to the ridge direction, and the gaps of the first-layer wooden keel 7 are laid with a first-layer insulation board 8, and the gaps are filled with a foam material piece 9; the second-layer wooden keel 10 is laid perpendicular to the ridge direction, and the second-layer wooden keel 10 is cantilevered perpendicular to the ridge direction to form an eaves main keel and an eaves gutter load-bearing keel, and the gaps of the second-layer wooden keel 10 are laid with a second-layer insulation board 12, and the gaps are filled with a foam material piece 9.

The sloping roof and eaves structural design of the passive building of the present application can realize a deep eaves of the roof and meet the technical requirements of the sloping roof for wind pressure resistance, providing technical support for the diversified modeling of the sloping roof of the passive building.

The first floor wooden keel 7 is fixed by L-shaped angle steel 4, and the firmness of the fixing point needs to be ensured. The L-shaped angle steel 4 is fastened to the sloping roof reinforced concrete structure plate 1 by anchor bolts 5. The anchor bolts 5 extend through the cement mortar leveling layer 2 and the vapor barrier coil 3 to the inside of the sloping roof reinforced concrete structure plate 1. Asphalt paste 6 is provided at the contact point between the bottom of the L-shaped angle steel 4 and the vapor barrier coil 3. After the installation of the L-shaped angle steel 4, the vapor barrier coil 3 is penetrated and damaged, and asphalt paste 6 is required to be used at the bottom of the L-shaped angle steel 4 for waterproof sealing. If the vapor barrier layer does not use coils, the vapor barrier layer and the sealing material must be as homogeneous as possible to ensure a tight connection and ensure the overall waterproof performance of the vapor barrier layer.

The second-floor wooden keel 10 is used as both the eaves keel and the eaves gutter load-bearing keel. The keel size specifications need to be calculated according to the eaves depth. The first-floor wooden keel 7 and the second-floor wooden keel 10 are fastened and connected by anchor bolts, and the end of the eaves main keel is used as a keel package. The spacing of the eaves keels is in a modular relationship with the structural span. The center of the structural column coincides with the center of the keel. An oblique keel brace 11 is added to the bottom of the keel at the coincidence, connecting the eaves keel and the structural column to form a stable triangular structure that can resist wind loads.

The second layer insulation board 12 is staggered with the first layer insulation board 8. The second layer insulation board 12 is staggered with the waterproofing membrane 13. Since the waterproofing membrane 13 is in direct contact with the second layer insulation board 12, the waterproofing membrane 13 needs to be a self-adhesive waterproofing membrane, and the membrane is laid in double layers, with the upper and lower layers staggered and waterproof ends are made all around. According to the technical requirements of passive buildings, the insulation board needs to meet a certain thickness and should be laid in double layers. Because it is restricted by the keel on both sides, the insulation board is dry-laid to avoid damage to the lower vapor insulation layer. The size of each layer of insulation board should be regular and the paving direction should be consistent. The paving direction of the second layer of insulation board 12 should be perpendicular to the first layer of insulation board 8, and it needs to be staggered with the first layer of insulation board 8. The gaps between the first and second layers of insulation boards are filled with foam material pieces 9 to avoid cold and hot bridges. At the same time, the insulation board should have high hardness and stability, such as extruded polystyrene board, to ensure that the surface layer is relatively flat after construction. Otherwise, a cement mortar leveling layer should be added above this layer.

The edge of the eaves gutter force keel is provided with an eaves gutter 18 or an aluminum plate sealing eaves.

The first-floor wooden keel 7 and the second-floor wooden keel 10 have both been treated with fireproofing and anti-corrosion to reach the B1-level fire resistance limit and anti-corrosion requirements. The fireproofing should not be lower than the fireproofing grade of the roof insulation material to ensure the overall fireproof performance of the roof. The anti-corrosion treatment is to increase the durability of the wood so that it can reach the same life as the roof insulation. Its size specifications and spacing are calculated based on the roof load and the overall force of the structure.

