If installed correctly by professionals, not
Smarti99 schrieb:
I skip lintels and install the roller shutters directly below the concrete ceiling. That only makes sense in this context: the ceiling does not need a lintel, and here there is nothing left to support above the shutter box.
Smarti99 schrieb:
Or why shouldn't windows with lintels also be installed properly? Whether with or without lintels, proper installation of windows is a matter of chance. The success rate in this area leaves much to be desired.
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