Compared to (most) asphalt shingle roofs, (most) metal roofs last much longer and perform much better, as long as they are properly installed.
Metal roofs are considered to be more ecological than asphalt roofs, as their longevity usually means that the metal roof is the last roof the home will need. This longevity also means that fewer manufacturing resources are needed to produce this roof, compared to the resources needed for asphalt shingles over the life of the house.
However, this longevity of product may not be enjoyed by the homeowners, if the installation was not properly done. Even if the installers followed the manufacturer’s recommended installation practice, a roof may fail prematurely IF the roof covering was not properly integrated with the rest of the house structure.
So let’s look at what “should” be taken into account when considering a roofing solution.
Consulting PG 