ᐅ Exterior primer not applied uniformly?

Created on: 8 Mar 2026 09:29
2
219eu
2
219eu
8 Mar 2026 09:29
Greetings to the forum! The primer has been applied to the exterior walls at our site, but as a layperson, it doesn’t look sufficient to me.

I could somewhat understand if there were small “grain” gaps, but especially along the edges, there are gaps wide enough to fit the gold edge of a coin (I have attached photos).

The construction company says that the textured plaster is meant to cover that. But if that’s the case, I wonder why a primer is applied at all when some areas don’t seem covered by it. I’m concerned that there might be hollow spots later on that could cause problems.

Is the condition shown in the attached photos normal, or should I be more insistent about it? It mainly concerns the areas around several windows.

Thank you very much for your answers!




M
MachsSelbst
8 Mar 2026 12:09
Once the base coat plaster is applied, it will no longer be visible.
2
219eu
8 Mar 2026 15:04
It’s not about whether it can be covered up; otherwise, you might as well skip the primer. My point is that the primer surely serves a purpose, which would then be missing in those areas, right?
M
MachsSelbst
8 Mar 2026 21:44
What exactly is supposed to happen if the primer is missing over a 2mm (0.08 inch) gap?
2
219eu
8 Mar 2026 22:20
The primer is supposed to prevent the plaster from having color variations caused by uneven drying when moisture is absorbed faster underneath, and to ensure proper adhesion. What “should” happen then results in the opposite.
M
MachsSelbst
9 Mar 2026 09:09
In this case, I would actually say that you should trust the company that probably does this every day for decades, and that such small defects are not a problem...