Hello,
I am now trying to fix some issues in my new property.
1, Under the exterior plasterboard, there is a pipe (I am not sure what is this for) under the plasterboard, is it possible to blocking it or installing something like mesh screen to blocking the entry point for small animals like possum or rat?

2. There is a missing timber / glass above the window, which making a big gap, great to have some suggestion of material suitable for exterior to block it.

Thank you.