Wow, I love all the numbers and PSI/ratios/etc., stuff. Especially since I was an engineer
in my former life. But back to real life. The common shared concept
in both guys is _ "properly built". In real life be it amateur or professionally built, money
rules and so huge numbers of boats - FRG, Metal, or FerroC just are not "properly built."
a used boat
, your best chance - without some very serious examination - of getting a reasonably sturdy boat is to go with FRG - witness the overwhelming numbers of FRG boats out there.
As to metal boats, the axiom for steel
is "never buy used steel". The rationale for that is steel
is more expensive and must be kept dry and clean or it rusts from the inside out. Most used boats are sold because the owner lost
interest in the boat or cannot afford to maintain the boat.
is better in the corrosion
arena - but - it must have had an owner seriously interested in keeping it away from copper (pennies, paints, etc.).
Wood, well, ever heard of "worms"? Used, inexpensive wood boats are probably in the same ranking as ferrocement. Even FRG covered wood is tricky as any collision
damage due to reefs
, rocks, etc. can open the underlying wood to infestation. I had a friend years ago that brought his magnificant mohogany cutter
into the boatyard for repair to a leaking plank and ending crying for days after finding serious infestation thorugh the hull
. The boat ended up in the dumpster.
And ferrocement, again there must be a reason why insurance
companies are extremely unlikely to insure them and a reason for the very low resale prices compared to other hull
materials. I would have to agree that "properly" done FC is up there with steel - but how many are "properly" done?
So, bottom line when looking for a used boat
- if you are knowledgable (seriously knowledgable) FC and Steel are the best bets followed by Aluminum
and then FRG. If you are a normal person then FRG is the least "risky" choice.
Prices of used boats, like anything else, follows the real quality of construction and reputation of the manufacturer mitigated somewhat by the overall reputation of the hull material of the whole world fleet of that material.
There are fantastic bargains out there on serious quality boats in any hull material - the trick is finding them. That takes time, education/research, and luck.