How should I approach screwing? I will use formplywood and brace the risers, among other things, with 45x70 or 45x95. I therefore need to both screw the studs onto the formplywood (can be done from the outside) and the different plywood parts (must partially be done from the inside). How do you avoid marks in the concrete from the screw heads? There should theoretically be small "crosses" protruding from the cross slot in the screw head, or do these break off when demolding?
Am I thinking correctly or not? I was thinking of using chipboard screws - right or wrong?
