Construction technology for preventing cracking of exterior heat-insulation coatings and veneers

Abstract

The invention discloses a construction technology for preventing cracking of exterior heat-insulation coatings and veneers. The construction technology includes steps of A, snapping bottom control lines, and in other words, snapping the horizontal control lines at joints of an outdoor slope protection foundation and a wall along the periphery of a building; B, constructing heat-insulation layers made of polystyrene plates according to a basic sequence; C, reserving air passages and mounting suction holes and exhaust holes, in other words, reserving the first horizontal air passages with the widths of 20mm at certain positions below second-storey windows of the building, forming the suction holes in certain positions of the air passages, reserving the second horizontal air passages with the widths of 20mm on the upper portions of top-storey windows, forming the exhaust holes in certain positions on the air passages and sealing the outer sides of the air passages by wedge-shaped battens made of EPS (expandable polystyrene) plates; D, adhering damp-proof courses for damp-proof treatment at the joints of the outdoor slope protection foundation and the wall. The horizontal control lines are datum lines for constructing damp-proof coiled materials. The basic sequence includes snapping doors and the windows, vertical control lines and the like; hanging the datum lines and adhering, turning and wrapping gridding cloth; adhering the polystyrene plates; mounting anchoring parts; plastering mortar and laying and pressing the gridding cloth. The certain positions where the first horizontal air passages with the widths of 20mm are reserved are separated from the second-storey windows of the building by distances of 300mm. The certain positions where the suction holes are formed are close to the corresponding windows. The certain positions where the exhaust holes are formed vertically correspond to the suction holes.

Description

technical field [0001] The invention relates to a construction technique for building high-rise exterior walls, in particular to a preventive external thermal insulation coating [0002] The invention relates to a cracking construction technology for material decoration, which belongs to the technical field of building construction. Background technique [0003] With the rapid development of building energy conservation, external wall thermal insulation technology has been widely used in the world, among which the earliest application time and the largest application area is the molded polystyrene board (EPS) thin plaster external wall thermal insulation system. The EPS external thermal insulation system came out in Germany 50 years ago and became popular in Europe and the United States. Our country has studied and applied this advanced technology for 20 years, and the number of engineering applications has continued to expand, and good results have been achieved. [00...

AI Technical Summary

Problems solved by technology

For some multi-storey energy-saving buildings, after the completion of the project (especially the project started and completed in the same year) during the heating period, the humidity in the cavity formed by the external wall insulation layer and the adhesive layer and the insulation layer seriously exceeded the standard (〔△w〕>15% ), in the early spring of the second year after delivery, cracking and peeling occurred to varying degrees, requiring repeated repairs, which not only affected the insulation quality of the wall, but also wasted financial and material resources and increased construction costs

Images