For a number of reasons I need to lay 100mm of premix concrete on top of my existing concrete garage floor(6m x 6m).
Do I need to leave any expansion gaps?
But my real question is:
Since it is inside a building, what formwork do I need and where do I lay it?
How do I level and tamp it? Do I just walk over the wet concrete and work out towards the door since I can't get at it from the sides?