Does T&G Carsiding Meet Code?
Ask your B.D. Most locales require 1/4" plywood or paneling to meet fire code. I would prime the boards for moisture protection, air seal the surface behind with the foam boards (and get a thermal break from the rafters).
Be safe, Gary
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!