Head Elements
U-blocks are used to make heads over window and door openings. They create
a thermal insulation layer and render additional falsework unnecessary.
U-blocks should be placed on a previously prepared under-propped base, from the bottom. Afterwards, insert reinforcement elements as in the documentation and cover with concrete.
In the case of window and door openings in exterior walls, U-blocks should be additionally insulated.

How to build?
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