This issue we will continue to introduce basic interface treatment and hanging of elastic control lines in external wall insulation rockwool system construction

     2.2 Basic interface treatment
     Walls should be cleaned, cleaned of oil stains, and cleaned of floating ash, etc. The loose and weathered parts of the wall should be removed. When the protrusions on the wall surface are larger than 10mm, they should be removed.
     When plugging the holes of removed scaffold, the debris, dust and other objects in the holes should be cleaned up, watered and moistened, and then filled with 1:3 cement mortar.
     2.3 Hanging vertical and elastic control line
     The method of hanging the line is determined by the height of the building. High-rise buildings and super-high-rise buildings can use the large corner of the wall, both sides of the door and window, and use the theodolite to make a straight line to find the vertical. For multi-storey buildings or medium and high-rise buildings, they can be suspended vertically from the top floor with a large wire, stretched with low carbon steel wire to find rules, and the horizontal horizontal line can be controlled according to the floor elevation or 32_+0.000 upward 500mm line as the horizontal reference line. According to the adjustment of the vertical line and the thickness of the insulation, the control lines are bounced on both sides of the big corner of the frame at each step, and then the horizontal line is pulled to make the mark block.     
     Next issue we will continue to introduce installation of insulation rockwool.