I want to put down a floor area adjacent to the front of the house wall (just below the front house windows). It will be 1.70m deep from the house wall and 4m in breadth. It's only ever going to be used to stand on or deck chairs put on it.
On the smaller edge will be the path leading to the front door. Another edge is the front wall of the house. The other two edges I'm going to have to make.
The path to the door is made of pavement flags about 50mm thick.
I'm thinking if I put some hardcore down (actually broken up pavement flags) to the level of the bottom of the path pavement flags leading to the door, that will leave a shallow pit 50mm deep if I concrete up to the level of the path which I intend to do. As for the two sides I need to bound, I shall use wood planking. I don't know if I have to buy special wood for this purpose, or can I just use regular untreated unplaned wood?
I don't want to use more concrete than I need to. I'm thinking 50mm thick is about right in the circumstances. Well, that's my plan. Is it about right? TIA.