I started last summer by covering my house in rigid pink insulation, re-strapping and then installing 3X8 1/2 log siding from
Log Siding, Log Cabin Siding, Knotty Pine Paneling, and other Log Home Products Tongue and groove as well as end matched so their is no waste. I screw down through the tongue using 2 1/2" plated deck screws. Once the next course is on you cannot see any markings from the screws.