does insulation, with a high R value, in the attic prolong the life of the shingles on the roof.
I don't get the connection between R-Value (insulation) and shingles that are exposed to the outside!
No. Ventilation prolongs the life of a roof. Ventilation also reduces the air conditioning bill by a huge amount. If you use a lot of AC, also add an automatic attic fan. As for insulation, the idea is to have a good R factor, relative to where you live, directly above the highest living space ceiling in the house
I partially disagree with the previous answers. Ventilation does help tremendously BUT in the winter a high R value keeps the heat from going through the ceiling through the attic to the roof heating up any snow on the roof which causes ice & ice dams to form, which in turn will shorten the life span of your roof.
no. attic ventilation can do this