The water-following strips 15 and the tile-hanging strips 16 are completely separated from the roof insulation system and both use steel keels, so they do not affect the main insulation system.

This application combines the technical requirements of passive building thermal bridge-free design, the technical requirements of roof wind pressure resistance design, and the structural levels and practices of roof insulation, waterproofing, etc., and uses wooden keels and main structures to form a stable deep-eaves passive slope roof structural system. From the perspective of passive building technology, wooden keels, a material with high thermal inertia, are used to replace steel keels. Periodic temperature changes can be quickly absorbed, and the internal thermal stability is high, which can well prevent the thermal bridge effect of key parts. At the same time, the cross-shaped keel arrangement combined with the column grid module forms a relatively uniform roof force mode, ensuring that the eaves bending moment is consistent and the eaves are straight in appearance. The roof insulation system composed of wooden keels and insulation materials is completely separated from the steel keel tile hanging system, which minimizes damage to the roof insulation system and avoids heat transfer. Diagonal braces are added to the bottom of the second-layer eaves keel to form a stable triangular structure, which can resist the concentrated stress damage caused by repeated positive and negative wind pressures on the roof panel, and has good wind pressure resistance.

Example 2

Based on Example 1, a method for constructing a sloped roof eaves structure of a passive building provided by the present invention comprises the following steps:

Step S1, constructing a 20 mm cement mortar leveling layer 2 on the reinforced concrete structural slab 1 of the slope roof, and laying a layer of vapor barrier membrane 3 on the top;

Step S2, the full bridge anchor bolts anchor the L-shaped angle steel 4 and the broken bridge anchor bolts 5 penetrate into the slope roof reinforced concrete structure slab 1, and the contact point between the bottom of the L-shaped angle steel 4 and the vapor barrier coil 3 is waterproofed and blocked;

Step S3, laying the first-layer wooden keel 7 treated with fireproofing and anticorrosion in parallel with the ridge direction, and anchoring it with the L-shaped angle steel 4;

Step S4, dry-laying the first-layer insulation board 8 in the gaps between the first-layer wooden keels 7, and filling the gaps with foaming material pieces 9 to form a first-layer insulation system;

Step S5, a second layer of wooden keels 10, i.e., eaves keels, are nailed on the first layer of thermal insulation system perpendicular to the ridge direction. The second layer of wooden keels 10 are cantilevered perpendicular to the ridge direction and serve as the main eaves keel and the eaves gutter load-bearing keel. A wind-resistant keel diagonal brace 11 is added to the bottom of some keels;

Step S6, dry-laying the second layer of insulation board 12 in the gap between the second layer of wooden keels 10, staggered with the first layer of insulation board 8, and filling the gap with foam material pieces 9 to form a complete insulation system;

Step S7, after the thermal insulation system is completed, a waterproof membrane 13 is laid on top and a fine stone concrete protective layer 14 is poured;

Step S8, the following are laid in sequence on the fine stone concrete protective layer 14: water-adjusting strips 15, tile-hanging strips 16 and roofing tiles 17, and the eaves gutters 18 are constructed, and the overall structure is completed.

In step S1, the reinforced concrete structural slab 1 of the slope roof is first leveled, and after the protruding foreign objects are removed and cleaned, a cement mortar leveling layer 2 is constructed, and after the mortar is dried to the required moisture content of the specification, the vapor barrier membrane 3 is laid.

The L-shaped angle steel 4 of step S2 needs to be positioned in advance on the vapor barrier membrane 3 according to the calculated keel spacing and the number of fixing points, and fixed according to the position of the positioning line. The L-shaped angle steel 4 is fixed to the slope roof reinforced concrete structure plate 1 through the thermal break anchor bolt 5. The thermal break anchor bolt 5 needs to ensure a certain length. The thermal break anchor bolt 5 needs to be rooted in the slope roof reinforced concrete structure plate 1, but cannot penetrate the slope roof reinforced concrete structure plate 1, and form a reliable connection with the slope roof reinforced concrete structure plate 1.

