The attic will hit R80. Brazelton is doing much of the traditional renovation work himself, with the help of his father and a few friends. He sleeps inside the unheated, unfinished house on a cot, sometimes with the family's two dogs for companions. The more complicated work is being handled by a professional builder, Ryan Stegora.
Go with an aluminum patch. Use aluminum rivits or screws. Avoid stainless or other metal screws due to the interaction of different metals. Use a sealant like 3m 5200 or Boatlife. Do not use fiberglass to patch aluminum. It just doesn't hold up well.
9 oz fiberglass cloth works well for this type of repair. It can be purchased in 2 to 4 wide tapes from many of the stores that sell our epoxy. A 1/8 thick laminate will require 4 to 5 layers of 9 oz fiberglass to fill the bevel. See the chart to gauge the number of layers required to equal your laminate thickness.