ᐅ Pergola Attached to Facade / Waterproofing

Hello,

I am going to install a pergola / louvered roof on our terrace. It will be freestanding and set on pad foundations.
I would like to position the louvered roof against the facade. To protect the plaster and ensure it is waterproof, I am thinking of using compressible sealing tape to seal the small gaps or unevenness in the plaster. I would place this between the facade and the pergola.

Is this suitable, or is there a better alternative?

Compressible foam tape yes, but also a wall connection profile (usually made of aluminum).

Is a wall connection profile really necessary?

I wanted, if possible, not to damage anything on the facade.
It is the south side, with an 80cm (31.5 inches) roof overhang, city villa…

Otherwise, it probably won't be watertight. You could try searching online to see if there are profiles that are only glued.

Water normally does not reach that area anyway… I usually have about 40cm (16 inches) of clearance, probably thanks to the overhang. I just want to be cautious.

With wind, rain regularly reaches 2 meters (6.5 feet) deep under our patio roof. During storms and thunderstorms, the rain can sometimes reach waist height against the patio door, which is at 3.5 meters (11.5 feet) deep. An overhang of 80 centimeters (31.5 inches) will protect you from normal rain showers, but you will still frequently experience rain in that area.