I will, after tips from the forum, install outdoor gypsum in my fence to make it somewhat soundproof against the neighbor.
The fence will thus be double-sided and completely sealed with the help of outdoor gypsum that I mount in the middle of the fence.
What I wonder about is if I need any special protection for the gypsum? Or can it handle getting rained on and becoming damp now and then? I plan to mount it so that there is an air gap on both sides, and then there will be a cap on the fence. But it won't be 100% watertight.
Opinions on this?
