 Is it shaded most of the day or is it getting direct sun? Is the attic properly ventilated? A properly ventilated attic will allow your roof to breathe and to last a lot longer. As far as those warranties go, Damien, a shingle roof warranty is much like a tire warranty or a battery warranty. So, you know, it's going to be prorated. So if you had a 30-year roof and 20 years into it, it is no longer serviceable.