was another topic and the leaking switch the electric shutters and sometimes a few outlets that are placed in external walls. This were already at the first thermography diagnosed, but now only done hopefully for good. This time examples of where and how hard it "pulls"
is not entirely clear why the switches are not sealed. Either the empty pipe at the shutter box is not sealed (should it be but according to Carpenter), or the empty pipe in the wall draws air through unbonded joints in aerated concrete masonry (ie the empty tube was not clean, and had been plastered into the wall).
to solve the issue, were now Wall inserts with "overcoats" marked, in the hope that they are therefore dense. Whether it succeeds will then show the third thermography.
the "overcoat"
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