[0043] The present invention will be further described below in conjunction with the drawings and embodiments: figure 1 Shown in the figure is the cross section of the waterproof parapet wall of light steel building. It is used for flat roofs with parapet walls for civil buildings. Because the leakage of flat roofs with parapet walls has been a long-term problem for civil buildings, it is impossible to use asphalt and mortar to treat To meet the construction requirements of dry work, the use of waterproofing agents cannot meet the long-term use of anti-cracking and waterproof effects.
[0044] The building skeleton of the present invention consists of cold-formed thin-walled light steel keels 10 forming the wall frame 1 of the wall and the roof truss 3 of the building roof. The truss and the wall frame are fixedly connected by roof truss supports 4, and the roof truss supports 4 It is usually a metal folding piece, which is fixedly connected to the wall frame and the truss at the same time by bolts. The wall frame is set vertically. Usually the outer wall of the building and the parapet wall are integrated, and the roof truss of the building top tilts down horizontally to the vertical wall frame. With a slope of 0.7%~2%, the wall frame 1 is 0.8~2.5m higher than the roof of the building as a parapet.
[0045] Such as figure 2 , Fill the glass insulation wool 8 between the space of the light steel keel 10 in the center of the wall. Outside the glass insulation wool 8 and the wall frame 1, the outer side of the wall (including the outer side of the parapet) is sequentially provided with OSB boards from the inside to the outside 7. Unidirectional breathing paper 6, waterproof coiled material 9 and fiber cement board 5; the inner side of the parapet wall is provided with OSB board 7, unidirectional breathing paper 6, fiber cement board 5 and waterproof coiled material 9 from the inside to the outside; the parapet wall OSB board 7, one-way breathing paper 6, waterproof coiled material patch 17, and fiber cement board 5 are arranged on the roof from the inside to the outside; the building roof is arranged with OSB board 7, one-way breathing paper 6, and extruded thermal insulation from the inside to the outside. Board 12 and waterproof coiled material 9, when the waterproof coiled material 9 is laid to the junction of the roof and the parapet, turn up from the roof and close to the inner side of the parapet, and turn over the inner side of the parapet and the top of the parapet to the outer side of the parapet. Turn over the outer side of the parapet wall to at least 150mm from the top surface of the parapet wall, and lay the waterproof coiled material in a sealed manner. When lightning protection steel bars are installed on the top of the parapet wall, a waterproof coiled material patch is additionally laid on the top of the parapet wall here. The waterproof coiled material patch 17 is laid along the top of the parapet wall and the waterproof coiled material patch 17 is at least 150mm out of the parapet wall. The waterproof coiled material patch 17 overlaps the waterproof coiled material laid on the inner side of the parapet wall, and the overlapped part is welded by hot air into a sealed body.
[0046] OSB board is used as a structural reinforcement board and a flat wall for the wall; glass insulation wool is the wall insulation layer; the extruded insulation board is the roof insulation layer; the unidirectional breathing paper is the moisture-proof layer, and the fiber cement board is the main waterproof The PVC waterproof membrane is the main waterproof layer on the inner side of the roof and parapet.
[0047] The laying of OSB board 7 and extruded insulation board 12 is full without leaving gaps, which means that the distance between adjacent OSB boards 7 or between adjacent extruded insulation boards 12 is as close as possible. Arranged in the same plane, there are inevitably gaps between adjacent plates, but they are not intentionally spaced gaps.
[0048] The OSB board 7 is fixedly connected to the wall frame 1 or the truss 3 through self-tapping screws, the fiber cement board 5 of the wall is fixedly connected to the OSB board 7 through self-tapping screws, and the extruded insulation board 12 on the building roof is connected to the OSB through self-tapping screws. The board 7 is fixedly connected, and the one-way breathing paper 6 is fixedly connected to the OSB board 7 through double-sided tape.
[0049] The split seams of adjacent OSB boards 7 and the adjacent fiber cement boards 5 are arranged in staggered seams. Generally, the splicing seams of adjacent fiber cement boards 5 are arranged in the middle position between the splicing seams of two adjacent OSB boards 7. The fiber cement board 5 is a key waterproof material. The surface of the fiber cement board 5 is coated with real stone paint, and the joints between adjacent fiber cement boards 5 are filled with oily waterproof sealing paste.
[0050] On the parapet wall at the height of the roof of the building, there is a falling bucket 14 penetrating the inner and outer sides of the parapet wall. The inner end of the falling bucket 14 is open at the bottom end of the inner side of the parapet wall. The outer end of the falling bucket is lower than the inner end opening, and the outer end The opening is downward and is used to discharge water from the house area. The falling bucket is embedded in the holes reserved for the falling bucket on each layer of the wall. The inner side of the opening on the inner side of the parapet wall is turned inward by the cut of the waterproof coil, and the adhesive and supplementary PVC material are at least Continuous sealing and pasting with a depth of 200mm to ensure waterproof sealing.
[0051] As an embodiment, it is necessary to install lightning protection facilities on the roof surface. On the top of the parapet wall, the fiber cement board 5, the waterproof coiled material 9, the one-way breathing paper 6 and the OSB board 7 are installed with the light steel keel 10 vertically inward. Welded lightning protection steel bar 11.
[0052] A construction method for the waterproof parapet wall of light steel building is used for the building skeleton of the light steel keel structure to carry out all-dry construction, according to the following steps:
[0053] In the first step, the wall frame 1 and the truss 3 of the light steel keel assembled in the factory are assembled into the wall and roof keel of the house building through self-tapping nails and roof truss supports 4 at the construction site. The light steel keel is cold Curved thin-walled light steel profile, the roof of the building is a flat roof, and the roof faces the wall with a horizontal slope of 0.7% to 2% to facilitate drainage. The parapet 1 is 0.8 to 2.5m higher than the roof of the building.