When the L-shaped angle steel 4 in step S2 is fixed, the anchor bolt 5 penetrates the vapor barrier layer and the cement mortar leveling layer 2 and is rooted in the reinforced concrete structural slab 1 of the slope roof. The contact point between the bottom of the L-shaped angle steel 4 and the vapor barrier membrane 3 is waterproofly sealed with asphalt paste 6 to ensure the overall waterproof performance of the vapor barrier layer.

The first layer of insulation board 8 in step S4 needs to be dry-laid to avoid damage to the vapor barrier layer. The insulation board should be regular in size and laid in the same direction. The gaps should be filled with foam material pieces 9 to avoid the occurrence of cold and hot bridges.

The laying direction of the second layer insulation board 12 in step S6 should be perpendicular to the first layer insulation board 8, and it needs to be laid with staggered seams with the first layer insulation board 8, and the gaps are filled with foam material pieces 9 to avoid the occurrence of cold and hot bridges.

After the thermal insulation layer of step S7 is laid, a double layer of waterproofing membrane 13 is laid on top thereof with staggered seams. The waterproofing membrane 13 needs to be self-adhesive.

After the waterproof layer of step S7 is laid, a 40mm fine stone concrete protective layer 14 is poured. Before pouring the concrete, wooden keels and secondary keels are used to enclose the boundaries, and steel mesh is added inside to prevent cracking. The spacing of the water-adjusting strips 15 is determined according to the selected tile size, and bolts are embedded in the protective layer to ensure the integrity of the protective layer and avoid damaging the underlying waterproof layer by directly fixing the bolts.

The water-following strip 15 and the tile-hanging strip 16 in step S8 are completely separated from the roof insulation system, and both use steel keels, so no hot and cold bridges are generated. The water-following strip 15 is welded and fixed to the embedded angle steel of the protective layer, and the tile-hanging strip 16 is positioned by pulling a line according to the size of the selected roof tile 17, and is welded and fixed to the water-following strip 15. After the installation is completed, the tiles are hung, and the eaves gutter 18 is fixed on the eaves keel after the tile construction is completed, and the eaves are closed with aluminum plates according to the facade shape. If there is no organized drainage requirement, the eaves gutter 18 can be cancelled, and only the aluminum plate eaves can be used.

The sloping roof and eaves structural design of the passive building of the present application uses a first-layer wooden keel 7, a second-layer wooden keel 10 and a keel diagonal brace 11 to form a firm and durable roof structural system, which meets the performance requirements of the roof's wind pressure resistance. At the same time, the roof enclosure structure system composed of fire-proof and anti-corrosion wooden keels and thermal insulation is firmly connected to the structural system composed of tiles and steel keels, and has no cold or hot bridge connection in structure, which meets the technical requirements of the sloping roof for the passive building's thermal bridge-free design, and provides technical support for the diversified modeling of the sloping roof of the passive building.

In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims (10)

