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.
BondoÂ® Fiberglass Repair Kit 420 has everything needed for the Do-It-Yourselfer, including easy How-To directions, Fiberglass Resin, Liquid Hardener, Plastic Spreader, Fiberglass Cloth, Mixing Stick and Mixing Tray. Clean repair area with acetone or warm, soapy water to remove all dirt, grease, oil and contaminants.