Substrate treatment for new construction (roll) plaster

Hello everyone,

the following situation: at the moment, my house construction is in the final phase. It is a solid house (stone, concrete, and aerated concrete/Ytong walls), which will be handed over everywhere with Q2 filler. I want to paint some walls with textured roller plaster.

Now I am wondering how to treat the substrate before applying the textured roller plaster.

[*]Company A (from the hardware store) simply recommends applying a sealing primer with a roller and then applying the textured roller plaster. Okay and understandable. Opinions on this are mixed, but overall okay.
[*]Company B (from the Alpine foothills) recommends adhesion and deep primer and then the textured roller plaster. However, this company believes that an ignition protection is necessary for Ytong/aerated concrete. That would be a significant additional step for me, and I am wondering if this is still necessary on a filled wall (Q2).

Company B was used by the painter in my sister's house, looks great, and is my favorite. However, I am not satisfied with their statement or not sure whether the ignition protection is really necessary in addition. Can you help me here?

Best regards from the Rhineland

Company B was used by the painter in my sister's house, looks great and is my favorite. However, I am not satisfied with their statement or not sure if the fire retardant really needs to be applied additionally. Can you help me here?

Did you tell Alpenkalk that you are applying the roll plaster on Ytong or on (whatever kind of) plaster? The answer is different.
Why the lime roll plaster? I would "only" apply the primer on a normally plastered wall (gypsum plaster).

You can also take a look at Haering Deko Quarz elf. It’s also really great – can be mixed perfectly with the matching tinting color. No comparison to Knauf or other DIY store products.

I simply applied primer to the plaster and on top of that the roller plaster, without any problems.

You can also check out Haering Deko Quartz elf. It's really great too - can also be mixed perfectly with the matching tinting color. No comparison to Knauf or other DIY store products.

I've used it often and still find it great. I can only recommend it!

Thanks first of all!

Did you tell Alpenkalk that you apply the roll plaster on Ytong or on (whatever kind of) plaster? Because the answer is different.
Why the lime roll plaster? I would "only" apply the primer on a normally plastered wall (gypsum plaster).

You can also take a look at Haering Deko Quarz elf. It's also really great – can be mixed super well with the matching tinting color. No comparison to Knauf or other DIY store products.

It should be roll plaster, because I can handle that. Haering Deko Quarz elf seems to me to be paint plaster.

Alpenkalk actually says that bonding and primer are enough, but with Ytong you need the burn-in protection. That leaves the question whether that is necessary despite smoothing. The inquiry to the company was not well answered.

I simply applied primer on the plaster and then the roll plaster on top, without any problems.

Also on Ytong/aerated concrete?

I was just told to use everything from the same manufacturer, because then the products are coordinated with each other. But for me the question of burn-in protection remains.

It is supposed to be roller plaster, as I can handle it. Haering Deko Quarz elf seems to me to be brush plaster.

It is also simply rolled. Slightly more strenuous than rolling pure paint.