1. A passive building slope roof cantilever structure, characterized in that it comprises, arranged in order from bottom to top: a slope roof reinforced concrete structural board (1), a cement mortar leveling layer (2), a vapor barrier coiled material (3), a first-layer wooden keel (7), a second-layer wooden keel (10), a waterproof coiled material (13), a fine stone concrete protective layer (14), a water-smoothing strip (15), a tile hanging strip (16) and a roof tile (17), wherein the first-layer wooden keel (7) is laid parallel to the ridge direction, and a first-layer insulation board (8) is laid in the gap between the first-layer wooden keels (7); The second layer of wooden keels (10) are laid perpendicularly to the ridge direction, and the second layer of wooden keels (10) are cantilevered perpendicularly to the ridge direction to form a cantilevered eaves main keel and eaves gutter load-bearing keel, and the gap between the second layer of wooden keels (10) is laid with a second layer of insulation board (12). 2. The sloping roof eaves structure of a passive building as described in claim 1 is characterized in that the first-floor wooden keel (7) is fixed by an L-shaped angle steel (4), and the L-shaped angle steel (4) is fastened to the sloping roof reinforced concrete structural plate (1) by an anchor bolt (5), and the anchor bolt (5) passes through the cement mortar leveling layer (2) and the vapor barrier roll (3) and extends to the interior of the sloping roof reinforced concrete structural plate (1), and asphalt paste (6) is provided at the contact point between the bottom of the L-shaped angle steel (4) and the vapor barrier roll (3). 3. The sloping roof eaves structure of a passive building as described in claim 1 is characterized in that the first-layer wooden keel (7) and the second-layer wooden keel (10) are fastened together by anchor bolts, and a keel cover is provided at the end of the main keel of the eaves. 4. The passive building slope roof eaves structure as claimed in claim 1, characterized in that a keel diagonal brace (11) is provided at the bottom of the main keel of the eaves. 5. The sloping roof eaves structure of a passive building as described in claim 1 is characterized in that the second layer of insulation board (12) and the first layer of insulation board (8) are laid with staggered seams, and the gaps between the second layer of insulation board (12) and the first layer of insulation board (8) are filled with foam material pieces (9). 6. The sloping roof eaves structure of a passive building as described in claim 1 is characterized in that the second layer of insulation board (12) and the waterproof membrane (13) are laid with staggered seams, and the waterproof membrane (13) comprises a self-adhesive waterproof membrane. 7. The passive building slope roof overhanging eaves structure as claimed in claim 1, characterized in that an eaves gutter (18) or an aluminum plate eaves sealing is provided at the edge of the eaves gutter load-bearing keel. 8. The sloping roof eaves structure of a passive building as described in claim 1 is characterized in that the first-layer wooden keel (7) and the second-layer wooden keel (10) are both treated with fireproofing and anti-corrosion to achieve B1 grade fire resistance and anti-corrosion requirements. 9. The passive building slope roof eaves structure according to claim 1, characterized in that the water-adjusting strip (15) and the tile hanging strip (16) are both made of steel keels. 10. A method for constructing a sloped roof eave structure of a passive building according to any one of claims 1 to 9, characterized in that it comprises the following steps: Step S1, constructing the cement mortar leveling layer (2) on the slope roof reinforced concrete structural slab (1), and laying a layer of the vapor barrier coiled material (3) on the cement mortar leveling layer (2); Step S2, the L-shaped angle steel (4) penetrates into the slope roof reinforced concrete structure slab (1) through the anchor bolt (5), and the contact point between the bottom of the L-shaped angle steel (4) and the vapor barrier coil (3) is waterproofed and sealed; Step S3, laying the first-layer wooden keel (7) treated with fireproofing and anticorrosion in parallel with the ridge direction, and anchoring it with the L-shaped angle steel (4); Step S4, dry-laying the first-layer insulation board (8) in the gaps between the first-layer wooden keels (7), and filling the gaps with foamed material pieces (9) to form a first-layer insulation system; Step S5, the second-layer wooden keel (10) is nailed on the first-layer insulation system perpendicular to the ridge direction, the second-layer wooden keel (10) is cantilevered perpendicular to the ridge direction and serves as the main keel of the eaves and the load-bearing keel of the eaves gutter, and a wind-resistant keel diagonal brace (11) is added at the bottom; Step S6, dry-laying the second layer of insulation board (12) in the gap between the second layer of wooden keels (10), laying them staggered with the first layer of insulation board (8), and filling the gap with foam material pieces (9) to form a complete insulation system; Step S7, after the thermal insulation system is completed, the waterproof coiled material (13) is laid on top and a fine stone concrete protective layer (14) is poured; Step S8, laying the following water-adjusting strips (15), the tile-hanging strips (16) and the roof tiles (17) in sequence on the fine stone concrete protective layer (14), constructing the eaves gutter (18), and the overall structure is completed.