In the Commander community it's somewhat of a legend on their hulls particularly first generation being super thick, battleship, bulletproof, naval spec just to name a few I've heard. I've heard claims of 1" to 3" thick bottoms. As part of the bottom job I'm in the middle of on my first generation 42 Commander Sport Cruiser I have all the through hulls removed from the boat. I can tell you, those thickness claims are not true at all. My hull is no more than 3/4" thick, this is primarily near the stringers and chine. Away from those it's only 3/8-1/4" thick, even the keel. In general I would say this is enough as most Commanders don't have hull problems unless blocked improperly. Next time you hear some outrageous claim on how thick the boat is, remember this picture. This is from under my left engine for the sea water intake.
Great post. From what I’ve seen on my ‘66 CCC 38, I’m guessing 3/8 to 5/8 moving toward the keel. The keel itself seems quite thick. Nobody can argue with durability and longevity. I’m curious about what kinds of issues result from improper blocking. Thx!