It is not a good idea.
Pouring concrete against siding.
Concrete should never be poured up against steel siding and or trim.
The best thing to do and it s the code in va is to put aluminum coil in between the wood and the concrete.
It is not a good idea.
One of the most common builder errors that home inspectors have to deal with is the installation of concrete surfaces over the top of wood siding or any kind of siding for that matter.
It s never going to be a good idea to pour a concrete porch or set of stairs next to wood siding or structural framing.
You can but you should put expansion board there.
In addition when the concrete expand you want to.
Moisture can accumulate in concrete and then absorb into the wood and if this.