Do you mean a fence as high as a firewall? For me palitada is enough. Painting it with a quality brand would be better for aesthetis. Pwede rin pahiran mo waterproofing like boysen plexibond konting dagdag gastos na lang naman yan.

Mas mabuti na ito ang gawin mo kaysa move away a bit kasi ending nyan mas lalong exposed ang wall mo to rain at mas lalong mamamasa sa loob.

But the question is kung yard naman pala sa side mo why waterproof pa? Dahil uulanin din naman ang side mo.