I would advise locating a vinyl siding company and getting them to break some scraps that they ve laying around about an inch much higher than the concrete will be poured and as far out from the house as the scraps will go.
Pour concrete against wall.
Create contraction joints every 4 6 feet.
The addition of reinforcing steel to either wall system complicates the issue.
Concrete should never be poured up against steel siding and or trim.
The hollow block wall is depending solely on the strength of the thin mortar bed between each concrete block.
Did you watch or four video you see the whole job get done from start to fi.
We go over all the necessary steps for your concrete slab to come out perfect.
Some contractors will put expansion joint material against the brick because the concrete will crack away from the brick.
In this video we show you how to pour your basic 16 x 12 concrete slab.
See below for more information on contraction joints.
If the wall exceeds four feet in height footings should be poured separately.
2of4 in this video ninja screeds the extension to the driveway all in real time.
The expansion joint material ejm will eventually deteriorate and leave you a bigger gap then what the concrete settling away from the brick will.
You will be fine pouring concrete up to the brick.
Allow concrete to cure.