7:40 wrote:

"I think the crux of the issue is not really insulation - but rather
ventilation ... is your "storage " area going to be well
ventilated to the great outdoors - or sealed off from outside
temperatures ?
John T. "

In a traditional unoccupied attic, the only thing the roof keeps
out is the beating sun in summer, and precipitation and strong
winds year round. Other than that, it is ventilated, around the
edges where the eaves meet the attic deck, and optionally,
via a ridge vent along the peak. That is why we insulate the
attic deck(the ceilings of the highest rooms in the house).

This should be common knowledge John.