i am a homeowner in the northeast seeking to repair our old and leaking flat roof and hoping to educate myself a bit during the estimate process.
of the two contractors so far, one would prefer to overlay with Firestone APP 160 cool process and aluminized coating. he said it would need recoating in about 8 years.
the other suggested a white granulated surface (Firestone APP 180 i think) and no additional surface treatment. he suggested this should be more or less maintenance free and warranted for 12 years. this estimate is almost 50% above the quote from the contractor using aluminum coated smooth modified bitumen.
i believe the current roofing material is a smooth modified bitumen with aluminized coating, definitely showing its age.
my questions are:
which material reflects a better choice for me, the homeowner ?
i am interested in a durable and trouble free roof, energy efficiency would be a bonus as well.
are there distinct advantages to one material over the other ?
is the difference in prices due to a large difference in materials cost ?
thanks for any help