In Austria and Switzerland, a blind stick or mounting frame is a frame that is installed as a so-called "scaffolding" for door and window openings in the shell and protects the window from moisture ingress.
As a rule, a blind cane consists of wooden planks, squared timber or even more durable, artificial materials such as Purenit, which is a highly compressed material based on polyurethane rigid foam.
The door lining or frame is then mounted in the blind stock, the upper bolt can also act as a (temporary) lintel.
The use of these lintels was particularly common before the introduction of prefabricated lintels in masonry construction; the blind stick took over the function of the load-bearing lintel until the mortar hardened.
Blind canes can also be plastered so that the windows can only be installed after completion of the plastering work and are thus protected from damage.
Likewise, when installing windows in the insulation plane, it makes sense to first attach a blind stick to the outside of the wall opening in order to be able to attach the window to this frame.
☛ see also expert knowledge "window connection"
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