Quote:
Originally Posted by mr. snazzy pants
I think those leave a smoother surface on the concrete than plywood would. This is the underground parking and the concrete ceiling will be exposed, don't want wood-grain patterns being left.
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Isn't that drainage panning?
That's for drainage. It's a permeable layer for water to go around the outside of the final concrete. The stuff that's on that wall right now is shotcrete, which is generally just temporary support for the excavation, keeping the dirt from falling in the pit.
Edit: Nevemind, wrong black panels.