What should a metal roof look like after two winters?
The same as it did the day it went on. On a concealed-fastener roof there are no exposed screws to back out, so the things we check are the seams, the flashing where the dormers meet the field, and the eaves. Colour is the slow one — PVDF Kynar 500 is tested to hold its finish over decades, so two winters should show nothing at all. If a roof has moved, two winters of freeze-thaw is when it tells you.


