Not a repair, but

Wanting to remove shingles from the back outside wall of garage

Thinking of removing shingles, the are old, cleaning the exposed plywood, then priming the exposed plywood, extra moisture guard
Then stapling up layers of a good moisture barrier that is White in color, added water guard and reflect white from Sun for plants
Then to create the rectangle containers to hold these little plants

Any added ideas, or experience with achieving?

Phill