Moisture roller shutter box - cause investigation

  • Erstellt am 2024-06-02 23:21:47

wusti_recher

2024-06-02 23:21:47
  • #1
Good day dear experts,
my wife and I have bought a house, built in 2000. Building description attached.
On the weather side of the house, some of the roller shutters (not all) have moisture damage, see pictures. The plaster/cladding of the roller shutter box is porous and can be damaged with a finger.
A friendly expert saw no damage on the outside. He suspects it resulted from convection over 24 years and only became so bad because no one ever took care of it. The previous owner was not a craftsman. I am surprised that the damage above the roller shutter box is so severe, although the styrofoam seems to be intact and continuous. Possibly the moisture also comes from the windowsill above?
What is your assessment of the cause of the damage?
My layman approach would be:

    [*]to scrape off the porous "plaster" and re-plaster it with moisture-resistant mortar

to smear.

    [*]to replace the cover plate facing the room (which material?),
    [*]to seal the joints between the side parts and the styrofoam with silicone

and to tape the joints of the inspection cover with sealing tape.
Best regards from Wuppertal.
 

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