Painting work in new construction by own effort

Hello,

we are building a semi-detached house from a developer

we have to do the painting work ourselves afterward
(we can no longer afford a painter)

we only imagined plastered walls (which we like visually)

either just fill until it is smooth (e.g. Q3) and then paint the wall or apply textured paint or brush plaster on the filled wall.

The developer has now expressed his concerns and told us that there can be very, very many small cracks in new buildings

We are building brick by brick with sand-lime brick (or the developer) and a few walls of gypsum concrete but 90% sand-lime brick)

How are your walls with only plastered walls in new buildings especially with sand-lime brick?

In acquaintances' houses, after 1.5 years so far there have been hardly any cracks in the wall (but they built with Y-Tong) they only have thick cracks at the top of the wall, the connection to the ceiling

but not like the developer said that there will be small cracks everywhere


The developer recommends using painter’s fleece so that the cracks are under the painter’s fleece.

I know that cracks can occur in the wall during the drying process in new buildings, but we only know of occasional but larger cracks and not small and medium cracks everywhere
I hope you can help me

I would also recommend painter's fleece, but I am not sure if cracks would definitely appear otherwise. It just paints much more easily afterward. Filling and sanding repeatedly is really laborious. You have to like textured roller plaster.

Thank you

how difficult is it to apply [Malervlies] seamlessly?

does [Malervlies] even out the cracks or does [Malervlies] tear quite quickly?

Yes, we know that filling and sanding is labor-intensive but we like the look, we are just afraid that the wall will have many cracks after a short time and will no longer look good visually

visually, we really like [Rollputz], [Streichputz] or walls filled and painted with Q3/Q4
we would also prefer that but if it is not recommended at all because after a short time there are holes everywhere, we would switch to [Malervlies]

Plastering is not easy - you have to know how to do it! Of course, as beginners, you will get a lot of cracks. The house will settle - and the plaster will only move with it if it is applied in the appropriate thickness, etc. In some cases, we had to put a mesh on the walls to prevent cracks.

[Malervlies] is clearly the easier alternative.

Unfortunately, I haven’t quite clearly understood in what condition you will receive the walls? It certainly won’t be the bare stone wall, right? So there should be some plaster (which in my opinion doesn’t belong to the painters’ work either). Assuming there is plaster in Q2, then Q3 filling is also possible, it’s just a damn lot of work, but definitely doable by yourself! That would probably be my preference as well. Applying painting fleece everywhere on Q2 plaster doesn’t make anyone happy either because the conditions just aren’t right for it. Please write/clarify exactly how the walls will be handed over (and the ceilings?).

I have a crack in exactly 2 rooms within the wall area in the corner, 1m long, which appears depending on the season due to the movement of the concrete ceiling. The exterior walls consist of aerated concrete and the walls to the neighbor are made of sand-lime brick. In the room corners. In the corner areas, cracks partially appear, but they are not really visible. I also have no reinforcement mesh in the plaster anywhere, except in the corner areas of the windows and doors. The cracks do not occur because a beginner plasters incorrectly, unless you ignore the technical data sheet. A plaster does not crack as described before. A soft plaster may have a bit more tolerance than a hard cement plaster. The crack originates in the substrate. If construction is done too quickly, the risk of cracks is higher. Cementitious building materials shrink especially in the first months and settlements can occur. The contractor wants to protect himself in advance with his statement, because construction times are often too fast and one cannot rule out crack formation. It is better to warn more. In most houses, what he announces will not happen.