Is the waterproofing necessary?
We always recommend it for maximum safety.
Can DEFENDER be used on a stone wall with an irregular surface?
No, it is necessary to install it on a smooth and homogeneous surface (such as in concrete).
Can DEFENDER be used on interior walls and then plaster them?
It is not recommended.
Should DEFENDER be fastened with plugs?
No, is simply installed on the wall in concrete. Then proceed with the backfill and the installation of upper elements.