Material warranty
Covers defects in the shingles or metal panels themselves — the material failing to do what the manufacturer says it should. It does not cover how the roof was installed; that's a separate warranty, below.
It has to be registered in your name.
Manufacturer coverage is only valid once it's registered to the homeowner after installation. An unregistered roof has no material warranty at all, regardless of what was installed. We handle the registration paperwork on our end, but it's filed in your name — keep the confirmation.