Concrete steps along exterior wall

Question

I'm building concrete steps along the hillside parallel to my exterior wall. Lower part of the wall is concrete foundation and upper part is stucco/felt paper/plywood and wall studs. Part of the steps will be against the stucco.

I know I need a water barrier between the concrete and the stucco part of the wall. Can I just use felt paper? Or self-adhered flashing? I was thinking originally of using galvanized steel roll along the wall but it would be a pain to cut it to match the steps along the wall.

Note : I've used rubber paint to reseal my foundation and I'll have a french drain under the concrete steps.

Also, this is in Socal (not much rain), and this wall is covered by a large eave (so water is not coming down that wall).

Thanks.

Answer 1

Of the 3 options you mentioned, self-adhered flashing is the best option for a barrier. However, I would take care to have a metal dripper above the flashing to ensure rainwater along the wall does not seep down between the flashing and the stucco.