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How to ensure the flatness of the rock wool thin plaster external insulation system

2021-02-19

 Figure 1: Rock wool external insulation system with poor surface flatness


1. Be sure to choose rock wool board or rock wool tape that meets the design requirements and has a size deviation of less than 1%. Rock wool with low bulk density and large size deviation is like bread, it is difficult to guarantee the flatness of the final survival.

Picture 2: Rock wool board with higher flatness

2. Use a special knife to cut rock wool to ensure that the edge of the board is straight.

3. Pay-off is a crucial part of rock wool insulation. Make sure that there are lines on both sides of each window. And different thickness of insulation layer should also be put in different lines.
Figure 4: Styrofoam leveling

5. Paste the corner protector on the external corners, and apply the first surface mortar after installation.

6. After the construction of the first pass of surface mortar and hanging net is completed, the second pass of mortar can be applied after leveling treatment.
Figure 5: Lines for hanging external corners

7. Use a ruler to check the flatness every time before hanging the net.

8. Do not damage the rock wool during the construction process.
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