Open- or closed-cell insulation floor slab lateral

  • Erstellt am 2016-06-26 12:41:21

ningerning

2016-06-26 12:41:21
  • #1
We have received the list of individual services from our slab company. As builders, we now have to decide between two options for the lateral insulation of the slab. However, I do not find these options clear; they rather confuse me. Here is the text from the company's letter:
"The builder was explicitly informed that the insulation protruding above the ground (air area) must have a plasterable surface. This means that a closed-cell waffle board (which may not extend even 5 cm below the ground—only usable above ground) should be installed or an open-cell white insulation should be applied. This in turn means that this material can only be installed as an open-cell insulation board.
The closed-cell waffle board is not an option because the exact boundary between the air area and new soil cannot be precisely determined.
Therefore, a high-quality closed-cell board without a plasterable surface will also be used above the soil area. This means that before plastering the insulation surface (above soil), the insulation must be roughened by hand with BHS.
Disadvantage: According to regulations, the plasterer would have the right to raise concerns and declare that he assumes no liability for the plaster."
I do not understand why "a closed-cell waffle board is not an option," but at the same time it is written that "above the soil a high-quality closed-cell board should be used," with the disadvantage that the plasterer may raise concerns???
I am at a loss!!! Maybe a knowledgeable expert can help me understand this and give me advice!
Many thanks in advance!
 

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