ᐅ Is it possible to test the strength of exterior plaster?

Hello everyone,

our new exterior plaster seems very delicate to us. My husband lightly bumped it with the empty trash bin in one spot, and it chipped off immediately. The same happens with slight impacts when installing outdoor lights. The plaster feels quite soft.

Are there any standards or values for impact resistance? And how can this be tested?

We have Poroton bricks (no external thermal insulation composite system) and the plaster consists of three layers with full-surface reinforcement and is 3 weeks old.

Thanks to all of you.

Plaster dries and hardens. At first, it is quite soft.

I would have thought that three weeks after applying the topcoat plaster, everything would be dry and fully cured by then. Really, the process is still not finished at that point?

Take a look at the datasheet of the materials used.
What thickness was applied for each?

It should actually be dry by now. However, it also depends on the weather conditions.

anat79 schrieb:

I would have thought that everything should be dry and fully cured three weeks after applying the top coat? Really, the process isn’t finished yet?

Yes, it is dry by then. And that doesn’t sound good.

Just ask your construction supervisor or plasterer.