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Clay tiles are installed on a roof by spreading a thin layer of concrete on the roof and setting the concave face of the tile into the concrete.
I believe you mean the ceiling, which is concrete.
The best concrete for making a concrete bench is Bench concrete.
M20
marble and concrete slabs.
elephant
The various mixtures for making concrete are,CementFine AggregateCoarse AggregateWaterAdmixtures (in some cases)
it is called a roof
The roof
Roof
It is what you called the planning for the roof.
The steel rods are there to strengthen the concrete - making it reinforced concrete.