Most towns will allow two layers of roofing. However, some towns want to know the distance
from the gutter to roof ridge and what size rafters you have. They are concerned about the weight of
the second layer. Contractors should always contact your building department and ask them if you can
add a second layer on your existing roof. We always recommend ripping your existing roof so we can
inspect the decking and rafters so you can get the full manufacturers warranty.