Is it normal for a custom winding staircase to take nearly a month to finish?

Three to four weeks is a very standard timeframe for a custom, multi-level concrete project on a steep grade in Southern California. Working on a hillside adds a massive amount of labor that isn't immediately obvious to most homeowners. Every single bag of concrete, piece of rebar, and flagstone has to be hauled up or down that slope, often by hand or with a power buggy, wich easily doubles the time it takes to move materials compared to a flat driveway job.

Setting those wooden forms on a winding path requires precise carpentry. If they don't get the pitch and the rise-to-run ratio exactly right, the stairs will be a tripping hazard or look crooked once the pour is finished. Embedding flagstone into a fresh pour as a border isn't just about dropping stones into wet mud. They have to hand-tool the edges, wash the stones to prevent haze, and ensure the heights are perfectly flush so you don't stub your toe. It is tedious work that can't be rushed if you want it to look like the path to enlightenment rather than a DIY disaster.

Regarding the mess, concrete sites are notoriously dirty until the very final day. Those wooden forms stay in place to support the weight and keep the moisture in while the concrete cures. If they pull them too early, the edges coud slump or crack. The scrap wood and tools are a pain to look at, but they probably need them for the finishing touches or for bracing the next sections. As long as you have a crew of three or four guys consistently showing up and making progress, you aren't being taken for a ride. The last week of a job like this usually involves stripping all the forms, pressure washing the residue, and doing the final site cleanup. It’ll look like a disaster zone right up until the moment they haul away the last piece of lumber and you see the finished masonry against your yard.

I did a similar flagstone-edged flight two summers ago and the mess is what killed me. I thought they were being lazy with the scrap wood, but the second they pulled those forms too early on my landing, the corner blew out and we had to patch it. It looked terrible. Let them keep the trash there for now becuase moving it back and forth just costs you more in labor hours. One thing that saved me was asking them to do a 'pre-wash' on the flagstone before the final cure so the grout haze didn't bake in. Check if they've got a plan for that or you'll be scrubbing it yourself for months.

That's a relief to hear about the timeline. I honestly don't know much about masonry, so I was worried they were just dragging their feet. Since you mentioned the forms stay on for moisture, does the Southern California heat affect how fast it cures? I'm worried it might dry out too quick if it's a hot week. Also, when they finally strip those boards, is it normal for the concrete to look a little patchy or discolored at first, or should it look perfect right away?

Seen this a hundred times in the Valley. If you're worried about that SoCal sun baking your mud, tell 'em to throw some wet burlap over it. We used to keep those sacks soaking all day to stop the 'hairline mapping' you get when it flashes too fast. As for those stones, make sure they aren't just slapping them on. They need a good slurry coat or they'll pop right out in a year. If the forms look like a bird's nest, it usually means they're bracing for a heavy pour on that slope. Just let 'em work. I've seen guys rush the strip and ruin a perfectly good finish because the cream hadn't set.