Neighbouring roofs are like a preview of what your own roof might face over time. If you see many of them covered with heavy moss, algae, or repeated repairs, it can suggest that the climate or local conditions encourage certain issues – constant damp, shade, tree fall, or strong winds.

You might also notice patterns of damage: tiles frequently slipping on one side, corrugated sheets rusting at particular edges, or repeated patching around chimneys and vents. All of that hints at where water tends to collect or where wind hits hardest.

These clues help you ask better questions about your own building’s roof: How is drainage handled? What materials were used? How often is maintenance done?

Instead of guessing, you’re learning from the “history” written on your neighbours’ roofs.