[0054] The second step is to use self-tapping nails on the outer side of the wall including the parapet wall, the top of the parapet wall and the inner side of the parapet wall to fix the 12mm-thick OSB board 7 on the wall frame 1, and use 18mm thickness on the roof truss 3 The OSB board 7 is fixed on the truss 3 with self-tapping screws, and the adjacent OSB boards are tightly spliced. Wooden particle board is used as a structural reinforcement board and a wall surface, so the whole is required to be flat and continuous. The pre-opened OSB board is used in the preset installation position of the sink.
[0055] Set up lightning protection steel bars on the top of the parapet wall, and use lightning protection steel bar 11 Galvanized lightning protection steel bars, before fixing the OSB board 7 on the parapet wall, use lightning protection steel bars 11 to vertically pass through the OSB board 7 in advance, and then weld the lower end of the lightning protection steel bars 11 to the light steel keel 10 on the parapet wall. After the steel bars are welded , Move the OSB board 7 penetrated by the lightning protection steel bar in front to the top of the parapet wall along the penetrated hole, and after it is flush with both sides of the parapet wall, fix it on the top of the light steel keel of the parapet wall with self-tapping screws.
[0056] The third step is to cover the one-way breathing paper 6 with double-sided tape on the outside of the OSB board 7. The unidirectional breathing paper acts as a moisture-proof layer and also protects the OSB board 7. The one-way breathing paper 6 is covered with no gaps outside the OSB board 7, including the roof, the outer wall, the inner, outer and top of the parapet.
[0057] The fourth step is to lay fiber cement boards on the inner side of the parapet as the main waterproof layer of the parapet. The fiber cement board is pre-coated with real stone paint, and the 8mm-thick fiber cement board 5 is fixed on the OSB board 7 with self-tapping nails on the inner side of the parapet wall. The fiber cement board 5 and OSB board 7 are staggered and installed; Oily waterproof sealing paste is filled between adjacent fiber cement boards 5.
[0058] The fifth step is to lay the extruded insulation board on the roof as the roof insulation layer. The 30mm-thick XPS extruded thermal insulation board 12 is fixed on the OSB board 7 of the roof with self-tapping screws. The adjacent extruded thermal insulation boards 12 are tightly spliced, and the extruded thermal insulation board 12 and the OSB board 7 are installed in staggered seams. Ensure waterproof and airtight.
[0059] The sixth step is to lay the PVC waterproof membrane, which is the main waterproof layer on the roof and the inner side of the parapet. Install 1.2mm-thick waterproof coiled material 9 on the roof of the building and the inner side of the parapet. On the top of the parapet with lightning protection steel bars, lay the waterproof coiled material patch 17 separately. The waterproof coiled material patch 17 is laid on the top surface of the parapet for lightning protection. At the steel bar, the flexible PVC waterproof membrane is penetrated by the lightning rod, and the hole diameter of the waterproof membrane patch is smaller than the outer diameter of the lightning rod, so that there is interference between the hole of the waterproof membrane patch and the lightning rod In cooperation, the flexible PVC waterproof membrane patch is attached to the outer side of the lightning protection steel bar to prevent water leakage. The outer edge of the waterproof coiled material patch 17 hangs at least 150mm on the outside of the parapet wall. The waterproof coiled material on the inner side of the parapet wall overlaps with the waterproof coiled material patch 17, and the hot air torch is used to continuously seal and weld together to form the outer wall of the house. A closed enclosure system.
[0060] Step 7: Pave 8mm thick fiber cement board 5 on the outside of the wall and the top of the parapet. The fiber cement board is pre-coated with real stone paint. After laying, the joints of the fiber cement board are filled and sealed with oily waterproof sealing paste. It can be seen that the fiber cement board 5 on the outer side of the wall and the top of the parapet is paved after the waterproof coiled material, and the waterproof coiled material on the outer side of the wall and the top of the parapet is fastened to the unidirectional breathing paper. The fiber cement board 5 on the top of the parapet wall is laid with an inward slope of 1% to 2% to prevent water accumulation.
[0061] The pre-opened fiber cement board is used in the preset installation position of the sink. The openings are sleeved outside the lightning protection steel bars, and the pores are filled with oily waterproof sealing paste, and fixed on the OSB board 7 with self-tapping screws.
[0062] The eighth step is to install the sink 14 at the junction between the inner side of the parapet wall and the roof of the building. The outer outlet of the sink 14 faces downwards, and the inner entrance is flush with the inner side of the parapet wall. The outer outlet is 0-30mm lower than the inner inlet and is used to discharge the product. water. The water bucket passes through the reserved holes of the OSB board and the fiber cement board. The waterproof membrane is turned inward at the cut mouth of the water bucket, and the adhesive is glued to the inner side of the stainless steel water bucket. If the cut is pasted, the adjacent waterproof membrane end If there is a gap between the cut openings, add a waterproof roll material, and overlap with the completed waterproof roll material, and cover the side wall at least 200mm deep in the inlet of the sink.
[0063] Step 9: On the inner side of the wall under the roof of the building, spread glass insulation wool 8 between the light steel keels of the wall as an insulation layer, and then install the indoor fiber cement board on the inner and outer surfaces of the wall. Then carry out interior wall decoration.
