National Park began in 1895 as a Methodist retreat on the Delaware, and the street grid still reflects that: about three thousand people on one square mile of land, lots narrow, houses close. Many started small and grew by addition. What that leaves is a lot of roof plane per house, much of it shallow, over porches, sunrooms and back extensions that were never designed as part of the original roof.
Those shallow sections are where we spend the most attention, because asphalt shingle does not belong on them. EPDM or TPO membrane does, tied properly into the steeper shingle above. Roof permits are issued and inspected by the Borough of National Park construction office under the New Jersey Uniform Construction Code.