ᐅ Installing dimple membrane retroactively?

Created on: 7 Feb 2019 08:48
S
Stone
Hello everyone,

we are currently having the facade of our house replastered. For this, we removed the first row of patio slabs in front of the facade so the plasterer can work easily down to the bottom.

Now the idea has come up that since the facade is already being worked on, we might as well install a dimpled membrane – mainly to protect the plaster from rising moisture.

Here are the conditions:
The house was built in 1975. The basement is made of concrete blocks, partly sandstone blocks (from a previous building on the site). The upper floors, which form the main part of the facade, are built with aerated concrete blocks (Ytong). So far, we haven’t had any moisture issues in the basement. On the facade, a sort of waterline is slightly visible near the base, but only if you know where to look.

Our question now is whether installing a dimpled membrane makes sense in this situation or if it might actually be counterproductive. And if it is advisable, how far down should the basement wall be exposed for this to have any real effect?

Thanks in advance!
S
Stone
7 Feb 2019 16:37
So I could dig up a little, check the existing layer for any damage and repair it if necessary, and then protect this area with the dimple membrane?

That would at least be a small advantage compared to doing nothing at all, or am I mistaken?
S
Steven
7 Feb 2019 17:25
Zaba12 schrieb:
The studs can puncture the insulation when backfilling and simultaneously shifting the dimple membrane. .

Hello Zaba,

that can happen if it’s not done properly.
So, what is your advice? Do nothing at all? Because if it’s not done properly, the insulation foam can be damaged?

Steven