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Pwnage6191 Jul 2022 07:09Hello,
we are building a semi-detached house with a developer.
We have to do the painting work ourselves afterward
(we can no longer afford a professional painter).
We only imagined plastered walls
(which we find visually appealing).
Either just filling until the surface is smooth (e.g., Q3 level) and then painting the wall, or applying textured paint or roll-on render over the filled surface.
The developer has now expressed concerns and told us that in new builds there can be a very large number of small cracks.
We are building brick by brick with sand-lime brick (or rather, the developer is) and some walls are gypsum concrete, but about 90% are sand-lime brick.
How are your walls in new builds with only plastered surfaces, especially with sand-lime brick?
Some acquaintances who built with Ytong have so far only had minor cracks after 1.5 years (but only at the top of the wall, at the connection to the ceiling, with large cracks).
But not like the developer said, that there would be small cracks everywhere.
The developer recommends using painting fleece so that the cracks remain under the fleece.
I know that cracks can occur in new walls during the drying process, but we only know of occasional larger cracks, not many small or medium cracks everywhere.
I hope you can help me.
we are building a semi-detached house with a developer.
We have to do the painting work ourselves afterward
(we can no longer afford a professional painter).
We only imagined plastered walls
(which we find visually appealing).
Either just filling until the surface is smooth (e.g., Q3 level) and then painting the wall, or applying textured paint or roll-on render over the filled surface.
The developer has now expressed concerns and told us that in new builds there can be a very large number of small cracks.
We are building brick by brick with sand-lime brick (or rather, the developer is) and some walls are gypsum concrete, but about 90% are sand-lime brick.
How are your walls in new builds with only plastered surfaces, especially with sand-lime brick?
Some acquaintances who built with Ytong have so far only had minor cracks after 1.5 years (but only at the top of the wall, at the connection to the ceiling, with large cracks).
But not like the developer said, that there would be small cracks everywhere.
The developer recommends using painting fleece so that the cracks remain under the fleece.
I know that cracks can occur in new walls during the drying process, but we only know of occasional larger cracks, not many small or medium cracks everywhere.
I hope you can help me.
P
Pwnage6191 Jul 2022 08:02Thank you
How difficult is it to apply painting fleece without visible seams?
Does painting fleece smooth out cracks, or does it tend to tear quite quickly as well?
Yes, we know that filling and sanding is labor-intensive, but we like the appearance. We are just afraid that the wall will develop many cracks after a short time and won’t look good anymore.
Visually, we really like roller plaster, brush-applied plaster, or walls filled and painted to Q3/Q4 standard. We would prefer those options, but if they are not recommended because holes appear everywhere after a short time, we would switch to painting fleece.
How difficult is it to apply painting fleece without visible seams?
Does painting fleece smooth out cracks, or does it tend to tear quite quickly as well?
Yes, we know that filling and sanding is labor-intensive, but we like the appearance. We are just afraid that the wall will develop many cracks after a short time and won’t look good anymore.
Visually, we really like roller plaster, brush-applied plaster, or walls filled and painted to Q3/Q4 standard. We would prefer those options, but if they are not recommended because holes appear everywhere after a short time, we would switch to painting fleece.
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Nice-Nofret1 Jul 2022 08:47Plastering is not easy – you need 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 accommodate this if it is applied at the correct thickness, among other factors. In our case, sometimes a mesh had to be applied to the walls to prevent cracks.
Painter’s fleece is definitely the easier alternative.
Painter’s fleece is definitely the easier alternative.
I’m still not completely sure about the condition in which you will receive the walls. It surely won’t be just the bare masonry, right? There should be a plaster layer (which I believe is usually not part of the painter’s work).
Assuming the plaster is finished to Q2 level (quality level 2), then Q3 level joint filling is possible. It’s definitely a lot of work, but doing it yourself is definitely achievable! That would also be my preference. Applying painter’s fleece over Q2 plaster everywhere is not really ideal since the conditions for that simply aren’t right.
Please specify exactly how the walls will be delivered (and the ceilings as well).
Assuming the plaster is finished to Q2 level (quality level 2), then Q3 level joint filling is possible. It’s definitely a lot of work, but doing it yourself is definitely achievable! That would also be my preference. Applying painter’s fleece over Q2 plaster everywhere is not really ideal since the conditions for that simply aren’t right.
Please specify exactly how the walls will be delivered (and the ceilings as well).
I have exactly two rooms with a crack in the wall area at the corner, about 1 meter (3 feet) long, which appears due to movement of the concrete ceiling depending on the season. The exterior walls are made of aerated concrete, and the walls shared with the neighbor are made of sand-lime brick. In the room corners. In the corner areas, there are some cracks, but they are barely noticeable.
There is no mesh reinforcement in the plaster anywhere, except at the corners of windows and doors.
The cracks do not occur because of incorrect plastering by beginners, unless the technical datasheet is ignored. Plaster does not crack as previously described. A softer plaster may have slightly more tolerance than a hard cement plaster. The crack originates in the substrate.
If construction is done too quickly, the risk of cracking is higher. Cement-based materials shrink especially during the first months, and settlements can occur.
The contractor wants to protect themselves with this statement in advance, because construction schedules are often too tight, and cracking cannot be completely ruled out. It is better to warn more. In most houses, the announced extent of damage will not happen.
There is no mesh reinforcement in the plaster anywhere, except at the corners of windows and doors.
The cracks do not occur because of incorrect plastering by beginners, unless the technical datasheet is ignored. Plaster does not crack as previously described. A softer plaster may have slightly more tolerance than a hard cement plaster. The crack originates in the substrate.
If construction is done too quickly, the risk of cracking is higher. Cement-based materials shrink especially during the first months, and settlements can occur.
The contractor wants to protect themselves with this statement in advance, because construction schedules are often too tight, and cracking cannot be completely ruled out. It is better to warn more. In most houses, the announced extent of damage will not happen.
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