I rolled Haering 2x. I didn’t even think of using a different base plaster. In my opinion, the base plaster should have a certain grain size, otherwise the Haering won’t look so nicely even. After one coat, it didn’t look good... But I worked on an existing surface, not new construction. In the end, it doesn’t really matter. It was old plaster (which was damaged by electrical work and then smoothed by me). Level somewhere between Q2 and Q3.
I ordered everything from the painter’s shop; Haering isn’t so expensive that I need to save 100€. Especially since I used colored plaster. Two coats are mandatory there. And overall probably cheaper than base plaster + Haering + paint.
Our plasterer applies a base plaster WITH grain, so that the Haering plaster only needs to be rolled on once and then painted with STO Rapid Matt afterwards.
I think this is also better/cheaper in terms of price than applying the "expensive" roll plaster twice. But I don’t actually know – it’s just a guess!
My plasterer also said that the base plaster is important for the “hold” – so it serves as a primer.
I will definitely take a look at that and would like to adopt it that way, and refrain from the cheap version aka “apply roll plaster and then structure with a texture roller.”
How would you assess the difficulty level for a layperson with the plasterer’s method (which you mostly did as well)?